FINAL REPORT FOR TAMARISK ERADICATION AND RESTORATION OF 63 TRIBUTARIES IN GRAND CANYON NATIONAL PARK Arizona Water Protection Fund Contract Number 99-075WPF Prepared by: Lori J. Makarick Restoration Biologist Grand Canyon National Park 823 North San Francisco, Suite B Flagstaff, AZ 86001-3265 Phone: (928) 635-0139 Email: Lori_Makarick@nps.gov and Heidi Kloeppel Grand Canyon Wildlands Council P.O. Box 1594 Flagstaff, AZ 86002 Phone: (928) 556-9306 Email: heidi@grandcanyonwildlands.org Please Note: This report, including Appendices, is included on the accompanying compact disk. The disk also contains a complete set of the project photographs and maps. I. Abstract..............................................................................................................................................4 II. Introduction .....................................................................................................................................5 a. Overview of project status............................................................................................................................ 5 b. Justification for recent work.......................................................................................................................... 6 III. Methods...........................................................................................................................................7 a. Area of interest in recent analysis ................................................................................................................. 7 Table 1. Preliminary Tamarisk Surveys and Final Project List .................................................................. 8 b. Dates, times and conditions under which work was completed................................................................. 11 Table 2. October 13-31, 2000 Participant List........................................................................................... 11 Table 3. October 11-28, 2002 Participant List........................................................................................... 12 Table 4. November 8-25, 2002 Participant List........................................................................................ 12 Table 5. October 3-20, 2003 Participant List ............................................................................................. 13 Table 6. October 29 - November 15, 2003 Participant List ...................................................................... 13 Table 7. May 25-June 14, 2004 Participant List ........................................................................................ 14 Table 8. October 2002 Itinerary.................................................................................................................. 15 Table 9. November 2002 Itinerary.............................................................................................................. 16 Table 10. October 2003 Itinerary................................................................................................................ 17 Table 11. November 2003 Itinerary ........................................................................................................... 18 Table 12. May-June 2004 Itinerary ............................................................................................................ 19 c. Tamarisk control methods and conditions................................................................................................... 19 Manual Removal ......................................................................................................................................... 20 Garlon Lance Injection................................................................................................................................ 20 Girdle Method (a.k.a. Hack and Squirt) ...................................................................................................... 20 Cut Stump Method ...................................................................................................................................... 20 Basal Bark Application ............................................................................................................................... 20 Combination (a.k.a.combo)......................................................................................................................... 20 Mitigation Measures.................................................................................................................................... 20 Herbicide Use .............................................................................................................................................. 21 d. Tamarisk project monitoring methods and conditions................................................................................ 21 e. Analysis of methods.................................................................................................................................... 22 IV. Results ...........................................................................................................................................23 a. Results of project implementation .............................................................................................................. 23 b. Graphs, charts and tables pertaining to results ........................................................................................... 26 Table 13. Tamarisk Treatment Totals......................................................................................................... 26 Table 14. Tamarisk Retreatment Totals ..................................................................................................... 28 Figure 1. Tamarisk Control by Size............................................................................................................ 29 Figure 2. Tamarisk Control by Method...................................................................................................... 29 Figure 3. Tamarisk Retreatment by Size Class .......................................................................................... 30 Table 15. Percent Tamarisk Reduction Rate 2000 to 2004....................................................................... 30 Figure 4. Frequency of Tamarisk Before and After Treatment................................................................. 31 Figure 5. Mean Number of Tamarisk Before and After Treatment.......................................................... 31 Figure 6. Substrate Frequency Before and After Treatment ..................................................................... 32 Figure 7. Percent Occurrence Growth Form Before and After Treatment ............................................... 32 V. Discussion and Conclusions ..........................................................................................................33 a. Discussions and conclusions about results ................................................................................................ 33 Table 16. Tamarisk Retreatment to Date – Percentage by Size Class ...................................................... 33 b. Discussion and conclusions about results with relation to related literature. .......................................... 33 VI. Management Recommendations ................................................................................................35 a. Overview of management options ............................................................................................................. 35 b. Management recommendations and justification ..................................................................................... 36 VII. Literature Cited..........................................................................................................................36 VIII. Appendices.................................................................................................................................39 I. Abstract Tributaries and side canyons of the Colorado River, and seeps and springs in Grand Canyon National Park (GRCA), are among the most pristine watersheds and riparian habitat remaining in the coterminous United States. These riparian systems deserve a high level of protection from non-native plant invasion. The encroachment of tamarisk (Tamarix ramosissima, T. aphylla) into these tributaries poses a significant threat to the integrity of the natural ecosystems. GRCA and the Grand Canyon Wildlands Council (GCWC) are committed to the preservation of native plant communities and native ecosystems. National Park Service (NPS) Management Policies require park managers “to maintain all the components and processes of naturally evolving park ecosystems, including the natural abundance, diversity, and genetic and ecological integrity of the plant and animal species native to those ecosystems” (NPS 2001b). Park managers are directed to give high priority to the control and management of exotic species that can be easily managed and have substantial impacts on the Park’s resources (NPS 1985, NPS 2001b). The primary objectives of this project are to remove tamarisk from 63 tributaries of the Colorado River in Grand Canyon National Park and to monitor the success of the tamarisk removal through pre- and postremoval plant monitoring. This project has been ongoing for two years and has significantly reduced tamarisk distribution within the treated areas and allowed native vegetation to reestablish without exotic plant competition. Prior to initiation of the project, park staff completed extensive public scoping in order to prepare an Environmental Assessment / Assessment of Effect (EA/AEF). Under the Director’s Orders on Compliance (NPS 2001a) staff considered the cumulative effects of multiple projects, and included an analysis of tamarisk removal in all of the park’s tributaries. After review of the public comments GRCA issued a Finding of No Significant Impact (FONSI) for the project in June 2002. Upon completion of the FONSI GRCA restoration biologist Lori Makarick worked with the GCWC to revise the Tamarisk Eradication Plan, budget and contract for this project, and then began to plan the logistics for the fall 2002 river trips. Project leaders and crew members conducted the first two tamarisk control trips in the fall of 2002 and the second two management trips in the fall of 2003. GRCA staff, supported by supplemental funds, completed 3 additional tamarisk management trips to complete follow-up treatment work and initiate this work in other project locations during the timeframe of this contract. During the timeframe of this contract, crews have removed 70,616 tamarisk trees in 70 project areas. This report summarizes the work completed to date on this project and reconfirms the commitment by the NPS and GCWC to the protection of biodiversity. II. Introduction a. Overview of project status. The project entitled “Tamarisk Eradication and Restoration of 63 Tributaries, AWPF Contract Number 99-075WPF)” within Grand Canyon National Park (GRCA) is now completed and the National Park Service (NPS) accepts the responsibility for follow-up maintenance and monitoring. GRCA and Grand Canyon Wildlands Council (GCWC), in partnership, fulfilled the terms of the grant agreement. To date, three previous reports for this grant have been submitted (fall 2000, fall 2002, and fall 2003), along with additional progress reports and memos. This report combines some of the information from previous reports and is the final report for this contract. Prior to in the field tamarisk management, the NPS worked for two years to complete the first task listed in the above contract. The task was to “obtain all permits and environmental clearances necessary to conduct the proposed work.” The compliance process was longer than anticipated, due to revised NPS compliance guidelines issued in 2001. The new guidelines, Director’s Order #12: Conservation Planning, Environmental Impact Analysis, and Decision Making, required that the NPS complete public scoping and documentation prior to the initiation of this project (NPS 2001a). The documentation aims to ensure the use of interdisciplinary approaches and principles to decision-making, and that all decisions are based on technical and scientific information. Public scoping and interdisciplinary team discussions about tamarisk management began in 1998. The NPS issued the final Environmental Assessment / Assessment of Effect (EA/AEF) for the project to the public in February 2002. Staff received and analyzed public comments, and prepared a Finding of No Significant Impact Statement (FONSI), signed by the regional office on June 18, 2002. The park received a written response to the Informal Consultation with the U.S. Fish and Wildlife Service (USFWS) on January 25, 2001 and that letter, along with the incorporation of their recommended changes, completed the Section 7 consultation that was necessary for this project. On April 8, 2002, the State Historic Preservation Officer (SHPO) provided the park with written concurrence on the project moving forward. By mid-June 2002, all of the necessary permits and clearances for this phase of the overall project were in hand. Project leaders revised the Tamarisk Eradication Plan and Final Tributary List to incorporate the new project timeline, as follows: • October 2000 – 18-day river trip, project monitoring installation • October 2002 – 18-day river trip, tamarisk eradication trip #1 • November 2002 – 18-day river trip, tamarisk eradication trip #2 • October 2003 – 18-day river trip, tamarisk eradication trip #3 • November 2003 – 18-day river trip, tamarisk eradication trip #4, and post-project monitoring and follow-up maintenance • Spring 2004 – 18-day river trip, post-project monitoring and follow-up maintenance With the project initiated and the preliminary funding secured from the Arizona Water Protection Fund (AWPF), the NPS sought and received additional assistance for this project. GRCA staff, along with the NPS Exotic Plant Management Team (EPMT) based in Lake Mead National Recreation Area, completed one additional tamarisk management trip in March of 2003. Colorado River Fund monies supported the trip, and participants completed follow-up work in 14 of the 63 areas included in this AWPF funded project. During September 2003 volunteers manually retreated eight of the tributaries included in this project; the National Park Service’s Cooperative Conservation Initiative funded that work. In March of 2004, the NPS’s Colorado Plateau EPMT, the Colorado River Fund, and the Grand Canyon National Park Foundation (GCNPF) supported an 18 day river trip to assist with project work and initiate work in Phase II project locations. Throughout this project the public and volunteers remained enthusiastic and supportive. At this time, the NPS and GCNPF are seeking additional funds to extend this project into Phase II and continue the required maintenance and monitoring of tributaries funded by this AWPF grant. In addition to acquiring funding to support three trips during the period of this contract, the NPS received over $115,000 to continue this valuable project and essential restoration work between September 2004 and March 2005. b. Justification for recent work Tamarisk (Tamarix sp.), commonly known as salt cedar, is an invasive, exotic (i.e. nonnative) shrub or tree that grows in dense stands along rivers and streams in the West. Invasive exotic species are ecologically damaging because they crowd out native plants and threaten biodiversity, habitat quality, and natural ecosystem functions. Tamarisk, introduced to the U.S. in the 19th century as an erosion control agent, spread through the West and caused major changes to natural environments. Tamarisk reached the greater Grand Canyon area during the late 1920s and early 1930s, and became a dominant riparian zone species along the Colorado River following completion of Glen Canyon Dam in 1963, with the fastest invasion likely occurring between 1935 and 1955 (Christensen 1962). The impacts caused by tamarisk in the Southwest are well documented (refer to Reference Section of the EA/AEF and Stevens 2001). These prolific nonnative shrubs displace native vegetation and animals, create conditions that are inhospitable for the germination of native plant seeds, and increase fire frequency. Salt cedar is an aggressive competitor, often developing monoculture stands and altering water tables, which can negatively affect wildlife and native vegetative communities (Duncan 1996). In many areas, tamarisk occupies previously open spaces and is adapted to a wide range of environmental conditions. Once established in an area, it typically spreads and persists. Distinctive soil types, vegetation, and hydrologic conditions characterize riparian areas that contain biologically diverse and productive ecosystems. In the Southwest, riparian areas account for less than 2% of the land, yet over 65% of Southwestern wildlife depend on riparian habitats. These habitats are the most productive, most valuable and most threatened habitats in the American Southwest (Johnson et al. 1985). Desert seeps and springs rank among the most productive and biologically diverse terrestrial ecosystems and commonly host 100- to 500-fold higher concentrations of species than the surrounding landscapes (Grand Canyon Wildlands Council 2003). Southwestern seeps and springs are often isolated islands of habitat that support an unusual proportion of relict and endemic species, contributing significantly to regional biodiversity. Perennial tributaries, seeps, and springs also provide habitat for many of the obligate wetland species and within GRCA including four endemic plant species: Kaibab sedge (Carex curatorum), Navajo sedge (C. specuicola), an undescribed thistle (Cirsium sp.), and McDougall’s yellowtops (Flaveria mcdougallii) (Spence 2002). Tributaries and side canyons of the Colorado River, as well as seeps and springs in GRCA, are among the most pristine watersheds and desert riparian habitats remaining in the coterminous United States. These riparian systems deserve a high level of protection from exotic plant invasion. The recent encroachment of tamarisk into these tributaries poses a significant threat to the integrity of the natural ecosystems. GRCA is committed to the preservation of native plant communities and native ecosystems (NPS 1995a, NPS 1995b). NPS management policies require park managers “to maintain all the components and processes of naturally evolving park ecosystems, including the natural abundance, diversity, and genetic and ecological integrity of the plant and animal species native to those ecosystems” (NPS 2001b). Park managers are directed to give high priority to the control and management of exotic species that can be easily managed and have substantial impacts on the Park’s resources (NPS 1985, NPS 2001b). The central mission of the GCWC is to create and apply a dynamic conservation area network that ensures the existence, health, and sustainability of all native species and natural ecosystems in the Grand Canyon ecoregion, with a primary goal of restoring natural processes. The removal of tamarisk from these tributaries will provide this protection, encourage ecosystem sustainability, promote native plant community recovers, and allow both the NPS and GCWC to adhere to their central missions and policies. III. Methods a. Area of interest in recent analysis Under this contract, crews completed tamarisk control work in more than 63 areas within Grand Canyon National Park. Project leaders selected the tributaries based on the numbers of tamarisk trees found during the preliminary surveys (i.e. feasibility of control at this time) and the extent of the seeps, springs, and riparian habitat found within the project areas. Prior to project initiation, crews conducted tamarisk surveys in all of the tributaries on the approved list (Table 1). Survey crews hiked as far up the tributaries as logistically possible and counted all tamarisk trees. Trees were broken down into the following categories: Seedling Newly emerged plants up to 1m tall Sapling Plants with less than 5cm diameter at the base of the trunk Mature Plants with greater than 5cm diameter at the base of the trunk, or with multiple branching at the base of the trunk Note: The category of seedling does not adhere to the strict botanical definition, which means that the cotyledon is still attached to the emerging plant. For the purposes of the surveys, seedling denotes a plant that could be manually removed. Survey crews also recorded ancillary data about the canyons such as general information about the canyon and access from the river. The surveys provided the baseline information necessary for determining trip schedules and logistics. Surveys revealed that the majority of the tamarisk trees that occur in side canyons are seedlings, which can be manually removed. The funding received for this project allowed the NPS and GCWC to initiate control while it was still feasible. Table 1. Preliminary Tamarisk Surveys and Final Project List Tamarisk Size Classes River Mile River Side Canyon Seedling Sapling Mature TOTAL Tamarisk SW Willow Flycatcher Habitat Assessment Complete Archaeological Resources Within 300m 11 R Soap Creek 2000 62 10 2072 X X 20.5 R North Canyon 2 7 16 25 X 37.7 L Tatahatso Wash 0 7 1 8 X 39 R First redbud alcove 19 8 8 35 X 39.2 R Second redbud alcove 0 0 6 6 X 40.9 R Buckfarm Canyon 5 5 14 24 X 41.2 R Bert's Canyon 0 0 8 8 X X 56.2 R Kwagunt Creek 8 35 5 48 X X 57.5 R Malgosa Canyon 0 0 80 80 X X 64.7 R Carbon Creek 47 49 54 150 X 65.5 R Lava Canyon 46 245 161 452 X X 65.7 L Palisades Creek 0 4 11 15 .. X 69.8 R Basalt Canyon 1000 200 40 1240 X X 74.1 R 74 mile Wash 0 4 0 4 X 75 R Escalante Creek 8 19 3 30 X 75.6 L 75 mile Creek 697 65 14 776 X X 81 R Vishnu Creek 10000 71 44 10115 X 84 L Lonetree Canyon 130 8 21 159 X 84 R Clear Creek 2 4 14 20 X 85 R 85 mile Spring 5 16 5 26 X 88 R Lower Bright Angel Creek 1000 131 135 1266 .. 91.6 R Trinity Creek 30 101 38 169 .. 92.5 L Salt Creek 0 0 4 4 X 93.5 L Monument Creek 87 74 245 406 X X 94 R 94 mile Creek 155 202 238 595 X 94.9 L Hermit Creek 230 58 25 313 X 96.7 L Boucher Creek 40 100 40 180 X 99 R Tuna Creek 487 39 70 596 X 105 L Ruby Canyon 6 26 36 68 X 106 L Serpentine Canyon 0 10 38 48 X 107.8 R Hotauta Canyon 11 20 20 51 X X 107.8 L South Bass Canyon 3 19 20 42 .. X 111 R Hakatai Canyon 0 0 100 100 .. 112 R Waltenberg Canyon 12 20 11 43 X 114.5 L Garnet Canyon 10 118 25 153 X 116.5 L Elves Chasm 1 10 26 37 X X 117 L Bighorn Wash 100 47 14 161 X 120 R Lower Blacktail Canyon 40 0 4 44 X X 120 R Upper Blacktail Canyon 0 15 16 31 X 122 R 122 Mile Creek 2 2 10 14 X X 122.7 L Forster Canyon 16 83 22 121 X X 124.9 L Fossil Canyon 4 10 25 39 X X 128 R 128 Mile Creek 73 37 110 220 X 129 L Specter Chasm 14 35 1 50 X 130.5 R Bedrock Canyon 96 200 94 390 X X 131.8 R Galloway Canyon 10 34 118 162 X X 132 R Stone Creek 0 2 2 4 .. 133 R 133 Mile Creek 4 17 22 43 X 138.5 R Cranberry Canyon 9 24 3 36 X 139 R Fishtail Canyon 0 1 7 8 X X 142 R 142 Mile Spring 0 12 2 14 X 147.8 L 148 Springs 0 0 2 2 X 147.9 L Matkatamiba Canyon 500 0 4 504 X 150 R 150 Mile Canyon 15 14 1 30 X 152 R Spring above 152 "Ledges Camp" 19 22 15 56 X X 155 R Slimey Tick Canyon 158 9 4 171 X 155.5 R Last Chance Canyon 32 14 2 48 X 164.5 R Tuckup Canyon 0 3 11 14 X 168 R Fern Glen Canyon 0 3 1 4 X 171 R Stairway Canyon 3 4 4 11 X X 174 R Cove Canyon - Lower 14 47 74 135 X X 174 R Cove Canyon - Upper 350 4 7 361 X X 209 R 209 Mile Canyon 350 102 43 495 X X 212 R Bessie’s Camp Creek 0 0 15 15 X 214 R 214 Mile Creek 6 22 14 42 X X .. Southwest willow flycatcher habitat surveys will be completed in these areas before tamarisk control begins. A general description of the overall project areas illustrates the importance of protecting and restoring these project areas. High species diversity, high species density, and high productivity generally characterize these riparian areas. Continuous interactions occur among riparian, aquatic, and upland terrestrial ecosystems through exchanges of energy, nutrients, and species. Warren et al. (1982) provided the following description: “Riparian woodlands (or forests) characterized by cottonwood-willow associations are primarily restricted to the larger perennial streams and drainages of the Colorado Plateau region of northern Arizona. The great biological importance and floristic diversity of these cottonwood-willow riparian forests is disproportionate to their limited total area…. Riparian scrub usually occurs along ephemeral or intermittent watercourses (such as desert arroyos), or in narrow canyons which are periodically scoured by floods. Riparian scrub communities are characterized by a broad continuum of vegetative associations that range from mesic vegetation types to xeric growth along desert arroyos (Brown et al. 1980). These arroyos often contain water only one day or less each year and the resulting vegetation is commonly composed of a mixture of facultative riparian species and upland species. This is in contrast to mesic species, which are generally absent from the surrounding uplands…. Side canyons throughout the park with perennial water support riparian vegetation characterized by cottonwood (Populus fremontii) and willow (Salix spp.) which is generally very similar to that found in similar situations throughout northern Arizona (Phillips and Phillips, 1979)….” Each dry wash, spring, seep, or stream has a different association of species, depending on environmental features including elevation, permanence of water, substrate, frequency of flooding, and colonization (Warren et al. 1982). Riparian vegetation typically occurs in small, discrete stands or patches. The floristic diversity in wetland and riparian composition is highly variable, but is extremely high when compared to the upland vegetation. Typical stands may consist of broad-leaved deciduous trees in the overstory, with a mixture of shrubs and grasses in the understory. Species typical of drainages with perennial water sources are: . Fremont cottonwood (Populus fremontii) . Brickellia (Brickellia longifolia) . Catclaw acacia (Acacia gregii) . Apache plume (Fallugia paradoxa) . Willow (Salix exigua, Salix goodingii) . Monkey flower (Mimulus cardinalis) . Mequite (Prosopis glandulosa) . Emory baccharis (Baccharis emoryi) Species typical of drainages with dry washes or intermittent water are: . Catclaw acacia (Acacia gregii) . Baccharis (Baccharis spp.) . Snakeweed (Gutierrezia sarothrae) . Apache plume (Fallugia paradoxa) . Utah agave (Agave utahensis) . Mormon tea (Ephedra spp.) . Four-wing saltbush (Atriplex canescens) . Fremont cottonwood (Populus fremontii) . Skunkbush (Rhus trilobata) . Red-bud (Cercis occidentalis) Upland species, described below, are also present in these dry or intermittent washes. Trees and shrubs tend to be scattered, but may also form dense thickets. Species composition varies depending on moisture availability, elevation, and geographic location in the canyon. Within the park, tamarisk occurs in the many of the side canyon and tributaries; however, the distribution and density is highly variable. The vegetation surrounding the tributaries is generally from desert scrub communities, which are composed of plant species from three of the four North American desert floras, the Sonoran, Mojave and Great Basin. The Sonoran desert scrub has the highest diversity of species. A two-season rainfall regime and lack of freezing temperatures characterizes the Sonoran desert (Warren, et al. 1982). The Mojave desert scrub has higher local species diversity, but is primarily dominated by shrubs; it is characterized by winter rains and the absence of freezing temperatures (Warren, et al. 1982). The Great Basin desert receives more winter rain than the Mojave, and frequently has severe winter freezes and the lowest diversity of the three (Warren et al. 1982). Big sagebrush (Artemisia tridentata), rabbitbrush (Chrysothamnus spp.), Mormon tea (Ephedra spp.) and a variety of perennial grasses dominate the Great Basin desert scrub. These associations are typically found in the lower portion of the canyon and comprise the vegetation surrounding some of the middle and lower tributaries. Typical Mojave desert species include blackbrush (Coleogyne ramosissima), turpentine broom (Thamnosma montana), bladder sage (Salazaria mexicana), and other species. The Sonoran desert species include brittle bush (Encelia farinosa), catclaw acacia (Acacia greggii), ocotillo (Fouquieria splendens) and desert willow (Chilopsis linearis). Sonoran associations occur in the lower portion of the canyons, and many of these species can grow directly in infrequently scoured drainages. b. Dates, times and conditions under which work was completed In October 2000, crews installed photopoints and vegetation transects. Crews completed the tamarisk control work in October-November 2002 and 2003, and February-March 2004, with supplemental work funded by other sources during March, September and November 2003, and March 2004. The fall months are ideal for tamarisk work since the trees are still actively transporting nutrients and water through the phloem and xylem, thus the insertion of herbicide into the tree yields effective control results. However, crews did complete supplemental project work in the spring, with good results. Due to the remoteness of the terrain, it was necessary to access the majority of the project areas from the river, with the exception of Monument Creek, South Bass, Hermit Creek and Lower Bright Angel Creek, where crews were able to backpack into. Each of the fall trips launched from Lees Ferry and ended at Diamond Creek, with the exception of the October 2000 trip which proceeded, with shivering cold participants, all the way to Pearce Ferry due to the closure of the Diamond Creek road following a flash flood. On the fall 2002 and 2003 trips there were 16 participants and 5 rafts, on the March trips (supported by other funds) there were 18 participants (including two archeologists) and 6 rafts, and on the October 2000 trip there were 12 participants and four rafts. Backpacking trips into South Bass, Hermit Creek, Monument Creek and Bright Angel Creek occurred in February and March 2004. The strong volunteers not only carried their personal gear, but also strapped tools and project supplies to their backpacks. On each river trip there was an exchange at Phantom Ranch, where new, invigorated volunteers arrived to assist with the project. Often, the upper half volunteers told horror stories about the long days and blisters, yet the newly arrived workers persevered and climbed into the rafts, waving goodbye to the previous group. On each trip, the workdays were extremely long, with coffee served between 6:00 and 6:30 a.m., and dinner often not ready until long after dark. Yet, on each trip, the participants enjoyed the project work, functioned as an integrated unit, and composed songs and stories about the work. The dedication and perseverance of all of the crew members was truly amazing and contributed to the overall success of the project. The hearty volunteers were absolutely crucial to the project accomplishments. Volunteers donated 800 hours in October 2002, 1005 hours in October 2002, 1248 hours in November 2002, 1620 hours in October 2003, and 959 hours in November 2003, 1000 hours in June 2004, 324 hour in March 2004 through backpacking trips, and more than 1000 additional hours on separately funded river trips supporting this project. In total, volunteers donated 7956 hours to this project during its first four years, a value of more than $115,000 dollars. Please refer to the previous reports for the complete project hour data. Table 2. October 13-31, 2000 Participant List Role Upper Half Lower Half Trip Coordinator / Project Leader Lori Makarick Lori Makarick Head Boatman / Trip Leader Dave Desrosiers Dave Desrosiers Boatman Tim Stephenson Tim Stephenson Boatman Matt Vandzura Matt Vandzura Boatman Bryan Edwards Bryan Edwards Crew Leader #1 Rachel Stanton Rachel Stanton Crew Leader #2 Eric North Chris Moore Crew Leader #3 Fred Phillips Fred Phillips Cook / Worker Simone Sellin Simone Sellin Volunteer Kelly Burke Kelly Burke Volunteer John Grahame John Grahame Volunteer Roy Zipp Boone Vandzura AWPF Representative Salinda Border Dave Christina Volunteer Donna Koster Donna Koster Volunteer Matt Gontram Matt Gontram Table 3. October 11-28, 2002 Participant List Role Upper Half Lower Half Trip Coordinator / Project Leader Lori Makarick Lori Makarick Head Boatman / Trip Leader Bob Dye Bob Dye Boatman Kim Crumbo Kim Crumbo Boatman R.J. Johnson R.J. Johnson Boatman Alison Steen Alison Steen Boatman (volunteer) Chris Louderback Chris Louderback Crew Leader #1 Kim Fawcett Kim Fawcett Crew Leader #2 Kate Watters Kate Watters Crew Leader #3 Fred Phillips Anne Hadley Cook / Worker Simone Sellin Simone Sellin Archeologist Lisa Leap Regis Mayo Volunteer Kelly Burke empty Volunteer Herman Griego Bianca Volunteer Emily King Steve Till Volunteer Donna Koster Donna Koster Volunteer Matt Gontram Matt Gontram Table 4. November 8-25, 2002 Participant List Role Upper Half Lower Half Trip Coordinator / Project Leader Lori Makarick Lori Makarick Head Boatman / Trip Leader Bob Dye Bob Dye Boatman Dan Hall Dan Hall Boatman Alison Steen Alison Steen Boatman Chris Louderback Chris Louderback Boatman (volunteer) Matt Gontram Matt Gontram Crew Leader #1 Kim Fawcett Kim Fawcett Crew Leader #2 Kate Watters Kate Watters Cook/Worker Simone Sellin Simone Sellin Volunteer Rona Levine Shawn Edwards Volunteer Monty Tillinghass Steve Lomadafkie (tribal) Volunteer Beth Eisenberg Beth Eisenberg Volunteer Donna Koster Donna Koster Volunteer Sheila Yokers Sheila Yokers Volunteer Anne Minard Tom Schiavone Volunteer Margie Erhart Empty *Note: Anne Minard and Margie Erhart hiked out at Tanner, and Johanna Divine and Michael Whalen hiked in to take their places until Phantom Ranch. Table 5. October 3-20, 2003 Participant List Role Upper Half Lower Half Trip Coordinator / Project Leader Lori Makarick Lori Makarick Head Boatman / Trip Leader Jeri Ledbetter Jeri Ledbetter Boatman Larry Stevens Larry Stevens Boatman Alison Steen Matt Dunn Boatman Kim Crumbo Kim Crumbo Boatman Chris Louderback Kate Thompson Volunteer Matt Dunn John Sterling Crew Leader #1 Kate Watters Kate Watters Crew Leader #2 Kim Fawcett Kim Fawcett Volunteer / Crew Leader #3 Johanna Divine Anne Hadley Cook / Worker Simone Sellin Simone Sellin Volunteer Jessica Cortright Jessica Cortright Volunteer Scott Smith Scott Smith Volunteer Heather Millar Herman Griego Volunteer Kelly Watters Kelly Burke Volunteer Dave Gentempo Margie Erhart Table 6. October 29 - November 15, 2003 Participant List Role Upper Half Lower Half Trip Coordinator / Project Leader EMPTY Lori Makarick Head Boatman / Trip Leader Dan Hall Dan Hall Boatman Chris Louderback Chris Louderback Boatman Alison Steen Alison Steen Boatman Nicole Corbo Nicole Corbo Boatman Michael Whalen Rachel Schmidt NPS Rep / Volunteer Chad Olson Dave Gentempo Crew Leader #1 EMPTY Kate Watters Crew Leader #2 EMPTY Kim Fawcett Crew Leader #3 EMPTY Angela Sokolowski Cook / Worker EMPTY Simone Sellin Volunteer EMPTY Willow Nelson Volunteer EMPTY Chris Moore Volunteer EMPTY Steven Till Volunteer EMPTY Jessica Cortright Volunteer EMPTY Beach Huntsman Table 7. May 25-June 14, 2004 Participant List Role Upper Half Lower Half Trip Coordinator / Project Leader Lori Makarick Lori Makarick Head Boatman / Trip Leader Dave Edwards Kim Crumbo Boatman Kristin Huisinga Kristin Huisinga Boatman Kim Fawcett Kim Fawcett Boatman Jessica Cortright Jessica Cortright Crew Leader #1 Kate Watters Kate Watters Crew Leader #2 Steve Till Fred Phillips Cook Rachel Running Rachel Running Volunteer Wendy Hodgson Heidi Kloeppel Volunteer Frank Hays John Randall AWPF Representative / Volunteer Reuben Teran Amy Prince Volunteer EMPTY Maddie Tighe Prior to each trip, the project leader prepared itineraries, which were then reviewed and approved by park management. Poor weather conditions and additional time needed at specific sites necessitated the alteration of the itinerary on several occasions; however, in general, the well-designed project itineraries allowed ample time to complete project work. The final itineraries for each trip follow, with the exception of the October 2000 trip which did not have a formal itinerary to allow for flexibility in transect and photopoint installation. During each trip, there were only a few days of rain, with the exception of the October 2000 trip which occurred during extreme weather and flash flooding events. Many of the project areas are in narrow side canyons, which are subject to flash flooding. On rainy days, crews only worked in wide open canyons that would be safe during a flood event and minimized the use of herbicide. Table 8. October 2002 Itinerary Grand Canyon National Park / Grand Canyon Wildlands Council Tamarisk Eradication Trip #1 October 11-28, 2002 DATE CAMP RM PROJECTS 10/8-9 Food Pack - Simone, Larry, Kim F. & Lori 10/10 Lees Ferry Meet at 8:45am at Larry’s house in Flagstaff for departure. Once we are at Lees Ferry – rig the boats, have lunch, and spend time working on tamarisk treatment techniques. 10/11 North Canyon RM 20.5 R All people going downstream need to be at Lees Ferry by 7:30am for an 8:30am departure!!! We’ll get to camp late – 20 mile river day! Get all tools and supplies ready for early departure up North. 10/12 Buckfarm Canyon RM 41 R North Canyon First Redbud alcove Second Redbud alcove Tatahatso Wash 10/13 Kwagunt RM 56.2 R Buckfarm Bert's Canyon 10/14 Kwagunt RM 56.2 R Kwagunt 1/015 Carbon RM 64.7 R Carbon Canyon 10/16 Basalt RM 69.8 R Palisades Basalt 10/17 Nevills RM 75.6 L 74 mile wash Escalante 75 mile Creek 10/18 Grapevine RM 81.3 L Vishnu Creek 10/19 Cremation RM 87.2 L 85 mile spring Lonetree Canyon Clear Creek 10/20 Schist RM 96 L EXCHANGE DAY!!! Let's pick up the new folks and be heading downstream by noon. Orientation to the project for new folks, clean up coolers, organize tools, etc. 10/21 Slash/Parkins Camp RM 108 L Boucher Creek 10/22 Bighorn Wash RM 117 L Bighorn Wash 10/23 Stone Creek RM 132 R 122 Mile Lower Blacktail 10/24 First Chance RM 157.7 R 142 Mile Spring 10/25 No name RM 185.5 R Transit Day 10/26 Granite RM 209 L Transit Day 10/27 222 Mile RM 222 R Bessie's Camp Creek 212 R 10/28 Sus casitas TAKE OUT!!! Table 9. November 2002 Itinerary Grand Canyon National Park / Grand Canyon Wildlands Council Tamarisk Eradication Trip #2 November 8-25, 2002 Date Camp RM Projects 11/6 Food Pack - Simone, Kate and Kim 11/7 Lees Ferry – We’ll do dinner at VC or MC so bring money. Meet at 9am at Larry’s house in Flagstaff for departure (1705 N. San Francisco). Once we are at Lees Ferry – rig the boats, project orientation, etc. 11/8 Above Tiger Wash 26.3 L LAUNCH!!!!! All people going downstream need to be at Lees Ferry by 7:30am for an 8:30am departure!!! 11/9 Malgosa 57.5 R Malgosa 11/10 Malgosa 57.5 R Continue work on Malgosa 11/11 Lava Canyon 65.5 R Lava Canyon *CRF trip works with us 11/12 Lava Canyon 65.5 R Finish Lava! 11/13 Phantom Ranch 87.2 L Clear Creek *CRF folks will do the seedlings Lonetree 11/14 Trinity 91.6 R EXCHANGE DAY!!! Head downstream EARLY!!!! Really. Trinity 11/15 Boucher 96.7 L Finish Trinity in the morning Salt Creek (1 boat) Boucher 11/16 Waltenberg 112 R Boucher – continue with this canyon *CRF folks work with us! Waltenberg Canyon 11/17 Upper Blacktail 120 R Garnet Elves (may cancel this one depending on time) Upper Blacktail 11/18 Stone Creek 132 R Forster Stone *CRF folks will do the seedlings 11/19 Across from Deer 136.2 L Fishtail 148 Springs (L) 11/20 Ledges 151.5 R Matkatamiba (may cancel this on depending on time) 150 Mile 11/21 Fern Glen 168 R Spring above 152 at Ledges Fern Glen 11/22 Cove 174.3 R Stairway Cove Canyon – Lower Cove Canyon - Upper 11/23 Parashant 198.5 R TRANSIT Day 11/24 222 Mile 222 R TRANSIT and clean up day! 11/25 Sus casitas TAKE OUT! Table 10. October 2003 Itinerary Grand Canyon National Park / Grand Canyon Wildlands Council Tamarisk Eradication Trip #3 October 3-20, 2003 Date Camp RM Projects 10/1 Food purchase/pack and get boats loaded. Jeri/Matt will pack river equipment, Lori/Kim will pack tools/herbicide & deliver to Larry's, Simone/Jessica will be responsible for shopping and food. 10/2 Lees Ferry – We’ll do dinner at VC or MC. RIGGING DAY! Meet at 9am at Larry's house on N. San Francisco. Once at Lees Ferry – rig the boats, have lunch, and spend afternoon with project briefing. 10/3 Hot Na-Na area 16.4 L All people going downstream need to be at Lees Ferry by 7:30am for an 8:30am departure!!! Really. We will stop at Soap and re-treat the trees there (just to the boundary). 10/4 Buckfarm Canyon 41 R North Canyon (Team 1) First Redbud alcove (Team 2) Second Redbud alcove (Team 2) Tatahatso Wash (Team 2) 10/5 Kwagunt 56.2 R Buckfarm (Team 1) Bert's Canyon (Team 2) 10/6 Kwagunt 56.2 R Kwagunt 10/7 Carbon 64.7 R Carbon Canyon - just to narrows 10/8 Lava Chuar 65.5 R Lava Chuar 10/9 Lava Chuar 65.5 R More Lava Chuar 10/10 Nevills 75.6 L Basalt (Note - we'll have to prioritize today……) 74 Mile Wash (Team 1) Escalante (Team 1) 75 mile canyon (Team 2) 10/11 Cremation 87.2 L Vishnu (Team 1) 85 Mile Spring (Team 2) Clear Creek (Team 2) 10/12 Schist 96 L EXCHANGE DAY!!! Let's pick up the new folks and be heading downstream by 11am. No tamarisk work today - but orientation to the project for new folks, clean up coolers, organize tools, and full orientation / training. 10/13 Slash/Parkins Camp 108 L Boucher (Team 1) Tuna Creek (99 R) (Team 2) 10/14 Bighorn Wash 117 L Hakatai 111 R Bighorn Wash (re-check if time) 10/15 Galloway 131.8 R Specter 129 L (Team 1) Galloway (Team 2) 10/16 Fishtail 139 R Cranberry (Team 1) Fishtail, camp (Team 2) 10/17 Tuckup 164.5 R Tuckup 10/18 Parashant 198.5 R Transit Day 10/19 222 Mile 222 R Transit Day - See where others are camping, go low down. Start cleaning up supplies, coolers, etc. 10/20 Sus casitas TAKE OUT!!! Wakey wakey!!! Table 11. November 2003 Itinerary Grand Canyon National Park / Grand Canyon Wildlands Council Tamarisk Eradication Trip #4 October 29-November 15, 2003 Date Camp RM Projects 10/27 Food purchase / pack and get boats loaded. Dan will be responsible for packing equipment, Simone/Kim will be responsible for shopping and packing all food. 10/28 Lees Ferry – Dinner in the big town! RIGGING DAY! Meet at 9am at Can-ex. Drive to Lees Ferry – rig the boats. The upper portion of this trip will be dedicated to transit, so it will just be boatmen, 1 NPS representative. 10/29 Lone Cedar 23.7 L Transit Day 10/30 Eminence 44 L Transit Day 10/31 Carbon 64.5 R Transit Day 11/1 Cremation 87.1 L *Folks hiking in will arrive today by 3pm at Roy’s Beach – 4pm briefing / dinner / orientation. People can go over to Phantom after that for phone calls, etc. - but we will not have access to the bunkhouse or other facilities. Note- Hikers meet at 411 S. Taber in Williams at 9:30 for ride to South Rim. 11/2 Granite 93.4 L Trinity (Team 1) Salt (Team 1) Monument (everyone else) 11/3 94 Mile 94.3 R 94 Mile Creek 11/4 Slash Camp 108 Ruby Serpentine 11/5 Bighorn Wash 117 L Hotauta Garnet Bighorn Wash - if time 11/6 Forster 122.7 L Blacktail (Team 1) 122 Mile (Team 2) Forster (Team 2) 11/7 Stone 132 R Fossil (Team 1) 128 Mile (Team 1) Bedrock (Team 2) 11/8 Stone 132 R Stone Creek 11/9 Kanab Area 143 133 Mile Creek 142 Mile Spring 11/10 Ledges 151 R 148 Spring Matkatamiba 11/11 Last Chance 155.7 R 152 Springs Slimey Tick Last Chance 11/12 Cove 174 R Fern Glen Cove 11/13 202 Mile 202 R Transit Day - Photodocumentation if time 11/14 223 Mile 223 L Transit Day, Clean Coolers and Tools, etc. 11/15 YER HOMEYS Wakey wakey eggs and bay-key! Table 12. May-June 2004 Itinerary Grand Canyon National Park / Grand Canyon Wildlands Council Monitoring Trip #2 May 26-June 14, 2004 D te Ca R Proj 5 Lees F Meet at Larry’s house at 8:30am, finish packing, drive to Lees Ferry, rig trip have project orientat 6 19 Mi 19 L Soap C 7 Tatahatso W 37 North Canyon, Tatahatso W 8 Malg 57 First Redbud Alcove, Second Redbud Alcove, Buckfarm Canyon, B Canyon, Kwagunt Creek, Malgosa Can 9 Lava Can 65 Carbon Creek, Lava Can 0 Nev 75 Palisades Creek, 74 Mile Wash, Escalante Creek, 75 Mile C 1 Crema 87 Vishnu Creek, Lonetree Canyon, Clear Creek, 85 Mile Sp 1 Salt C 92 Trinity Creek, Salt C 2 Ross Whe 107 94 mile Creek, Boucher Creek, Tuna Creek, Serpentine Can 3 Ga 114 Hotauta Canyon, Hakatai Canyon, Waltenberg Can 4 Bighorn W 11 Garnet Canyon, Elves Ch 5 Blac 120 Bighorn Wash, Lower and Upper Blacktail Can 6 Randy’s R 126 122 Mile Creek, Forster Can 122 Forster Can 7 Gallo 131 128 Mile Creek, Specter Chasm, Bedrock Can 8 Ponc 13 Galloway Canyon, Stone Creek, 133 Mile C 9 Kanab C 143 Cranberry Canyon, Fishtail Canyon, 142 Mile Sp 0 No n 15 148 Springs, Matkatamiba Canyon, Spring above Ledges – 152 Mile, Sli Tick Canyon, Last Chance Cany 1 Below L 179 Tuckup Canyon, Fern Glen Canyon, Stairway Canyon, Lower Cove Can 2 Indian Can 206 Various Stops and Tra Mile C 216 209 Mile Canyon, Bessie's Camp Creek, 214 Mile C 4 Sus Ca TAKE OUT, DE-RIG and CLEAN UP!!!! c. Tamarisk control methods and conditions Each fall river trip was 18 days long and consisted of 16 people. The trip length allowed for sufficient time to access and work in canyons on the itinerary. The goal of the control work was to target 15+ tributaries per trip, totaling the 63 canyons over the 4 control trips scheduled during the contract period. Some project areas required follow-up visits to complete the initial control of the entire tamarisk population and with commitment to this large-scale project, NPS staff sought additional funding and support for the necessary retreatment work. The Grand Canyon National Park Foundation, the NPS’s Cooperative Conservation Initiative, the Colorado River Fund, Canyon Expeditions, Arizona Raft Adventures, Diamond River Outfitters, Arizona River Runners, and many individuals contributed valuable monetary, equipment and psychological support to this project. After incorporation of public comments into the Environmental Assessment / Assessment of Effect (EA/AEF) document, which is required under the National Environmental Policy Act (NEPA) and the National Historic Preservation Act (NHPA), project managers selected the final control methods. For this project crews used a combination of methods including mechanical and chemical. The project coordinator or field crew leader selected the appropriate method(s) for each project location based on site characteristics and weather conditions; a brief description of each method follows: Manual Removal This is the method used for seedlings and saplings in washes, streambeds, and non-sensitive areas. Crews used hand tools (i.e. picks, pulaskis, and shovels) to loosen the soil surrounding the plants and remove then the entire root system, or to at least below the root crown. Crews scatter the pulled plants on site, where they remain to decompose. Garlon Lance Injection The lance injector is a 1m long tool with four chambers. Small herbicide capsules (approximately 2cm long by 0.6cm in diameter) are placed inside the chambers, the lance is placed against the trunk of the tree, and as the top of the lance is pushed, the chamber opens and a capsule is inserted into the tree. The diameter of the trunk is used to determine the number of capsules inserted. The capsules are made of metal and should be removed after the herbicide gel inside the capsule is released into the tree, which typically take about 6 months. Girdle Method (a.k.a. Hack and Squirt) Following in the footsteps of Prince, this is the method formerly known as Hack and Squirt. With this method crews used hatchets and hand saws to cut downward into the water-conducting tissue (phloem) of standing trees and then applied the herbicide mixture directly into the cut with a hand-pressurized sprayer equipped with a coarse spray nozzle. On larger trees, two or more cuts were often necessary. Based on input from other professional tamarisk crews, project leaders modified this method to include a complete girdle around the trunk of the tree. Cut Stump Method Crews cut the tree trunks near ground level with handsaws and then applied a 25% Garlon4® herbicide and 25% penetrating oil (JLB oil) solution to the cut surface and the sides of the trunk to ground level. The tree’s phloem absorbs the mixture and transports it to the roots, with quick application increasing the effectiveness. Pressurized hand sprayers allow precision herbicide application with minimum overspray or drift risk. Crews extensively used this method alone, and in combination with girdling, achieving high rates of control success. Basal Bark Application With this method, crews treated the entire stem with Garlon4® (same mixture as above) from near ground level up to 1m, depending on the tree size. Crews applied the chemical mixture with hand held pressurized sprayers, which have small nozzles with coarse spray settings, allowing for direct spraying and minimal drift or overspray. This method is much less labor intensive, but is less effective on mature trees, so crews limited use of this method to smaller saplings and seedlings. Combination (a.k.a.combo) With this method, crews used a combination of girdling, cut stump and basal bark application. Crews primarily used the combination method in highly visible or sensitive areas. Mitigation Measures The following specific measures applied to all methods used for the project: • Debris was disposed of to minimize visual impact (i.e. off trail, out of the drainage, covering cut stumps). • Empty herbicide capsules were removed from trees in the year following treatment. • Cut stumps were hidden from view to the extent possible. • Soil was replaced and tamped down where manual removal was used to help minimize establishment of other invasive exotic species and to minimize visual impact. • Tree cuts were made on tree sides least visible to backcountry users. • When pruning, a minimal number of branches were cut to minimize visual impact. Much of the debris remains on site to decompose and provide habitat for wildlife. Crews minimized the visual impacts of the project through carefully placed cuts and girdles and the combination of control methods employed at each project site. After the first two control trips, project leaders evaluated the success of the various control methods, which helped ensure greater control success. Herbicide Use The herbicide used for control was Garlon4® (triclopyr based), which is a general use herbicide, in a mixture of 25% Garlon4® and 75% JLB oil. Garlon3a® was taken on each trip to use directly next to water, but crews did need to use this herbicide, which poses slightly higher safety risks to applicators but less risk to aquatic organisms. One quart stainless steel sprayers, pressurized with bicycle pumps, were the herbicide application tool. Pesticide certification is not required for Garlon® application; however, the park vegetation staff adopted the policy of having trained and certified applicators on site during application. During these trips, the project leader, all field crew leaders, and some of the volunteers possessed Arizona State pesticide certification. All project participants received herbicide orientation and training from the project leader. Project participants understood and abided by the established Personal Protective Equipment (PPE) requirements, the rules outlined in the safety plan for the project, and the job hazard analyses (JHAs) for exotic plant removal, herbicide application, boat travel, and backcountry camping. Rubber gloves, long sleeve shirts, long pants, and eye protection were part of the PPE necessary for herbicide applicators. Closed toe shoes, long pants, eye protection and leather gloves were the PPE required of all other project participants. Project leaders followed all information and instructions on the herbicide label. All herbicide containers were leak- and spill resistant. All application equipment and chemicals were stored in sealed ammunition cans or large silver boxes during transport on rafts, and all storage containers had the product's specimen label and the Material Safety Data Sheet (MSDS) clearly displayed underneath a waterproof plastic sheet. The MSDS contains fire and explosive hazard data, environmental and disposal information, health hazard data, handling precautions, and first aid information. All trip participants reviewed the MSDS with the project leader and understood the first aid instructions described on the MSDS. One boat contained all herbicide and application equipment, herbicide containers, and PPE disposal containers, isolated from food and personal items. d. Tamarisk project monitoring methods and conditions As stated in the monitoring plan, vegetation cover data were used to determine the project success. The plan called for vegetation transect data collection in at least 25% (16 tributaries), providing an adequate measure of change in cover percentages. The location selection process, complete prior to the October 2000 trip, was random. Preliminary stratification of the tributaries, based on preliminary survey data, ensured the inclusion of an adequate sample of canyons with greater then 50 tamarisk and less than or equal to 50 tamarisk in the overall design. The number of transects installed in each area was based on the extent of the tamarisk populations, with the goal of installing 1 to 3 transects in each area. The location of each transect was stratified so that populations of tamarisk would be bisected; therefore, the transect placement in each area was not random. Crews took Global Positioning System (GPS) readings and photographs at the start and end point of each 50m transect. The relocation of the transects was very easy and was accomplished with good maps that included the GPS points on satellite imagery along with a description of the transect. Each transect was a 50m line, with crews using the point intercept method at every 0.5m (for a total of 100 hits) along the line. Crews used 2m long, 1cm in diameter pole as the point, with all vegetation, litter, brush, bare ground or water touching the point recorded. With this technique it is important to understand that it is possible to have greater than 100% cover when all the species are added together since there are often more than 100 total hits along each transect line. The following general categories and their attributes were used in data collection: • Rock – Pieces of rock greater than 2cm to boulders or bedrock/schist • Bare Ground - No cover on the ground to rock less than 2cm in diameter • Brush - Dead vegetation larger than 2cm in diameter - primarily dead and down tamarisk in the transects • Litter - Dead vegetation smaller than 2cm in diameter - primarily leaf litter and grass growth • Soil Crust - Microbiotic soil layers • Water - Differentiated into perennial and ephemeral e. Analysis of methods Although current scientific literature documents successful control methods for tamarisk, refinement to the methods occurred during the work in Grand Canyon. Please refer to Appendix A for examples of methods and sample photographs, and to the fall 2002 and 2003 reports for preliminary discussion of methods. Crews used the Garlon lance injection method in 2002. Some benefits include increased safety for applicators, since there is less likelihood of contact with herbicide, and rainy conditions do not preclude the use of this method. When crews revisited Clear Creek in March 2003, the injected trees were still alive. Crews removed the capsules, and cut the trees. During 2003, 75 mile canyon flash flooded, and during the fall revisit, some of the injected trees were not located and likely had washed down the canyon. This was a significant concern since crews could not retrieve the empty capsules. Overall, crews found that the control effectiveness was low with this method and did not use it in 2003. However, park staff will further test this method in a controlled and easily visited setting and make a final determination about future use. Crews used the hack and squirt method in 2002, but based on the control results and input from the Lake Mead Exotic Plant Management Team on the March 2003 trip, project leaders altered the technique prior to 2003 and renamed it the girdle method. Crews determined that it is necessary to cut into the outer bark (about 1cm deep) all the way around the tree trunk, leaving no section uncut. The cut can be lower to the ground that initially planned. Another key to the success is to spray the tree trunk from the cut to the ground in addition to herbicide application into the cut. Crews still use this method on scattered individual trees, but it remains difficult to use as the sole method in dense stands. Crews now extensively use the cut stump method alone, and in combination with girdling, since the control results have been the highest. It is also easiest to retreat those areas. Crews did notice that on previously cut mature trees, the regrowth tended to be a basal cluster affectionately named an “afro”. The retreatment method for the afros was basal application and no additional cutting was necessary. IV. Results a. Results of project implementation With AWPF funding the NPS and GCWC, in cooperation with hundreds of volunteers, treated 70,616 tamarisk trees in Grand Canyon National Park. Complete tamarisk treatment data for this project are found in Tables 13 and 14, and displayed in Figures 1, 2 and 3. Initial treatment work included 47,244 seedlings, 16,998 saplings, and 6,374 mature tamarisk trees, with a total of 1,406 saplings and 1,119 mature trees requiring some form of re-treatment, and 2,289 new seedlings pulled in previously treated project areas. The total tamarisk canopy cover removed from the project sites was 40,804 square meters. In total, crews removed tamarisk from 1819 hectares (4496 acres) of infested land in 70 separate project locations. The approved project list included tamarisk control in 63 project areas, which was exceeded during project completion. The only project areas in which crews did not implement tamarisk control work by the time of this report were along Bright Angel Creek and in 150 Mile Canyon. However, crews supported by NPS funds will initiate tamarisk control along Bright Angel Creek on September 1, 2004. With AWPF project funding in the spring of 2004, crews installed 15 photopoints along Bright Angel Creek to prepare for the work. In such a highly visited area, Lori Makarick, the NPS coordinator for this project, decided to delay the implementation of work in that area until the fall, when visitation will be slightly decreased and large crews will have access to the NPS bunkhouse, also allowing additional project leaders to be trained and hired for such an extensive area. Crews did not visit 150 Mile Canyon due to logistical constraints and poor weather conditions during project implementation. While the approved tributary list for this contract includes these areas, this decision displays the NPS commitment to this project, and work will be well-underway prior to the end of this contract although numbers are not included in this report. The amount of herbicide used, a mixture of 75% JLB Oil to 25% Garlon 4®, was surprisingly low over such vast acreage. Herbicide applicators used a total of 62.5 mixed gallons on all trips combined; this is equivalent to 15.625 gallons of Garlon4 concentrate and 46.875 gallons of JLB Oil. The skilled applicators and the direct target application methods used led to such a small amount of herbicide applied. Crews completed follow-up control work in the majority of the project areas, yet in several areas, the preliminary control work required much more labor than predicted based on the tamarisk surveys. The following sites, due to extensive populations, weather, or lack of time, required additional visits and control implementation: • Kwagunt Creek • Carbon Creek • Monument Creek • 94 Mile Creek • Boucher Creek • Tuna Creek • Fossil Canyon • 128 Mile Creek • Bedrock Canyon • 142 Mile Springs • 148 Mile Springs • Stairway Canyon • Cove Canyon A large component of this project is long-term monitoring. On the first river trip (October 2000) participants installed the majority of the monitoring components. The components include vegetation transects and photopoints. On the fall 2002 and 2003 trips, crews installed photopoints in additional project areas, for a total of 376 photopoints and reference points installed. Please refer to the monitoring plan for the overall design and implementation scheme. Appendix B, Project Photodocumentation, contains a complete set of the project photodocumentation laid out for future field monitoring efforts, including pre- and post-removal photographs and photographs of the photopoints. Appendix C, Project Photodocumentation Summary Table, includes the summary data for all of the photopoints. Appendix A, Representative Project Photographs, includes examples of the various methods used during project implementation. Appendix D, Monitoring Transect Descriptions, contains descriptions of each of the 22 vegetation transects and Appendix E, Monitoring Transect Summary Data for 2000 and 2004, includes all of the data pre- and post-removal transect data. The results from the transect data showed tamarisk reduction by 100% from 2000 (before tamarisk removal) to 2004 (after tamarisk removal) in 20 of the 22 transects surveyed in canyons of Grand Canyon National Park (Table 15). Carbon 3 transect showed a 93% reduction rate and Last Chance 1 showed a 65% reduction rate in tamarisk from 2000-2004. For all 22 transects combined, the percent frequency of tamarisk before removal (2000) decreased 34-fold when transects were surveyed after removal (2004) (Figure 4). There was 35-fold higher mean tamarisk hits on the 22 combined transects before the removal (2000) than after the removal (2004) (t= 5.143, df= 21, p<0.0001, Figure 5). The transect data also revealed that rock and bare ground were the most frequently occurring substrate type for the 22 transects combined in both 2000 (51%), and 2004 (61%) (Figure 6). The total vegetation hits in the combined 22 transects decreased by two-fold from 2000 to 2004. This reduction in total vegetation hits from 2000 to 2004 may be due to tamarisk removal, since tamarisk composed of 56% of the total vegetation of the combined 22 transects in 2000 and only 3% of the total vegetation in 2004. When vegetation was categorized by growth form and combined, the data revealed that trees occurred most frequently (59%) in 2000 and grass occurred most frequently (43%) in 2004 (Figure 7). Again, the reduction in the occurrence of trees on the transects from 2000 to 2004 is likely due to tamarisk removal, a sign of success. A complete vegetation list for the species detected on the individual transects in 2000 and 2004 is in Appendix E, Monitoring Transect Summary Data for 2000 and 2004. Appendix F, Plant List Summary Table for Selected Canyons, contains more complete plant species list for a subset of the project areas. Appendix G, Plant Lists for Canyons with Transects, contains complete plant species lists for a subset of the canyons with transects. b. Graphs, charts and tables pertaining to results Table 13. Tamarisk Treatment Totals Treatment Method Tree Size Canyon Name Pull Inject Combo Girdle Basal Bark Cut Stump Seedling Sapling Mature Cover (m2) Area Infested (sq. meters) 105 Mile Canyon R 0 0 0 0 0 17 0 9 8 40 23200 122 Mile Creek R 2 0 0 10 0 3 0 3 12 19 96437 128 Mile Creek R 426 0 0 0 0 214 453 85 102 356 215212 133 Mile Creek 3 0 0 0 0 56 4 20 35 122 90456 142 Mile Spring 0 0 0 2 0 12 0 5 9 103 32224 148 Spring Above Matkatamiba 0 0 5 1 0 21 0 17 10 88 4463 152 Springs (combined with Ledges) 10 0 0 0 0 72 13 52 17 31 0 1st Redbud Alcove 0 0 0 0 0 49 16 27 6 62 18357 209 Mile Canyon R 8 0 0 0 5 155 9 109 50 393 124211 214 Mile Creek 3 0 0 0 0 40 1 32 10 62 59421 2nd Redbud Alcove 0 0 0 1 0 10 1 6 4 29 52663 75 Mile Creek 261 31 0 0 0 4 267 23 6 74 604040 85 Mile Spring 7 0 0 0 0 40 12 30 5 19 84108 91 Mile Canyon R 0 0 0 0 0 42 0 26 16 125 106260 94 Mile Canyon 67 7 0 0 0 662 41 439 256 1598 1110883 Basalt Canyon 4096 0 0 13 0 105 4093 57 64 452 470046 Bedrock Canyon 89 0 0 0 0 496 126 289 170 935 377162 Bert's Canyon 0 0 0 1 0 14 4 4 7 16 219823 Bessie's Camp Creek 0 0 0 15 0 13 1 9 18 127 60266 Bighorn Wash 193 0 0 52 0 19 223 21 20 135 66457 Blacktail Canyon - Upper 202 0 1 0 0 239 148 267 27 219 2754 Boucher Creek 5098 0 36 99 722 4757 7603 2424 685 3095 143133 Buckfarm Canyon 3 0 0 0 0 51 11 21 22 102 946707 Carbon Creek 1 0 0 18 0 208 5 49 173 1236 367949 Clear Creek 616 36 0 2 23 171 711 114 23 246 227837 Cove Canyon - Lower 33 19 0 192 0 186 7 214 209 853 180895 Cove Canyon - Upper 420 0 2 4 0 6 418 5 9 117 0 Cranberry Canyon 0 0 0 0 0 28 0 21 7 26 44069 Elves Canyon 147 0 0 0 0 49 148 18 30 287 70358 Escalante Creek 0 0 0 20 0 1 0 6 15 52 79750 Fern Glen Canyon 0 0 0 0 0 2 0 1 1 2 40721 Fishtail Canyon 0 0 2 2 0 5 0 5 4 35 47349 Forster Canyon 26 0 1 0 0 126 20 93 40 240 112792 Fossil Canyon 29 0 0 0 0 18 28 12 7 69 248531 Galloway Canyon 343 0 2 0 0 1150 641 462 392 1582 542214 Garnet Canyon 177 0 0 4 0 239 194 154 72 286 153778 Hakatai Canyon 8 0 0 0 0 83 8 54 29 118 33937 Hermit Creek 1870 0 0 0 0 1080 1935 728 287 1545 1064122 Hotauta Canyon 3 0 0 0 0 72 6 39 30 67 276634 Kwagunt Creek 503 43 12 71 145 3178 1748 1628 576 4915 1731154 Last Chance Spring 151 0 0 0 0 92 162 74 7 46 16635 Lava Chuar 100 0 59 33 174 2820 642 1790 754 5814 2340319 Ledges Spring 192 0 1 14 0 45 179 53 20 132 16536 Lonetree Canyon 53 0 0 14 0 214 146 109 26 233 106226 Malgosa Canyon 0 0 0 30 0 12 2 7 33 246 276535 Matkatamiba Canyon 1626 0 5 1 0 43 1439 224 12 1100 71939 Mohawk Canyon 6824 0 0 0 0 0 6824 0 0 750 89497 Monument Creek 2101 0 0 0 3115 5567 6992 3490 301 3014 484412 Monument Spring 50 0 0 0 0 0 50 0 0 10 54850 North Canyon 14 0 0 32 0 30 26 8 42 209 116095 Palisades Creek 0 0 0 0 0 20 3 2 15 59 162566 Rider Canyon 184 0 0 1 2 77 231 25 8 131 212736 Ruby Canyon 0 0 0 0 0 9 0 1 8 0 57827 Saddle Canyon 21 0 0 0 0 46 0 67 0 48 376193 Salt Creek 15 0 0 0 0 27 34 5 3 22 114105 Salt Creek Spring 20 0 0 0 0 0 20 0 0 5 154711 Serpentine Canyon 2 0 0 0 0 102 2 57 45 110 81984 Shinumo Creek 66 0 0 3 31 55 110 29 16 16 141583 Slimey Tick Canyon 2031 0 0 0 0 92 1919 188 16 103 96210 Soap Creek 0 0 0 0 3 40 10 10 23 56 127863 South Bass 2 0 0 0 0 0 0 2 0 1 28173 Specter Chasm 7 0 0 0 0 70 8 35 34 118 402022 Stairway Canyon 2 0 1 0 0 57 6 34 20 136 57577 Stone Creek 4289 0 0 0 103 2134 5467 1035 24 1277 576951 Tatahatso Wash 0 0 0 2 0 8 4 4 2 32 21042 Trinity Creek 44 0 0 0 0 301 137 161 47 261 263089 Tuckup Canyon 839 0 0 0 0 5 807 33 4 5 132248 Tuna Creek 31 0 5 0 14 625 241 344 90 878 84460 Unbar Creek 396 0 0 0 1 399 498 150 148 1327 971344 Upper Redbud 9 0 0 0 0 31 9 2 29 116 11461 Vishnu Creek 7 0 0 40 0 165 83 70 59 351 358507 Waltenberg Canyon 12 0 0 0 0 8 9 5 6 11 57944 NEW TREATMENT TOTALS 33732 136 132 677 4338 26787 44955 15592 5255 36495 18194013 TOTAL NUMBER TAMARISK TREATED 65802 Table 14. Tamarisk Retreatment Totals Treatment Method Tree Size Canyon Name Pull Inject Combo Girdle Basal Bark Cut Stump Seedling Sapling Mature Cover (m2) 122 Mile Creek R 0 0 0 0 0 4 0 0 4 0 128 Mile Creek R 300 0 0 0 0 35 317 10 8 15 142 Mile Spring 0 0 0 0 0 4 0 0 4 21 148 Spring (Above Matkatamiba R) 3 0 0 0 0 14 0 1 16 59 1st Redbud Alcove 0 0 0 0 0 2 0 0 2 1 75 Mile Creek 7 0 0 0 0 1 0 6 2 9 85 Mile Spring 1 0 0 0 2 2 1 3 1 1 94 Mile Canyon 1 0 0 0 0 4 0 1 4 2 Basalt Canyon 0 0 0 0 1 21 0 8 14 85 Bessie's Camp Creek 0 0 1 0 0 7 0 3 5 148 Bighorn Wash 0 0 0 0 0 33 0 19 14 59 Blacktail Canyon - Upper 0 0 0 0 3 7 0 3 7 8 Boucher Creek 135 0 61 0 34 347 206 203 168 347 Buckfarm Canyon 0 0 0 0 0 1 0 1 0 1 Carbon Creek 1 0 0 0 0 8 0 2 7 25 Clear Creek 0 0 0 0 0 21 0 16 5 23 Cove Canyon - Lower 11 0 0 22 1 148 13 18 151 945 Cove Canyon - Upper 2 0 0 0 0 6 2 1 5 12 Fern Glen Canyon 89 0 0 0 0 0 89 0 0 4 Forster Canyon 0 0 0 0 0 60 2 43 15 42 Garnet Canyon 4 0 0 0 0 58 0 43 19 49 Hotauta Canyon 0 0 0 0 0 28 1 5 22 12 Kwagunt Creek 12 0 1 0 1 408 46 238 138 624 Lava Chuar 67 0 10 9 601 874 487 647 427 1081 Ledges Spring 0 0 0 0 0 4 0 1 3 1 Monument Creek 155 0 0 0 0 123 178 98 2 20 North Canyon 3 0 0 0 0 18 2 2 17 159 Ruby Canyon 0 0 0 0 0 11 0 0 11 6 Salt Creek 0 0 0 0 0 3 0 2 1 2 Slimey Tick Canyon 14 0 0 0 0 0 14 0 0 1 Soap Creek 0 0 0 0 0 7 0 1 6 3 Specter Chasm 313 0 0 0 0 0 311 2 0 5 Stairway Canyon 68 0 0 0 0 0 68 0 0 8 Stone Creek 547 0 0 0 0 8 540 13 2 334 Tatahatso Wash 0 0 0 0 0 1 0 0 1 7 Trinity Creek 0 0 0 0 0 15 0 10 5 8 Vishnu Creek 6 0 0 0 0 40 7 6 33 181 Waltenberg Canyon 5 0 0 0 0 0 5 0 0 1 RETREATMENT TOTALS 1744 0 73 31 643 2323 2289 1406 1119 4309 TOTAL NUMBER TAMARISK RETREATED 4814 Figure 1. Tamarisk Control by Size Tamarisk Treatment by Size Class 47244 16998 6374 0 10000 20000 30000 40000 50000 60000 Seedling Sapling Mature Size Class Number of Trees Figure 2. Tamarisk Control by Method Tamarisk Treatment by Method 35476 136 205 708 4981 29110 0 5000 10000 15000 20000 25000 30000 35000 40000 Pulled Inject Combo Cut / Girdle Girdled Basal Bark Cut Stump Method Number of Trees Figure 3. Tamarisk Retreatment by Size Class Total Tamarisk Retreated 0 10000 20000 30000 40000 50000 Seedling Sapling Mature Tamarisk Size Classes Number of Trees New Treatment Retreatment Table 15. Percent Tamarisk Reduction Rate 2000 to 2004 Transect Reduction Rate (%) Soap 1 100 Carbon 1 100 Carbon 2 100 Carbon 3 93 Lava Chuar 1 100 Lava Chuar 2 100 Lava Chuar 3 100 Serpentine 1 100 Serpentine 2 100 Hotuata 1 100 Waltenberg 1 100 Garnet 100 Elves Chasm 100 Bighorn Wash 100 Blacktail 100 Forester 100 Specter 1 100 Specter 2 100 Cranberry 1 100 Last Chance 1 65 Cove 1 100 Cove 2 100 Figure 4. Frequency of Tamarisk Before and After Treatment 0 2 4 6 8 10 12 14 16 18 20 2000 (Before) 2004 (After) Date % Frequency of Occurrence The frequency of tamarisk for total number of hits on 22 combined transects for before (2000) and after (2004) tamarisk removal for canyons in Grand Canyon National Park. Figure 5. Mean Number of Tamarisk Before and After Treatment 2000 2004 Date Mean Number of Tamarisk 0 5 10 15 20 25 30 t= 5.143 df= 21 p< 0.0001 Mean number of tamarisk hits on 22 combined transects for 2000 (before tamarisk removal) and 2004 (after tamarisk removal) for canyons in GRCA. Error bars indicate standard error. Figure 6. Substrate Frequency Before and After Treatment 0 10 20 30 40 50 60 70 Total Vegetation Rock & Bare Ground Brush Soil Crust Litter Water Substrate Type Frequency 2000 2004 Substrate frequency for hits on 22 transects combined in 2000 (Pre-tamarisk removal) and 2004 (Posttamarisk removal) for canyons in Grand Canyon National Park. All vegetation detected on the transects is combined for total vegetation. Figure 7. Percent Occurrence Growth Form Before and After Treatment 0 10 20 30 40 50 60 70 Tree Shrub Herb Grass Moss Growth Form % Occurrence 2000 2004 Percent occurrence of growth forms for total vegetation hits on the 22 transects combined in 2000 (Pretamarisk removal) and 2004 (Post-tamarisk removal) for canyons in Grand Canyon National Park. V. Discussion and Conclusions a. Discussions and conclusions of results Grand Canyon National Park and Grand Canyon Wildlands Council staff are extremely satisfied with the results of this large-scale invasive plant management and tributary restoration project. Preliminary survey results revealed 22,589 tamarisk trees within the scope of this project. During project implementation, crews removed 70,616 tamarisk trees from the project area, covering much more ground than project coordinators thought was possible. The retreatment data from the project area shows that only 7% of the initially treated trees required follow-up treatment (Table 16). With the refinement of control techniques, project coordinators anticipate the retreatment needs declining in the future as this project expands. Table 16. Tamarisk Retreatment to Date – Percentage by Size Class Size Class # Tamarisk Retreated # Initial Tamarisk Treated % Retreated Seedling 2289 44955 5.091758 Sapling 1406 15592 9.017445 Mature 1119 5255 21.29401 Total 4814 65802 7.315887 The project monitoring design objectives were to display: 1. How successful removing tamarisk from side canyons is in reducing colonization of tamarisk, and 2. How much and to what extent the native plant communities in side canyons recover and benefit from this removal. An acceptable goal was to decrease the tamarisk cover to 5% or less of the pre-management tamarisk cover in the project areas. The results from the transect data showed tamarisk cover and frequency reduction by 100% from 2000 (before tamarisk removal) to 2004 (after tamarisk removal) in 20 of the 22 transects installed in project areas. Only 2 canyons showed a lower rate of tamarisk cover reduction, one with 93% and the other with 65%. The project area with only a 65% cover reduction is a spring in the main Colorado River corridor and due to restrictions in the EA/AEF the project coordinator decided not to remove the tamarisk below the old high water line. Overall, the transect data reveal a very successful project. The project photographs provide supplemental support for the success of this project, with remarkable before and after tamarisk removal changes to these valuable riparian systems. Public support for this project remains extremely high, another sign of a successful project. A vast cadre of individuals continues to want to donate their time and energy to this project. The project has been documented in the media, with the valuable support from the Arizona Water Protection Fund noted (refer to Appendix H). With Grand Canyon harboring some of the last remaining desert riparian areas, this project has gone a long way in protecting and restoring these valuable ecosystems. b. Discussion and conclusions about results with relation to related literature. Tamarisk is an aggressive species that has invaded riparian areas throughout the southwest and often dominates these areas by out-competing the native vegetation. In addition to forming monotypic stands, biologist have identified many other undesirable attributes for tamarisk, including 1) crowding out native stands of riparian and wetland vegetation (Stevens 1990); 2) increasing the salinity of surface soil rendering the soil inhospitable to native plant species (Hem 1967); 3) providing generally lower wildlife habitat value than native vegetation (Anderson et al.1977, Engel-Wilson and Ohmart 1978, Kasprzyk and Bryant 1989); 4) drying up springs, wetlands, riparian areas and small streams by lowering surface water tables (Robinson 1965, Weeks et al. 1987); 5) widening floodplains by clogging stream channels (Robinson 1965); 6) increasing sediment deposition due to the abundance of tamarisk stems in dense stands (Everitt 1980); and 7) using more water than comparable native plant communities (Carpenter 1998). Because non-native plants have become an increasing problem in native riparian habitats, especially in the southwest, the development and implementation of weed management plans have become priorities in order to control non-native species invasion and prevent their introduction. The National Park Service (1990) outlined and defined five control strategies for invasive weeds, including: cultural, biological, physical, genetic, and chemical (herbicides). Later, the Nature Conservancy outlined five methods of effective tamarisk control, including: 1) applying herbicide to foliage of intact plants; 2) removing aboveground stems by burning or mechanical means followed by foliar application of herbicide; 3) cutting stems close to the ground followed by application of herbicide to the cut stems; 4) spraying basal bark with herbicide; and 5) digging or pulling plants (Carpenter 1998). The appropriate method is selected based on the size of the area of removal, chemical restrictions, native species presence, surface water presence, and available funding. The most effective method for large monotypic stands of tamarisk (>2 hectares) is a foliar application of imazapyr (Arsenal®) herbicide to the intact plants or burning or cutting plants followed by foliar application of imazapyr or triclopyr (e.g. Garlon4® or PathfinderII®) to the resprouted stems (Carpenter 1998). This combination of methods has proven successful for large stands of tamarisk occurring in Afton Canyon, California (Egan et al. 1993), Anza-Borrego Desert State Park, California and Picacho State Recreation Area, California (Jorgensen 1996). However, the burn method by itself has not been successful because burning creates open areas which enables tamarisk to aggressively establish and out compete fire-intolerant native plants. Therefore, the cut-stump/herbicide method provides the most effective tamarisk control over long periods of time. For modest-sized areas (< 2 hectares), the combination of cut-stump (physical) and herbicide (chemical) controls have shown to be the most effective strategy for tamarisk control (Neill 1990, Egan et al. 1993, Hughes 1996, and Carpenter 1998). The cut-stump method involves cutting individual tamarisk plants as close to the ground as possible, and immediately applying the triclopyr based herbicides (e.g. Garlon4®, Garlon3a® PathfinderII®) to the cambium ring. Neill (1990, 1996) found that herbicides with triclopyr, appear to be the best choices for killing tamarisk due to higher phytotoxicity, low toxicity to humans, lack of restriction, and cost comparable to other herbicides when diluted as directed. The expected mortality with these herbicides is 95%, with lower mortality probably being the result of not cutting close enough to ground level and/or not treating the circumference of the stump completely (Neill 1990, 1996). Fall is the most effective time to treat tamarisk with this methods since trees are not producing seeds, entering dormancy and transferring reserves to their roots. This method was successfully applied in the Coachella Valley Preserve in California over a 5 year period that resulted in removing tamarisk from 7 ha. (17.5 acre) of wetland that had greater than 80% tamarisk cover over 70% of the wetland (Martin 2001). Digging or pulling plants alone may be effective if the whole root mass is removed, otherwise resprouting is inevitable. Cutting tamarisk with no follow-up will not be successful, however multiple cuttings or burnings may kill the root system. (Luttrell 1983). Burke (1990) found that scraping a site along the shore of Lake Mead with a bulldozer killed some tamarisk plants, however many resprouted from roots that remained in the soil. The primary methods used for the tamarisk removal effort in tributaries of Grand Canyon National Park included: manual removal for seedlings and the cut-stump/herbicide treatment for larger trees. These methods followed what the NPS identified as effective control strategies for invasive weeds, including physical (manual removal and cut-stump) and chemical (herbicide) control (NPS 1990). Also, because the proposed area of tamarisk removal in the selected tributaries was usually <2 hectares, tamarisk was integrated with native species in many tributaries, and the access into the tributaries was limited, the cutstump/ herbicide method outlined by The Nature Conservancy (Carpenter 1998) appeared to be the most favorable option. Crews conducted removal trips in October and November in order to coincide with the most effective time to remove tamarisk. The results reveal that tamarisk was successfully reduced, and in many cases effectively removed, in 70 tributary canyons of Grand Canyon National Park. The cut-stump/herbicide method is very controlled, which is important for ecological systems that may have endangered or rare species present, such as MacDougall’s flaveria (Flaveria macdougalii), southwestern willow flycatcher (Empidonax traillii extemis), and the Kanab ambersnail (Oxyloma kanabense) which occur or have been known to occur in Grand Canyon tributaries. Using these methods, herbicide application was limited and localized, preventing the herbicide from contaminating surrounding riparian vegetation, soil, and water. The Bitter Lake National Wildlife Refuge in New Mexico has also successfully managed small areas of tamarisk with the cut-stump/herbicide method in areas with endangered species present (McCown 1998). Overall, this project not only successfully controlled tamarisk in 70 project areas, but also ensured the continued protection of valuable ecosystems and overall biodiversity within Grand Canyon National Park. VI. Management Recommendations a. Overview of management options During the implementation of this project, crews utilized and perfected tamarisk control methods in 70 areas within GCNP. Project leaders should continue to utilize these control and monitoring results to further refine project implementation, and they should continue to visit vegetation transects and project photopoints for a 10 year period. The National Park Service (NPS) has an affirmative responsibility to protect and preserve the resources located within its units. NPS Management Policies require park managers “to maintain all the components and processes of naturally evolving park ecosystems, including the natural abundance, diversity, and genetic and ecological integrity of the plant and animal species native to those ecosystems” (NPS 2001b). Park managers are directed to give high priority to the control and management of exotic species that can be easily managed and have substantial impacts on the Park’s resources (NPS 1985, NPS 2001b). This project verifies that the control of tamarisk in the park’s side canyons and tributaries is indeed feasible. This project has set back the invasion of tamarisk into project areas by several decades. However, this project requires continued maintenance since the seed source remains in the river corridor remains. A vast body of literature documents the impacts that tamarisk has on southwestern ecosystems, and Stevens (2001) summarized the impacts and ecology of the species. Since control is feasible and tamarisk poses a substantial impact on the resources located within GRCA, park management should continue and expand this work into other project areas within the park. Park management and the public have been very supportive of this project, and with continued documentation and successful implementation, the support should remain strong. b. Management recommendations and justification The EA/AEF for this overall project included three phases of tamarisk management and tributary restoration. The work completed under this contract is Phase I of the overall project. With Phase I successfully complete, funding should be sought to continue this valuable project and expand into Phase II and Phase III project areas. The EA/AEF for this project states that the park will commit to the follow up control necessary for Phase I project sites, and this work (hand pulling seedlings) should be integrated into the overall resource management in the park. After completion of this report, NPS and GCWC staff should summarize the results and prepare articles for both internal NPS publications and peer-reviewed journals. The NPS should continue to visit re-read the vegetation transects every 3 years and retake photographs every year for a minimum of 10 years. NPS staff should continue to recruit volunteers to assist with the follow-up maintenance needs (i.e. seedling pulling). The NPS should share the project mapping data by displaying the maps on the Park’s website. The funding provided by the AWPF has been essential to getting this project off the ground and protecting and restoring the park’s valuable riparian ecosystems. The AWPF was very understanding of the delays in the first task, and allowed the project timeline to be altered to incorporate the time needed to acquire all of the compliance and permits necessary to initiate the project. The partnership between GCNP and the GCWC has been integral to the success of the project, and all parties involved are commended for their dedication. The primary recommendation at this point is to continue the work, and to expand the project to include all of the tamarisk populations in the side canyons and tributaries of the park. VII. Literature Cited Anderson, B. W., A. Higgins, and R. D. Ohmart. 1977. Avian use of saltcedar communities in the Lower Colorado River Valley. USDA Forest Service, General Technical Report RM-43:128-136. Brown, B.T., K.A. Butterfield, R.R. Johnson, and M.S. Moran. 1980. Pp. 422-432 in: Proceedings of the Second Conference on Scientific Research in the National Parks, Volume 7: Ecosystem Studies. An Inventory and Classification of Surface Water Resources in Grand Canyon National Park, Arizona. USDI, National Park Service, Washington, DC. Burke, W. J. 1990. Tamarisk and its control at Lake Mead National Recreation Area. Pp. 17-19 in: M. R. Kunzmann, R. R. Johnson and P. S. Bennett (eds.) Tamarisk control in southwestern United States. Proceedings of Tamarisk Conference, University of Arizona, Tucson, AZ, September 23-3, 1987. Special Report No. 9. National Park Service, Cooperative National Park Resources Studies Unit, School of Renewable Natural Resources, University of Arizona, Tucson, AZ. Carpenter, A. T. 1998. Element stewardship abstract for Tamarix ramosissima Ledebour Tamarix pentandra Pallas Tamarix chinensis Loureiro Tamarix parviflora De Candolle Saltcedar. R.A. Robison and J.M. Randall (eds), The Nature Conservancy, Tamarisk Land Stewardship Consulting, Boulder, CO. Christensen, E.M. 1962. The rate of naturalization of Tamarix in Utah: Am. Midland Naturalist. 68(1): 51-57. Duncan, K.W. 1996. Saltcedar and Native Species in New Mexico. Presentation at Saltcedar Management and Riparian Restoration Workshop, Las Vegas, NV. September 1996. Egan, T.B., R.A. Chavez, and B.R. West. 1993. Afton Canyon saltcedar removal first year status report. In: L. Smith and J. Stephenson (tech. cords.). In: Proceedings of the Symposium on Vegetation Management of Hot Desert Rangeland Ecosystems. Phoenix, AZ. Engel-Wilson, R. W. and R. D. Ohmart. 1978. Floral and attendant faunal changes on the lower Rio Grande between Fort Quitman and Presidio, Texas. Pp. 139-147 in: Proceedings of the National Symposium for Protection and Management of Floodplain Wetlands. Everitt. B. L. 1980. Ecology of saltcedar – a plea for research. Environmental Geology 3:77-84. Grand Canyon Wildlands Council. 2003. Biological inventory and assessment of ten South Rim springs in Grand Canyon National Park: Final report. National Park Service Contract WPF-230. Submitted to Grand Canyon Science Center, Grand Canyon National Park, Grand Canyon, Arizona. Hem, J. D. 1967. Composition of saline residues on leaves and stems of saltcedar (Tamarisk pentandra Pallas). Geological Survey Professional Paper 491-C. U. S. Geological Survey, Reston, VA. Hughes, D. 1996. Restoring native riparian vegetation. In: Desired future conditions for southwestern riparian ecosystems: bringing interests and concerns together. General Technical Report RMGTR- 272. USDA, Forest Service, Fort Collins, CO. Kasprzyk, M. J. and G. L. Bryant. 1989. Results of biological investigations from the lower Virgin River vegetation management study. Bureau of Reclamation, Boulder City, NV. 75 pp. Luttrell, C. 1983. Tamarisk control study. Unpublished report. Lake Mead National Recreation Area, Boulder City, NV. Johnson, R.R., C.D. Ziebell, D.R. Patton, P.F. Fottiott and R.H. Hamre (eds). 1985. Riparian ecosystems and their management: reconciling conflicting uses. General Technical Report RM-120. USDA Forest Service. Jorgensen, M.C. 1996. The use of prescribed fire and mechanical removal as means of control of tamarisk trees. Pp. 28-29 in DiTomaso, J.M. and C.E. Bell, eds. Presentation at Saltcedar Management Workshop, Rancho Mirage, CA. Martin, T. 2001. A success story tamarisk control at Coachella Valley Preserve, Southern California. The Invasive Species Initiative, Nature Conservancy Report. McCown, C. 1998. Riparian restoration in the arid American west: reversing the spread of tamarisk. Restoration and Reclamation Review 1: 1-4. National Park Service. 2001a. Director’s Order #12: Conservation Planning, Environmental Impact Analysis, and Decision-Making. USDI, National Park Service, Washington, DC. National Park Service. 2001b. National Park Service Management Policies. USDI, National Park Service, Washington, DC. National Park Service. 1995. General Management Plan, Grand Canyon National Park. USDI, National Park Service, Denver Service Center, Grand Canyon, AZ. National Park Service. 1995. Grand Canyon National Park Strategic Plan. Grand Canyon National Park. USDI, National Park Service, Grand Canyon, AZ. National Park Service. 1985. Guide for pesticide use in the national park system. USDI, Biological Resources Division, National Park Service, Washington, DC. National Park Service. 1990. Guidelines for coordinated management of noxious weeds in greater Yellowstone area. USDI, National Park Service, Washington, DC. Neill, W. M. 1990. Tamarisk control in southwestern United States. Pp. 91-98 in: M.R. Kunzmann, R. R. Johnson and P. S. Bennett (eds.) Proceedings of Tamarisk Conference, University of Arizona, Tucson, AZ, September 23-3, 1987. Special Report No. 9. National Park Service, Cooperative National Park Resources Studies Unit, School of Renewable Natural Resources, University of Arizona, Tucson, AZ. Neill, W. M. 1996. Putting it altogether: management strategies and implementation. Presentation at Saltcedar Management and Riparian Restoration Workshop, Las Vegas, NV. Phillips, B.G., R.R. Johnson, A.M. Phillips, and J.E. Bowers. 1979. Resource Values of the Aquatic and Riparian Vegetation of Roaring Springs, Grand Canyon. Pp. 141-155 in: Proceedings of the Second Conference on Scientific Research in the National Parks, Volume 4: Resource Analysis and Mapping. USDI National Park Service, Washington, D.C. Robinson, T. W. 1965. Introduction, spread and areal extent of saltcedar (Tamarix) in the Western States. US Geological Survey Professional Paper 491-A. US Geological Survey, Reston, VA. Spence, J. 2002. Surveys of springs in the Colorado River drainage in Arches National Park, Canyonlands National Park, Glen Canyon National Recreation Area, and Grand Canyon National Park, Part 1. Draft final report. Report to the National Park Service, Water Resources Division – WASO, Denver, Colorado. 104 pp. Stevens, L.E. 2001. A synthesis of information on the ecology and management of saltcedar (Tamaricaceae: Tamarix ramosissima), with emphasis on the Grand Canyon Region: Final Progress Report. Submitted to Arizona Water Protection Fund, Phoenix, Arizona. Stevens, L. E. 1990. Tamarisk control in southwestern United States. Pp. 99-105 in: M.R. Kunzmann, R. R. Johnson and P. S. Bennett (eds.) Proceedings of Tamarisk Conference, University of Arizona, Tucson, AZ, September 23-3, 1987. Special Report No. 9. National Park Service, Cooperative National Park Resources Studies Unit, School of Renewable Natural Resources, University of Arizona, Tucson, AZ. Warren, P.L., K.L. Reichhardt, D.A. Mouat, B.T. Brown, and R.R. Johnson. 1982. Technical Report Number 9 - Vegetation of Grand Canyon National Park. National Park Service Contracts CX8210-7-0028 and CX8000-9-0033 Contribution No. 017/06. Weeks, E. P., H. L. Weaver, G. S. Campbell and B. N. Tanner. 1987. Water use by saltcedar and by replacement vegetation in the Pecos River floodplain between Acme and Artesia, New Mexico. Geological Survey Professional Paper 491-G. US Geological Survey, Reston, VA. VIII. Appendices Appendix A – Representative Project Photographs Appendix B – Project Photodocumentation Appendix C – Project Photodocumentation Summary Table Appendix D – Monitoring Transect Descriptions Appendix E – Monitoring Transect Summary Data for 2000 and 2004 Appendix F – Plant List Summary Table for Selected Canyons Appendix G – Plant Lists for Canyons with Transects Appendix H – Project Press and Articles Appendix I – Project Implementation Map APPENDIX A Tamarisk Eradication and Restoration of 63 Tributaries Representative Project Photographs APPENDIX A Tamarisk Eradication and Restoration of 63 Tributaries Representative Project Photographs – 2004 Final Report Picture 4. Volunteers making to l covers at Lees Ferry Picture 5. Organizing tools Picture 6. Tool sharpening Pictures 7-9. Native riparian vegetation Appendix A-1 Picture 1. Kim Fawcett, Kate Watters, Lori Makarick – crew leaders for the entire project Picture 2. Transportation Picture 3. Plan B Idea Picture 10. Cut stump method on mature trees Picture 12. Lopping branches Picture 11. Sawing a mature tree Picture 13. Record keeping Appendix A-2 Text Box: APPENDIX A Tamarisk Eradication and Restoration of 63 Tributaries Representative Project Photographs – 2004 Final Report Picture 14. Volunteers dig ing down to roots Picture 16. Volunteer sawing mature tree Picture 17. Volunteers hauling brush Picture 18. Volunteers pulling seedlings Picture 19. Pul ing seedling Picture 15. Sawing mature clump Appendix A-3 Text Box: APPENDIX A Tamarisk Eradication and Restoration of 63 Tributaries Representative Project Photographs – 2004 Final Report Picture 20. Crews working together Picture 22. Herbicide treatment on seedlings Picture 23. Herbicide treatment on saplings Picture 21. Site acces is not always easy! Appendix A-4 Text Box: APPENDIX A Tamarisk Eradication and Restoration of 63 Tributaries Representative Project Photographs – 2004 Final Report Picture 24. Cut stump technique Picture 25. Hack and squirt technique Picture 26. Combination technique Picture 28. Once a dense tamarisk thicket Picture 29. Athel (Tamarix aphylla) up Cove Canyon Appendix A-5 Text Box: APPENDIX A Tamarisk Eradication and Restoration of 63 Tributaries Representative Project Photographs – 2004 Final Report APPENDIX A Tamarisk Eradication and Restoration of 63 Tributaries Representative Project Photographs – 2004 Final Report Picture 30. Pul ing a mature tree Picture 31. Hauling brush Picture 33. Group working together Picture 34. Transect in rocky area Appendix A-6 Picture 36. Volunteer assisting with transect Picture 40. Crew playing pigs to end the day! Picture 39. Strange re-growth on mature tamarisk Picture 38. Reuben Teran at work up Lava Canyon Picture 37. Recording vegetation Appendix A-7 Text Box: APPENDIX A Tamarisk Eradication and Restoration of 63 Tributaries Representative Project Photographs – 2004 Final Report APPENDIX B Tamarisk Eradication and Restoration of 63 Tributaries Project Photodocumentation If you are interested in obtaining the information contained in this appendix, please contact: Lori J. Makarick Restoration Biologist Grand Canyon National Park 823 North San Francisco, Suite B Flagstaff, AZ 86001-3265 Phone: (928) 635-0139 Email: Lori_Makarick@nps.gov APPENDIX C Tamarisk Eradication and Restoration of 63 Tributaries Project Photodocumentation Summary Table APPENDIX D Tamarisk Eradication and Restoration of 63 Tributaries Monitoring Transect Descriptions APPENDIX D Monitoring Transect Data The following are the descriptions of the vegetation transects used in the tamarisk management project. The transects are 50 meters long, with a point read at every 0.5 meters, for a total of 100 points per transect. The vegetation readings are always taking on the right side of the meter tape, looking up the tape from start to end. The person doing the reading should stand on the opposite side of the tape whenever possible. When locating the transects in the GIS layer, the start point and compass bearing were used for greater accuracy. Location: Soap Creek River Mile: 11 R Date Transect Installed: 10/13/00 Transect Name: Soap 1 Start Point: End Point: Northing 0438001 Northing 0437962 Easting 4065951 Easting 4065973 Accuracy 7m Accuracy 11m Bearing: 275° 2000 Data 2004 Data Litter 7 Litter 2 Rock 42 Rock 46 Bare Ground 33 Bare Ground 48 Brush 3 Ephedra 1 Tamarisk 20 Arrowweed 1 Long-leaf brickellbush 1 Wire lettuce 2 Arrowweed 6 General Description: The transect start point is about 145 m from river at a large boulder on the south side of the wash, with the end point up canyon. The transect ends at the base of the second pour over where the meander in the wash begins. The wash is frequently scoured and the canyon is open. Tamarisk trees are in small clumps. The transect location is in the shadscale-Mormon tea-beavertail cactus plant community. The vegetation near the transect is primarily baccharis, with a few phragmites patches. The transect occurs in the Toroweap geological layer. Location: Carbon Creek River Mile: 64.7 R Date Transect Installed: 10/16/00 Transect Name: Carbon 1 Start Point: End Point: Northing 0425707 Northing 0425557 Easting 4001211 Easting 4001213 Bearing: 243° 2000 Data 2004 Data Litter 18 Rock 43 Bare Ground 56 Bare Ground 57 Rock 14 Brush 12 Tamarisk 19 Happlopappus sp. 3 General Description: The transect installed in the narrows section of Carbon Creek, about 150 meters above where the trail drops down into the narrows. The area has sparse vegetation, but there are a significant number of new tamarisk seedlings during transect installation. The transect is in the shadscale-Mormon tea-beavertail cactus plant community. The beginning of the transect is 372 meters below where the trail goes over to Lava Canyon. There is a large mesquite near the transect start point. The transect end point is up canyon. The transect primarily occurs in the Tapeats sandstone geological layer. Location: Carbon Creek River Mile: 64.7 R Date Transect Installed: 10/16/00 Transect Name: Carbon 2 Start Point: End Point: Northing 0425363 Northing 0425414 Easting 4001185 Easting 4001260 Bearing: 44° 2000 Data 2004 Data Litter 7 Rock 46 Rock 9 Bare Ground 53 Bare Ground 70 Brush 1 Brush 4 Tamarisk 19 Baccharis 1 General Description: The transect start point was the brain rock, which is located where the trails goes to the westsouthwest over to Lava Canyon. The brain rock moved during a large flash flood, so the start point was relocated based on the photographs. The end point is down canyon, towards the narrows of Carbon Creek. There are a few mesquite trees located near the transect. The transect occurs in the shadscale-Mormon tea-beavertail cactus plant community. The transect primarily occurs in the Tapeats sandstone geological layer. Location: Carbon Creek River Mile: 64.7 R Date Transect Installed: 10/16/00 Transect Name: Carbon 3 Start Point: End Point: Northing 0425190 Northing 0425137 Easting 4001275 Easting 4001254 Bearing: 216° 2000 Data 2004 Data Litter 77 Litter 43 Rock 0 Rock 3 Bare Ground 0 Bare Ground 23 Brush 5 Brush 27 Tamarisk 93 Tamarisk 3 Unknown forb 1 Scouring rush 1 Phragmites 32 Baccharis 4 General Description: The transect was located in the dense tamarisk thicket above the Carbon Creek narrows. The tape was laid on the northwest side of the drainage, about 2 meters from mid-drainage. The start point is up canyon, with the end point toward the narrows. The transect occurs in the shadscale-Mormon tea-beavertail cactus plant community. In 2000, there was prince's plume and salt grass about 1m from transect. In 2004, phragmites was growing in the latter ¼ of the transect. The transect occurs in a slump, landslide, and rockfall geological layer. Location: Lava Chuar Canyon River Mile: 65.5R Date Transect Installed: 10/16/00 Transect Name: Lava Chuar 1 Start Point: End Point: Northing 04258237 Northing 0425865 Easting 3999666 Easting 399963 Accuracy 5m 7m Bearing: 144° 2000 Data 2004 Data Litter 12 Litter 3 Rock 19 Rock 17 Bare Ground 56 Bare Ground 77 Brush 0 Brush 1 Tamarisk 20 Water 1 Mesquite 1 Flattop Buckwheat 1 General Description: The transect is installed near where the loop hike from Carbon Creek drops into Lava Canyon. The transect crosses the wash in an area with scattered tamarisk. There are numerous mesquite, very thick in places, above the wash area. The transect location is in the brittlebush-Mormon tea-catclaw acacia plant community and in the geological layer called the Galeros Formation. Location: Lava Chuar Canyon River Mile: 65.6 R Date Transect Installed: 10/17/00 Transect Name: Lava Chuar 2 Start Point: End Point: Northing 0426133 Northing 0426163 Easting 3999535 Easting 3999494 Accuracy 8m 4m Bearing: 138° 2000 Data 2004 Data Litter 8 Litter 3 Rock 18 Rock 17 Bare Ground 62 Bare Ground 73 Tamarisk 17 Water 7 General Description: The transect start point is located .45 kilometers from the Colorado River. The start point is a large blackish purple Dox boulder; located below the Supergroup formation. The transect end point is down canyon, toward the river. There was a large tamarisk on the transect that was not hit during the installation. Also spiny aster was located in the transect and not hit. This transect is dominated by the Dox sandstone geological layer and is in the brittlebush-Mormon tea-catclaw acacia plant community. Location: Lava Chuar Canyon River Mile: 65.5 R Date Transect Installed: 10/17/00 Transect Name: Lava Chuar 3 Start Point: End Point: Northing 0426302 Northing 0426348 Easting 3999482 Easting 3999469 Accuracy 10m 4m Bearing: 110° 2000 Data 2004 Data Litter 36 Litter 16 Rock 11 Rock 14 Bare Ground 34 Bare Ground 55 Brush 2 Brush 4 Tamarisk 38 Water 2 Phragmites 20 Phragmites 16 General Description: The start point of transect located 0.28 kilometers from the Colorado River. The transect end point is down canyon, toward river. On the east side of transect is an 8 meter ledge with some large mesquite, just below the super group formation. This transect was located in a very dense tamarisk thicket with phragmites intermingled. Above the transect on a higher terrace is a mesquite bosque. In 2004, large flowered stork’s bill (Erodium texanum), white brittlebush (Encelia farinosa) and skeletonweed (Eriogonum deflexum) grew in the drainage, but were not hit on the transect. This transect is dominated by the Dox sandstone geological layer and is in the brittlebush-Mormon tea-catclaw acacia plant community. Location: Serpentine Canyon River Mile: 106 L Date Transect Installed: 10/21/00 Transect Name: Serpentine 1 Start Point: End Point: Northing 0380193 Northing 0380142 Easting 4007295 Easting 4007303 Accuracy 15m 15m Bearing: 252° 2000 Data 2004 Data Litter 3 Litter 36 Rock 38 Rock 22 Bare Ground 34 Bare Ground 38 Brush 18 Catclaw acacia 3 Tamarisk 6 Three awn 3 Three awn 1 Ephedra 6 Long-leaf brickellbush 5 Jimmyweed 2 Ephedra 6 Red brome 3 Catclaw acacia 2 Silver beardgrass 1 Silver beardgrass 1 General Description: The transect is located 0.44 kilometers from river in the Vishnu Schist. The end point is located up canyon in a group of scattered brickellia. The readings were from the creek side of the tape. The drainage started at 2.5 meters on the tape. This transect occurs in the Granodiorite geological layer, a part of the Zoraster plutonic complex. The transect occurs in the brittlebush-Mormon tea-catclaw acacia plant community. Location: Serpentine Canyon River Mile: 106 L Date Transect Installed: 10/21/00 Transect Name: Serpentine 2 Start Point: End Point: Northing 0380551 Northing 0380539 Easting 4007407 Easting 4007404 Bearing: 314° 2000 Data 2004 Data Litter 13 Litter 39 Rock 36 Rock 32 Bare Ground 28 Bare Ground 24 Brush 5 Brush 7 Tamarisk 13 Soil Crust 4 Baccharis 6 Catclaw acacia 3 Three awn 4 Three awn 1 Cassis 1 Desert trumpet 1 Brittlebush 4 Ephedra 2 Catclaw acacia 3 Jimmyweed 3 Ephedra 2 Red brome 9 Desert trumpet 1 General Description: The transect is located in wash channel 0.14 kilometers from the Colorado River. The transect end point is up canyon. The downstream side of tape was read. There were several other tamarisk in the transect that were not hit. The tamarisk trees in this area were scattered. This transect occurs in the Granodiorite geological layer, a part of the Zoraster plutonic complex. The transect occurs in the brittlebush-Mormon tea-catclaw acacia plant community. Location: Hotauta Canyon River Mile: 107.8 R Date Transect Installed: 10/21/00 Transect Name: Hotauta 1 Start Point: End Point: Northing 0380797 Northing 0380746 Easting 4010162 Easting 4010161 Accuracy 7m 9m Bearing: 266 2000 Data 2004 Data Litter 10 Litter 5 Rock 32 Rock 65 Bare Ground 54 Bare Ground 31 Brush 0 Ephedra 1 Tamarisk 8 Schismus sp. 1 General Description: The ransect start point is located up the right fork of the drainage, in the main canyon, at a large house sized boulder, with end point down canyon toward river. Tamarisk were scattered in the wash, with no thick patches. In 2004, the vegetation that was missed during the transect, but occurred in the vicinity included: catclaw acacia (Acacia greggii), Arizona three awn (Aristida arizonica), Bothriochloa sp., brittlebush (Encelia sp.), tobacco (Nicotiana sp.), Phacelia sp., Lepidium sp., galleta grass (Hilaria sp.), Eriogonum sp, and red brome (Bromus rubens). The geological layer of this transect consists primarily of diabase intrusives, sills and dikes. The transect occurs in the brittlebush-Mormon tea-catclaw acacia plant community. Location: Waltenberg Canyon River Mile: 112 R Date Transect Installed: 10/22/00 Transect Name: Waltenberg 1 Start Point: End Point: Northing 373909 Northing 0373903 Easting 4011946 Easting 4011903 Accuracy 9.4m 8.8m Bearing: 194° 2000 Data 2004 Data Litter 4 Litter 4 Rock 69 Rock 41 Bare Ground 20 Bare Ground 49 Brush 1 Brush 4 Tamarisk 14 Long-leaf brickellbush 1 Three awn 1 Cryptantha 1 Water 2 Rock nettle 1 Unknown Grass 1 General Description: The start point of the transect is located up canyon, below a large pour over, with end point toward river. There are barrel cacti on a ledge above transect. The tamarisk trees were scattered and intermittent. This transect occurs in the Vishnu schist geological layer and the brittlebush-Mormon tea-catclaw acacia plant community. Location: Garnet Canyon River Mile: 114 L Date Transect Installed: 3/17/03 Transect Name: Garnet 1 Start Point: End Point: Northing 372741 Northing 372782 Easting 4008291 Easting 4008274 Bearing: 122° 2000 Data 2004 Data Litter 32 Litter 12 Rock 27 Rock 18 Bare Ground 14 Bare Ground 51 Brush 1 Brush 1 Tamarisk 24 Catclaw acacia 5 Catclaw acacia 10 Cattail 1 Alkali sacaton 4 Desert straw 1 Brittlebush 2 Ephedra 1 Cane bluestem 3 Galleta grass 2 Ephedra 2 Gutierrezia 1 Jimmyweed 4 Jimmyweed 3 Poreleaf 1 Mesa dropseed 1 Three awn 1 Spike dropseed 1 Unknown grass 1 General Description: To access the canyon, float past the canyon mouth and go down river to the first substantial beach / gravel area on the left. Hike up that drainage, through the arch, to the Tonto Trail. Follow the trail up river until it drops down into Garnet Canyon. The transect is located up canyon from where the trail drops in, just below where the canyon becomes very narrow. The end point of the transect is up canyon – in the tapeats ledge on creek right. The transect ends at 43.5 meters on the tape. In 2004, tobacco, rock nettle (Eucnide urens), desert bedstraw (Galium stellatum), brittlebush, cane bluestem (Bothriochloa barbinoides), poreleaf (Porophyllum sp.), Arizona three awn, brickellia, and Chenopodium sp. also occurred in the canyon but were not hit on the transect. The primary geological layer is the Tapeats sandstone, and the transect is located in the brittlebush-Mormon tea-catclaw acacia plant community. Location: Lower Elves Chasm River Mile: 116.5 L Date Transect Installed: 10/22/00 Transect Name: Elves 1 Start Point: End Point: Northing 0369665 Northing 0369626 Easting 4006613 Easting 4006611 Accuracy 5m 8m Bearing: 260° 2000 Data 2004 Data Litter 1 Litter 15 Rock 55 Rock 54 Bare Ground 20 Bare Ground 19 Brush 3 Brush 9 Tamarisk 14 Soil Crust 1 Seep willow 1 Water 3 Water / puddle 5 Brittlebush 2 Water / creek 5 Rabbitsfoot grass 2 Unknown forb 2 Seep willow 1 Unknown grass 1 Shiny leaved blazing star 1 Ephedra 1 Six-weeks fescue 2 General Description: The transect is located perpendicular to stream in the lower portion of the canyon. There are scattered redbud trees, catclaw acacia, seep willows, grasses and shrubs. The transect occurs primarily in the Tapeats sandstone geological layer and is located in the Mormon tea-big galleta grass-catclaw acacia plant community. Location: Bighorn Wash River Mile: 117 L Date Transect Installed: 10/22/00 Transect Name: Bighorn Wash 1 Start Point: End Point: Northing 0368911 Northing 0368944 Easting 4007044 Easting 4007057 Accuracy 10m 10m Bearing: 62° 2000 Data 2004 Data Litter 33 Litter 43 Rock 5 Rock 4 Bare Ground 13 Bare Ground 8 Brush 8 Brush 26 Tamarisk 7 Soil Crust 1 Rush species 17 Aster sp. 1 Scratchgrass 26 Baccharis 1 Saw grass 6 Bushy beardgrass 1 Satintail 42 Cane bluestem 3 Coyote willow 4 Cottonwood 6 Cottonwood 1 Coyote willow 7 Water 3 Goldenrod 5 Buffalo berry 2 Gutierrezia 1 Seep willow 23 Horsetail 1 Isocoma sp. 2 Aster sp. 2 Rush species 3 Satintail 28 Saw grass 6 Scratchgrass 42 Seep willow 29 Sporobolus sp. 1 General Description: The transect is located in the upper portion of the canyon, above the massive pour over. The start point is below a small pour over where the main drainage forms. It is located in a dense riparian area with diverse vegetation. From 31 to 38 meters, the transect was under the canopy of a large cottonwood tree. Plant cover was only counted when the 2 meter pole hit plant material, but there was additional vegetation in the canopy. The transect occurs in the Tapeats sandstone geological layer and the brittlebush-Mormon tea-catclaw acacia plant community. Location: Lower Blacktail Canyon River Mile: 120 R Date Transect Installed: 10/23/00 Transect Name: Blacktail 1 Start Point: End Point: Northing 367831 Northing 367791 Easting 4011519 Easting 4011519 Bearing: 30° 2000 Data 2004 Data Litter 0 Litter 3 Rock 45 Rock 79 Bare Ground 50 Bare Ground 18 Brush 0 Brush 0 Tamarisk 5 Waterweed 1 Water / Creek 2 General Description: This transect is located in the narrows of lower Blacktail Canyon. The transect start point located 157 meters from the river, around the first corner from the mouth of the canyon. The transect end point is up canyon. The area gets scoured periodically and primarily only seedlings were present during installation. The geological layer of this transect is Tapeats sandstone. The transect is located in the brittlebush-Mormon tea-catclaw acacia plant community. Location: Forster Canyon River Mile: 122.7 L Date Transect Installed: 10/23/00 Transect Name: Forster 1 Start Point: End Point: Northing 0363435 Northing 0363390 Easting 4011988 Easting 4011974 Accuracy 8.5m Bearing: 252° 2000 Data 2004 Data Litter 2 Litter 13 Rock 29 Rock 35 Bare Ground 59 Bare Ground 52 Brush 0 Brush 1 Tamarisk 17 General Description: The transect start point is located in the wash about 0.28 kilometers from the river, with the end point up canyon. There were more tamarisk trees west of this transect in the drainage during installation. In 2000, also noted were Russian thistle, velcro plant, rye grass, ephedra, long-leaved brickellbush, artemesia, primrose, pore leaf and brittlebush and various grasses. In 2004, red brome, Isocoma sp., and dropseed grasses were also observed in the canyon. This transect occurs in the Tapeats sandstone geological layer just above the river deposits consisting of recent sand, boulder, and mud. It is located in the Mormon tea-big galleta grass-catclaw acacia plant community. Location: Specter Canyon River Mile: 129 L Date Transect Installed: 10/24/00 Transect Name: Specter 1 Start Point: End Point: Northing 0366742 Northing 0366705 Easting 4020102 Easting 4020219 Accuracy 6m 9m Bearing: 322° 2000 Data 2004 Data Litter 0 Litter 4 Rock 20 Rock 46 Bare Ground 70 Bare Ground 41 Brush 0 Brush 4 Tamarisk 12 Water 1 Scratchgrass 1 Desert straw 1 Water 3 Jimmyweed 2 Notch-leaved scorpion weed 1 Tobacco 1 Unknown Grass 1 General Description: This transect is located about 690 meters from the river. The start point is near where canyon forks, with end point up canyon. The wash bed is open and well-scoured, with tamarisk scattered during transect installation. In 2004, other vegetation observed in the canyon included Astragulus sp., Mentzelia sp., desert broom (Baccharis sergioloides), long-leaved brickellbush, rock nettle (Eucnide urens), Camissonia sp., Cryptantha sp. This transect occurs in the Bright Angel shale geological layer and the brittlebush-Mormon tea-catclaw acacia plant community. Location: Specter Canyon River Mile: 129 L Date Transect Installed: 10/24/00 Transect Name: Specter 2 Start Point: End Point: Northing 0366753 Northing 0366702 Easting 4020162 Easting 4020165 Accuracy 6m 6m Bearing: 267° 2000 Data 2004 Data Litter 22 Litter 33 Rock 23 Rock 44 Bare Ground 28 Bare Ground 14 Brush 0 Brush 23 Tamarisk 23 Catclaw acacia 5 Cattail 6 Three awn 2 Long-leaf brickellbush 16 Galleta grass 13 Cane bluestem 13 Snakeweed 7 Galleta grass 2 Jimmyweed 7 Catclaw acacia 4 Unknown Grass 2 Water 1 General Description: This transect is ocated about 690 meters from river. The start point is near where canyon forks, with end point up the left fork. It was located in dense riparian vegetation with thick tamarisk. In 2004, vegetation also observed in the canyon was Andropogon sp., ephedra, desert straw, bursage (Ambrosia dumosa), brittlebush, (Encelia farinosa), catclaw acacia (Acacia greggii), and spiny-leaved sowthistle (Sonchus asper). This transect occurs in the Bright Angel shale geological layer and the brittlebush-Mormon tea-catclaw acacia plant community. Location: Cranberry Canyon River Mile: 138.5 R Date Transect Installed: 10/25/00 Transect Name: Cranberry 1 Start Point: End Point: Northing 0361690 Northing 0361698 Easting 40295121 Easting 4029563 Accuracy 8.7m 9.4m Bearing: 10° 2000 Data 2004 Data Litter 30 Litter 36 Rock 37 Rock 55 Bare Ground 17 Bare Ground 7 Brush 1 Brush 3 Tamarisk 4 Soil Crust 3 Happlopappus 12 Catclaw acacia 1 Pore leaf 3 Three awn 1 Seep willow 27 Brittlebush 4 Scratchgrass 1 Chuckwalla’s delight 4 Soil Crust 8 Jimmyweed 2 Brittlebush 4 Seep willow 18 Waterweed 2 General Description: This transect is located in upper portion of the canyon, above the large tapeats pour over. The access is on the downstream side of the pull-in, 2 drainages down. There is very fragile vegetation and microbiotic soil crusts on the hike up into the canyon. The start point of transect is above large pour over, with end point up canyon. The vegetation is dense riparian with good diversity in the white bursage-Mormon tea-barrel cactus plant community. There are seeps along channel. This transect occurs in the Bright Angel shale geological layer. Location: Last Chance Canyon River Mile: 155.5 R Date Transect Installed: 10/26/00 Transect Name: Last Chance 1 Start Point: End Point: Northing 0342146 Northing 0342172 Easting 4020880 Easting 4020889 Bearing: 82° 2000 Data 2004 Data Litter 5 Litter 23 Rock 17 Rock 16 Bare Ground 10 Bare Ground 7 Brush 1 Brush 9 Tamarisk 19 Water 1 Seep willow 10 Tamarisk 10 Unknown grass 2 Three awn 2 Maidenhair fern 1 Long-leaf brickellbush 6 Moss 1 Brittlebush 1 Water 1 Cattail 1 Common plantain 1 Cudweed 1 Scratchgrass 8 Seep willow 13 Unknown forb 2 General Description: The transect begins at a tamarisk about 8 meters from where spring drips down (on Muav slabs), then heads down to tamarisk at the 45,000 cfs river level. The cover readings ended at 27 meters, which is were the 45,000 cfs level is. The remainder of the cover readings would be bare ground / sand and then water. There were numerous small seedlings on the side of the small channel below the spring. This transect occurs in the Bright Angel shale geological layer and the brittlebush-Mormon tea-catclaw acacia plant community. Location: Cove Canyon River Mile: 174 R Date Transect Installed: 10/28/00 Transect Name: Cove 1 Start Point: End Point: Northing 0318934 Northing 318938 Easting 4012497 Easting 4012446 Accuracy 26m Bearing: 196° 2000 Data 2004 Data Litter 10 Litter 20 Rock 11 Rock 11 Bare Ground 36 Bare Ground 57 Brush 7 Brush 13 Tamarisk 52 Red brome 7 Desert broom 1 Sacred datura 1 Sand dropseed 2 Spike dropseed 2 Waterweed 3 General Description: The transect is located in lower Cove Canyon, just below the large pour over. The start point is on east side of drainage, on the southwest side of a large boulder pile approximately 75 meters down canyon from the large pour over. It is surrounded by hanging gardens and perennial seeps. There was also one large Tamarisk aphylla in this area. In 2004, twining snapdragon (Maurandella antirrhiniflora) was observed as an associated species that was not hit on the transect. The start point is up canyon, with end point toward river. This transect occurs in the Muav limestone shale geological layer and the brittlebush-creosotebush-Mormon tea plant community. Location: Cove Canyon River Mile: 174 R Date Transect Installed: 10/28/00 Transect Name: Cove 2 Start Point: End Point: Northing 0318924 Northing 318936 Easting 4012487 Easting 4012535 Accuracy 20m 16m Bearing: 8° 2000 Data 2004 Data Litter 25 Litter 25 Rock 0 Rock 9 Bare Ground 45 Bare Ground 43 Brush 7 Brush 0 Tamarisk 30 Catclaw acacia 3 Coyote willow 2 Long-leaf brickellbush 2 Sacred datura 2 Brittlebush 6 Burroweed 1 Lepidium sp. 2 Scratchgrass 2 Nightshade 3 Water 1 Red brome 13 Ripgut brome 1 Sacred datura 20 Spike dropseed 5 Tobacco 1 General Description: The start point is on the north side of huge flat-topped boulder in middle of drainage, approximately 135 meters down canyon from the pour over. The end point is up canyon. In 2004, associated species observed in canyon were ivy leaf groundcherry (Physalis hederifolia), Louisiana sage (Artemesia ludoviciana), paperflower (Psilostrophe sp.), bristlegrass (Setaria verticillata.), snakeweed (Gutierrezia sarothrae), wolfberry (Lycium sp.), six-weeks fescue (Vulpia octoflora), Astragulus sp., and littleleaf globe mallow (Sphaeralcea parvifolia). This transect occurs in the Muav limestone shale geological layer and the brittlebushcreosotebush- Mormon tea plant community. APPENDIX E Tamarisk Eradication and Restoration of 63 Tributaries Monitoring Transect Summary Data for 2000 and 2004 APPENDIX F Tamarisk Eradication and Restoration of 63 Tributaries Plant List Summary Table for Selected Canyons Appendix F: Plant Species List for Selected Canyons Canyon: Soap Canyon Genus / Species / Authority Common Names Achnatherum hymenoides (Roemer & J.A. Schultes) Barkworth indian ricegrass Allionia incarnata L. trailing four o'clock Artemisia filifolia Torr. sand sagebrush Artemisia ludoviciana Nutt. Louisiana sage Atriplex canescens (Pursh) Nutt. four wing saltbush Atriplex obovata Moq. saltbush Brickellia longifolia S. Wats. longleaf brickellbush Bromus rubens L. foxtail chess, red brome Camissonia multijuga (S. Wats.) Raven camissonia, frost-stem suncup Chrysothamnus nauseosus (Pall.) Britton rabbitbrush Cirsium sp. (unknown not exotic) Datura wrightii Regel sacred datura Encelia resinifera Gray white brittlebush Ephedra sp. (use when unknown) Eriogonum inflatum Torr. & Frém. desert trumpet Hesperostipa speciosa Lepidium latifolium L. perennial pepperweed Machaeranthera pinnatifida var. gooddingii (A. Nels.) B.L. Turner & Hartman spiny goldenweed Opuntia basilaris var. longiaerolata Opuntia erinacea Engelm. & Bigelow ex Engelm. var. utahensis (Engelm.) L. Benson mojave prickly pear, grizzly bear cactus Phacelia crenulata Torr. ex S. Wats. notch-leaf scorpion-weed Phacelia crenulata var. angustifolia Plantago ovata Forsk. woolly plantain, inland plantain Salsola tragus L.; Salsola iberica Sennen & Pau. russian thistle Sphaeralcea ambigua Gray desert mallow Sporobolus airoides (Torr.) Torr. alkali sacaton Stanleya pinnata (Pursh) Britt. prince's plume, desert plume Stephanomeria pauciflora (Torr) A. Nels desert straw Tiquilia latior (I.M. Johnston) A. Richards. hispid coldenia Vulpia octoflora (Walt.) Rydb. six-weeks fescue Xylorhiza tortifolia (Torr. & Gray) Greene mohave aster Yucca elata (Engelm.) Engelm. Soaptree yucca Canyon: North Canyon Appendix G Plant Lists for Canyons with Transects Canyon: Soap Canyon Genus / Species / Authority Common Names Achnatherum hymenoides (Roemer & J.A. Schultes) Barkworth indian ricegrass Allionia incarnata L. trailing four o'clock Artemisia filifolia Torr. sand sagebrush Artemisia ludoviciana Nutt. Louisiana sage Atriplex canescens (Pursh) Nutt. four wing saltbush Atriplex obovata Moq. saltbush Brickellia longifolia S. Wats. longleaf brickellbush Bromus rubens L. foxtail chess, red brome Camissonia multijuga (S. Wats.) Raven camissonia, frost-stem suncup Chrysothamnus nauseosus (Pall.) Britton rabbitbrush Cirsium sp. (unknown not exotic) Datura wrightii Regel sacred datura Encelia resinifera Gray white brittlebush Ephedra sp. (use when unknown) Eriogonum inflatum Torr. & Frém. desert trumpet Lepidium latifolium L. perennial pepperweed Machaeranthera pinnatifida var. gooddingii (A. Nels.) B.L. Turner & Hartman spiny goldenweed Opuntia basilaris var. longiaerolata Opuntia erinacea Engelm. & Bigelow ex Engelm. var. utahensis (Engelm.) L. Benson mojave prickly pear, grizzly bear cactus Phacelia crenulata Torr. ex S. Wats. notch-leaf scorpion-weed Phacelia crenulata var. angustifolia Plantago ovata Forsk. woolly plantain, inland plantain Salsola tragus L. russian thistle Sphaeralcea ambigua Gray desert mallow Sporobolus airoides (Torr.) Torr. alkali sacaton Stanleya pinnata (Pursh) Britt. prince's plume, desert plume Stephanomeria pauciflora (Torr) A. Nels desert straw Tiquilia latior (I.M. Johnston) A. Richards. hispid coldenia Vulpia octoflora (Walt.) Rydb. six-weeks fescue Xylorhiza tortifolia (Torr. & Gray) Greene mohave aster Yucca elata (Engelm.) Engelm. Soaptree yucca Canyon: Lava Chuar Canyon Genus / Species / Authority Common Names Acacia greggii Gray catclaw acacia Adiantum capillus-veneris L. maidenhair fern Agave utahensis Engelm. century plant Aristida arizonica Vasey Arizona three awn Artemisia ludoviciana Nutt. Louisiana sage Astragalus sp. (use when unknown) Baccharis salicifolia (Ruiz & Pavón) Pers. baccharis, seep willow Bothriochloa barbinodis (Lag.) Herter cane bluestem Brickellia longifolia S. Wats. longleaf brickellbush Bromus rubens L. foxtail chess, red brome Camissonia speculicola (Raven) Raven Kaibab suncup Chaenactis stevioides Hook. & Arn. Steve's dusty maiden Cladium californicum (S. Wats.) O'Neill sawgrass Cryptantha capitata (Eastw.) I.M. Johnston capitate catseye Dasyochloa pulchella (Kunth) Willd. ex Rydb. fluff grass Descurainia pinnata (Walt.) Britt. yellow tansy mustard Encelia farinosa Gray ex Torr. white brittlebush Equisetum ×ferrissii Clute (pro sp.) horsetail Eriogonum deflexum Torr. skeleton weed Erodium cicutarium (L.) L'Hér. ex Ait. filaree, stork's bill Fallugia paradoxa (D. Don) Endl. ex Torr. apache plume Galium stellatum Kellogg desert bedstraw Imperata brevifolia Vasey satintail Juniperus osteosperma (Torr.) Little utah juniper Mammillaria tetrancistra Engelm. Corky-seed fishhook Muhlenbergia asperifolia (Nees & Meyen ex Trin.) Parodi scratch grass Oenothera pallida Lindl. pale evening primrose Perityle emoryi Torr. emory rock daisy Phacelia sp. (use when unknown) Phragmites australis (Cav.) Trin. ex Steud. giant common reed Populus fremontii S. Wats. fremont cottonwood Canyon: Lava Chuar Canyon continued Genus / Species / Authority Common Names Prosopis glandulosa Torr. honey mesquite Salix exigua Nutt. coyote willow Sphaeralcea ambigua Gray desert mallow Stanleya pinnata (Pursh) Britt. prince's plume, desert plume Streptanthella longirostris (S. Wats.) Rydb. long beaked twist flwr Tamarix ramosissima Ledeb. tamarisk, salt cedar Thamnosma montana Torr. & Frém. turpentine broom Typha domingensis Pers. cattail Yucca baccata Torr. banana yucca Canyon: Waltenberg Canyon Genus / Species / Authority Common Names Acacia greggii Gray catclaw acacia Agave utahensis var. utahensis Engelm. Utah agave Aristida arizonica Vasey Arizona three awn Brickellia longifolia S. Wats. longleaf brickellbush Datura wrightii Regel sacred datura Encelia farinosa Gray ex Torr. white brittlebush Eucnide urens (Parry ex Gray) Parry rock nettle, sting bush Funastrum cynanchoides (Dcne.) Schlechter ssp. cynanchoides climbing milkweed Opuntia phaeacantha Engelm. desert prickly pear, engelmann prickly pear Sporobolus sp. Canyon: Garnet Canyon Genus / Species / Authority Common Names Abronia elliptica A. Nels. sand verbena Acacia greggii Gray catclaw acacia Achnatherum speciosum (Trin. & Rupr.) Barkworth Acourtia wrightii (Gray) Reveal & King brownfoot Agave utahensis Engelm. century plant Amsinckia menziesii (Lehm.) A. Nels. & J.F. Macbr. var. intermedia (Fisch & C.A. Mey.) Ganders coast fiddleneck Anemone tuberosa Rydb. desert windflower, anemone Aristida adscensionis L. six-weeks three-awn Aristida arizonica Vasey Arizona three awn Artemisia ludoviciana Nutt. Louisiana sage Baccharis salicifolia (Ruiz & Pavón) Pers. baccharis, seep willow Bebbia juncea (Benth.) Greene var. aspera Greene chuckwalla's delight Bothriochloa barbinodis (Lag.) Herter cane bluestem Brickellia atractyloides Gray spiny brickellbush Brickellia longifolia S. Wats. longleaf brickellbush Bromus rubens L. foxtail chess, red brome Bromus tectorum L. cheatgrass, downy chess Camissonia speculicola (Raven) Raven Kaibab suncup Chenopodium sp. Cirsium neomexicanum Gray New Mexico thistle Cryptantha capitata (Eastw.) I.M. Johnston capitate catseye Cylindropuntia whipplei Engelm. & Bigelow whipple cholla Dasyochloa pulchella (Kunth) Willd. ex Rydb. fluff grass Descurainia sp. Draba cuneifolia Nutt. ex Torr. & Gray whitlow grass Echinocactus polycephalus Engelm. & Bigelow barrel cactus, cottontop Echinocactus polycephalus var. polycephalus Englem. & Bigel multi-headed barrel cactus, cottontop Echinocereus engelmannii (Parry ex Engelm.) Lem. englemann hedgehog Echinocereus triglochidiatus Engelm. claretcup cactus Encelia farinosa Gray ex Torr. white brittlebush Ephedra nevadensis S. Wats. Nevada mormon tea Ephedra sp. (use when unknown) Ephedra torreyana S. Wats. torrey mormon tea, torrey joint-fir Equisetum ×ferrissii Clute (pro sp.) horsetail Eriogonum deflexum Torr. skeleton weed Eriogonum inflatum Torr. & Frém. desert trumpet Canyon: Garnet Canyon continued Genus / Species / Authority Common Names Erodium cicutarium (L.) L'Hér. ex Ait. filaree, stork's bill Eucnide urens (Parry ex Gray) Parry rock nettle, sting bush Ferocactus cylindraceus (Engelm.) Orcutt var. cylindraceus California barrel cactus Ferocactus cylindraceus (Engelm.) Orcutt var. eastwoodiae (L. Benson) yellow-spined barrel Festuca sp. Galium stellatum Kellogg desert bedstraw Gutierrezia sarothrae (Pursh) Britt. & Rusby broom snakeweed Hedeoma oblongifolia (Gray) Heller mock pennyroyal Isocoma sp. Lycium andersonii Gray wolfberry, anderson thornbush Lycium pallidum Miers rabbit thorn Machaeranthera pinnatifida var. gooddingii (A. Nels.) B.L. Turner & Hartman spiny goldenweed Mammillaria tetrancistra Engelm. Corky-seed fishhook Maurandella antirrhiniflora (Humb. & Bonpl. ex Willd.) Rothm. twining snapdragon, blue snapdragon vine Mentzelia tricuspis Gray shiny-leaved blazing star Muhlenbergia asperifolia (Nees & Meyen ex Trin.) Parodi scratch grass Nicotiana trigonophylla Dunal desert tobacco Oenothera pallida Lindl. pale evening primrose Opuntia phaeacantha Engelm. desert prickly pear, engelmann prickly pear Opuntia sp. (cholla) Pellaea truncata Goodding spiny cliffbrake Petrophyton caespitosum (Nutt.) Rydb. mat rockspirea Phacelia crenulata Torr. ex S. Wats. notch-leaf scorpion-weed Phacelia sp. (use when unknown) Pholistoma auritum var. Arizonica Arizona fiesta flower Pleuraphis jamesii Torr. galleta Porophyllum gracile Benth. pore-leaf, odora Sphaeralcea ambigua Gray desert mallow Sphaeralcea grossulariifolia (Hook. & Arn.) Rydb. gooseberryleaf globe mallow Sphaeralcea parvifolia A. Nels. littleleaf globe mallow Sporobolus contractus A.S. Hitchc. spike dropseed Sporobolus cryptandrus (Torr.) Gray sand dropseed Sporobolus flexuosus (Thurb. ex Vasey) Rydb. mesa dropseed Canyon: Garnet Canyon continued Genus / Species / Authority Common Names Sporobolus sp. Stephanomeria pauciflora (Torr) A. Nels desert straw Tamarix ramosissima Ledeb. tamarisk, salt cedar Thymophylla pentachaeta var. pentachaeta (DC.) Small fetid Marigold Tidestromia lanuginosa (Nutt.) Standl. woolly tidestromia Trixis californica Kellogg trixis Typha domingensis Pers. cattail Vulpia octoflora (Walt.) Rydb. six-weeks fescue Canyon: Bighorn Wash Genus / Species / Authority Common Names Acacia greggii Gray catclaw acacia Agave utahensis Engelm. century plant Agrostis semiverticillata Andropogon glomeratus (Walt.) B.S.P. bushy beardgrass Aristida adscensionis L. six-weeks three-awn Astragalus sp. (use when unknown) Baccharis emoryi Gray Emory baccharis Baccharis salicifolia (Ruiz & Pavón) Pers. baccharis, seep willow Bothriochloa barbinodis (Lag.) Herter cane bluestem Brickellia longifolia S. Wats. longleaf brickellbush Bromus rubens L. foxtail chess, red brome Cladium californicum (S. Wats.) O'Neill sawgrass Echinocereus engelmannii (Parry ex Engelm.) Lem. englemann hedgehog Eleocharis sp. Encelia farinosa Gray ex Torr. white brittlebush Ephedra sp. (use when unknown) Equisetum ×ferrissii Clute (pro sp.) horsetail Eriogonum inflatum Torr. & Frém. desert trumpet Ferocactus cylindraceus (Engelm.) Orcutt var. cylindraceus California barrel cactus Galium stellatum Kellogg desert bedstraw Gutierrezia sarothrae (Pursh) Britt. & Rusby broom snakeweed Imperata brevifolia Vasey satintail Isocoma pluriflora (Torr. & Gray) Greene jimmyweed Muhlenbergia asperifolia (Nees & Meyen ex Trin.) Parodi scratch grass Nolina microcarpa S. Wats. beargrass Oenothera elata ssp. hookeri (Torr. & Gray) W. Dietr. & W.L. Wagner hooker evening primrose Opuntia phaeacantha Engelm. desert prickly pear, engelmann prickly pear Pleuraphis jamesii Torr. galleta Polypogon monspeliensis (L.) Desf. rabbitfoot grass Populus fremontii S. Wats. fremont cottonwood Rhus trilobata Nutt. var. simplicifolia Salix exigua Nutt. coyote willow Salix gooddingii Ball gooding willow Shepherdia rotundifolia Parry round-leaf buffalo berry Solidago sp. (use when unknown) Sonchus asper (L.) Hill spiny-leaved sowthistle Sporobolus sp. Canyon: Last Chance Genus / Species / Authority Common Names Acacia greggii Gray catclaw acacia Adiantum capillus-veneris L. maidenhair fern Aristida arizonica Vasey Arizona three awn Artemisia ludoviciana Nutt. Louisiana sage Baccharis salicifolia (Ruiz & Pavón) Pers. baccharis, seep willow Baccharis sergiloides Gray waterweed Bebbia juncea (Benth.) Greene var. aspera Greene chuckwalla's delight Brickellia longifolia S. Wats. longleaf brickellbush Bromus rubens L. foxtail chess, red brome Camissonia multijuga (S. Wats.) Raven camissonia, frost-stem suncup Conyza canadensis (L.) Cronq. horseweed Datura wrightii Regel sacred datura Echinocereus engelmannii (Parry ex Engelm.) Lem. englemann hedgehog Encelia farinosa Gray ex Torr. white brittlebush Gnaphalium wrightii Gray cudweed Gutierrezia sarothrae (Pursh) Britt. & Rusby broom snakeweed Juncus balticus Willd. wire rush Juncus torreyi Coville rush Machaeranthera pinnatifida var. gooddingii (A. Nels.) B.L. Turner & Hartman spiny goldenweed Muhlenbergia asperifolia (Nees & Meyen ex Trin.) Parodi scratch grass Perityle congesta (M.E. Jones) Shinners rock daisy Physalis hederaefolia Gray var. fendleri (Gray) Cronq. Fendler groundcherry Plantago major L. common plantain Schizachyrium scoparium (Michx.) Nash var. scoparium little bluestem Sporobolus flexuosus (Thurb. ex Vasey) Rydb. mesa dropseed Stephanomeria pauciflora (Torr) A. Nels desert straw Canyon: Cranberry Canyon Genus / Species / Authority Common Names Acacia greggii Gray catclaw acacia Andropogon glomeratus (Walt.) B.S.P. bushy beardgrass Aristida arizonica Vasey Arizona three awn Atriplex sp. Baccharis salicifolia (Ruiz & Pavón) Pers. baccharis, seep willow Baccharis sergiloides Gray waterweed Bebbia juncea (Benth.) Greene var. aspera Greene chuckwalla's delight Bothriochloa barbinodis (Lag.) Herter cane bluestem Camissonia multijuga (S. Wats.) Raven camissonia, frost-stem suncup Cladium californicum (S. Wats.) O'Neill sawgrass Datura wrightii Regel sacred datura Encelia farinosa Gray ex Torr. white brittlebush Funastrum cynanchoides (Dcne.) Schlechter ssp. cynanchoides climbing milkweed Gutierrezia sarothrae (Pursh) Britt. & Rusby broom snakeweed Imperata brevifolia Vasey satintail Pleuraphis jamesii Torr. galleta Porophyllum gracile Benth. pore-leaf, odora Solidago velutina Sphaeralcea sp. Sporobolus cryptandrus (Torr.) Gray sand dropseed Stephanomeria pauciflora (Torr) A. Nels desert straw Typha sp. Canyon: Specter Chasm Genus / Species / Authority Common Names Acacia greggii Gray catclaw acacia Agave utahensis Engelm. var. kaibabensis (McKelvey) Breitung century plant Ambrosia dumosa (Gray) Payne white bursage Aristida adscensionis L. six-weeks three-awn Aristida arizonica Vasey Arizona three awn Astragalus praelongus Sheldon Baccharis sergiloides Gray waterweed Bebbia juncea (Benth.) Greene var. aspera Greene chuckwalla's delight Bothriochloa barbinodis (Lag.) Herter cane bluestem Brickellia atractyloides Gray spiny brickellbush Brickellia longifolia S. Wats. longleaf brickellbush Camissonia multijuga (S. Wats.) Raven camissonia, frost-stem suncup Cryptantha pterocarya (Torr.) Greene wing nut cryptantha Dasyochloa pulchella (Kunth) Willd. ex Rydb. fluff grass Echinocactus polycephalus var. polycephalus Englem. & Bigel multi-headed barrel cactus, cottontop Encelia farinosa Gray ex Torr. white brittlebush Encelia resinifera Gray white brittlebush Ephedra sp. (use when unknown) Eriogonum deflexum Torr. skeleton weed Erodium cicutarium (L.) L'Hér. ex Ait. filaree, stork's bill Escobaria grahamii Engelm. var. grahamii pincushion cactus, arizona fishhook Eucnide urens (Parry ex Gray) Parry rock nettle, sting bush Ferocactus cylindraceus (Engelm.) Orcutt var. cylindraceus California barrel cactus Galium stellatum Kellogg desert bedstraw Gutierrezia sarothrae (Pursh) Britt. & Rusby broom snakeweed Hedeoma oblongifolia (Gray) Heller mock pennyroyal Isocoma acradenia (Greene) Greene alkali goldenbush Lepidium montanum Nutt. peppergrass Machaeranthera pinnatifida var. gooddingii (A. Nels.) B.L. Turner & Hartman spiny goldenweed Mentzelia tricuspis Gray shiny-leaved blazing star Muhlenbergia asperifolia (Nees & Meyen ex Trin.) Parodi scratch grass Nicotiana trigonophylla Dunal desert tobacco Canyon: Specter Chasm continued Genus / Species / Authority Common Names Nolina microcarpa S. Wats. beargrass Opuntia polyacantha Haw. plains prickly pear Opuntia sp. Parietaria hespera Hinton pellitory Peucephyllum schottii Gray pigmy cedar Phacelia crenulata Torr. ex S. Wats. notch-leaf scorpion-weed Physalis hederifolia Gray ivy leaf groundcherry Pleuraphis jamesii Torr. galleta Porophyllum gracile Benth. pore-leaf, odora Silene antirrhina L. sleepy catchfly Sonchus asper (L.) Hill spiny-leaved sow thistle Sphaeralcea sp. Stanleya pinnata (Pursh) Britt. prince's plume, desert plume Stephanomeria pauciflora (Torr) A. Nels desert straw Thelypodium integrifolium (Nutt.) Endl. ex Walp. ssp. longicarpum Al-Shehbaz thelypodium Vulpia octoflora (Walt.) Rydb. six-weeks fescue Canyon: Cove Canyon Genus / Species / Authority Common Names Acacia greggii Gray catclaw acacia Adenophyllum porophylloides (Gray) Strother San Felipe Dyssodia Allionia incarnata L. trailing four o'clock Anulocaulis leiosolenus (Torr.) Standl. var. leiosolenus ringstem Aquilegia chrysantha Gray golden columbine Aristida adscensionis L. six-weeks three-awn Aristida arizonica Vasey Arizona three awn Artemisia ludoviciana Nutt. Louisiana sage Astragalus praelongus Sheldon Baccharis salicifolia (Ruiz & Pavón) Pers. baccharis, seep willow Baccharis sarothroides Gray broom baccharis Baileya multiradiata Harvey & Gray ex Gray desert marigold Bebbia juncea (Benth.) Greene var. aspera Greene chuckwalla's delight Bothriochloa saccharoides (Sw.) Rydb. silver beardgrass Brickellia longifolia S. Wats. longleaf brickellbush Bromus diandrus Roth ripgut grass Bromus rubens L. foxtail chess, red brome Camissonia multijuga (S. Wats.) Raven camissonia, frost-stem suncup Conyza canadensis (L.) Cronq. horseweed Cryptantha sp. (use when unknown) Dasyochloa pulchella (Kunth) Willd. ex Rydb. fluff grass Descurainia sp. Encelia farinosa Gray ex Torr. white brittlebush Ephedra sp. (use when unknown) Epipactis gigantea Dougl. ex Hook. giant helleborine Eriogonum inflatum Torr. & Frém. desert trumpet Eucnide urens (Parry ex Gray) Parry rock nettle, sting bush Flaveria macdougalii Theroux, Pinkava & Keil macdougal's flaveria Funastrum cynanchoides (Dcne.) Schlechter ssp. cynanchoides climbing milkweed Gutierrezia sarothrae (Pursh) Britt. & Rusby broom snakeweed Hedeoma oblongifolia (Gray) Heller mock pennyroyal Hesperodoria salicina (Blake) Nesom burroweed Isocoma acradenia (Greene) Greene alkali goldenbush Larrea tridentata (Sessé & Moc. ex DC.) Coville creosotebush Lepidium sp. Lycium sp. Canyon: Cove Canyon continued Genus / Species / Authority Common Names Maurandella antirrhiniflora (Humb. & Bonpl. ex Willd.) Rothm. twining snapdragon, blue snapdragon vine Mimulus cardinalis Dougl. ex Benth. scarlet monkeyflower Muhlenbergia asperifolia (Nees & Meyen ex Trin.) Parodi scratch grass Nicotiana trigonophylla Dunal desert tobacco Nolina microcarpa S. Wats. beargrass Opuntia phaeacantha Engelm. desert prickly pear, engelmann prickly pear Parietaria hespera Hinton pellitory Perityle congesta (M.E. Jones) Shinners rock daisy Perityle emoryi Torr. emory rock daisy Petrophyton caespitosum (Nutt.) Rydb. mat rockspirea Phacelia sp. (use when unknown) Physalis hederifolia Gray ivy leaf groundcherry Plantago ovata Forsk. woolly plantain, inland plantain Pleuraphis jamesii Torr. galleta Polypogon monspeliensis (L.) Desf. rabbitfoot grass Polypogon viridis (Gouan) Breistr. beardless rabbitsfoot grass Porophyllum gracile Benth. pore-leaf, odora Prosopis glandulosa Torr. honey mesquite Psilostrophe sp. Salsola tragus L.; Salsola iberica Sennen & Pau. russian thistle Setaria verticillata (L.) Beauv. bur bristlegrass Solanum americanum P. Mill. american nightshade Solanum sp. Sonchus asper (L.) Hill spiny-leaved sow thistle Sphaeralcea parvifolia A. Nels. littleleaf globe mallow Sporobolus cryptandrus (Torr.) Gray sand dropseed Stanleya pinnata (Pursh) Britt. prince's plume, desert plume Stephanomeria pauciflora (Torr) A. Nels desert straw Thelypodium integrifolium (Nutt.) Endl. ex Walp. ssp. longicarpum Al-Shehbaz thelypodium Thymophylla pentachaeta var. pentachaeta (DC.) Small fetid Marigold Tiquilia latior (I.M. Johnston) A. Richards. hispid coldenia Vulpia octoflora (Walt.) Rydb. six-weeks fescue Xylorhiza tortifolia (Torr. & Gray) Greene mohave aster Zannichellia palustris L. common poolmat Ziziphus obtusifolia (Hook. ex Torr. & Gray) Gray var. obtusifolia greythorn APPENDIX H Tamarisk Eradication and Restoration of 63 Tributaries Project Press and Articles If you are interested in obtaining the information contained in this appendix, please contact: Lori J. Makarick Restoration Biologist Grand Canyon National Park 823 North San Francisco, Suite B Flagstaff, AZ 86001-3265 Phone: (928) 635-0139 Email: Lori_Makarick@nps.gov APPENDIX I Tamarisk Eradication and Restoration of 63 Tributaries Project Implementation Map If you are interested in obtaining the information contained in this appendix, please contact: Lori J. Makarick Restoration Biologist Grand Canyon National Park 823 North San Francisco, Suite B Flagstaff, AZ 86001-3265 Phone: (928) 635-0139 Email: Lori_Makarick@nps.gov