Abstract: LTER - Long-Term Ecological Research Program/Cedar Creek Natural History Area (CDR) LTER/CDR070 [Summary adapted from the LTER Core Data Set Catalog]: This experiment was established on top of subplots 24, 25, and 26 of CDR018. Sheet metal was installed to divide the subplots into four equal parts. The resulting 12 sub- subplots (4 per subplot = 12 per plot) were planted according to the following treatments where LC = Lespedeza capitata, AC = Amorpha canescens, PP = Petalostemum purpureum, and SS = Schizachyrium scoparium: 1. LC seed on top of established SS 2. AC seed on top of established SS 3. no seed added to established SS 4. PP seed on top of established SS 5. AC seed vs SS seed 6. LC seed vs SS seed 7. PP seed vs SS seed 8. LC seed vs AC seed vs PP seed vs SS seed 9. AC seed 10. LC seed 11. bare ground (no seeds added) 12. PP seed Proprietary limits: Investigators have priority over data for five years, but are interested in collaboration for novel comparisons before then. The Cedar Creek Natural History Area (CCNHA) is a 2200 hectare experimental ecological reserve operated by the University of Minnesota in cooperation with the Minnesota Academy of Sciences. CCNHA is located in Anoka and Isanti Counties north of Minneapolis/St. Paul. The site was established in 1940, was designated a National Natural Landmark by the National Park Service in 1975. In 1977 it was included as an Experimental Ecology Reserve in a proposed network, and in 1982 it was one of 11 sites in the U.S. selected by the National Science Foundation for funding of LTER. Cedar Creek lies at the boundary of prairie and forest and is dominated by uplands of oak savanna, prairie, hardwood forest, pine forests, and abandoned agricultural fields and lowlands of ash and cedar swamps, acid bogs, marshes, and sedge meadows. Cedar Creek LTER combines long-term experimentation and observation to examine the controls of successional dynamics and spatial patterning in ecosystems at the prairie-forest boundary. The LTER has established more than 1100 permanent, long-term experimental plots as well as 2300 permanent observational plots distributed across 22 old fields. The work of the Cedar Creek LTER focuses on mechanisms of plant competition for nutrients and light; dynamics of carbon and nitrogen in soil; controls of the primary productivity, species competition and species diversity of grasslands; herbivory, including feedback effects of herbivores on soils and plants; disturbance; and modeling and ecological theory. Information about the Long-Term Ecological Research (LTER) Program can be obtained from: LTER Network Office College of Forest Resources AR-10 University of Washington Seattle, WA 98195 Phone: 206-543-4853 FAX: 206-685-0790 Email: office@lternet.edu or National Science Foundation Division of Environmental Biology Long-Term Projects in Environmental Biology Phone: 703-306-1479 ext. 6430 Email: scollins@nsf.gov Information about LTER is also available on-line on most gopher servers and is also available on the World Wide Web (WWW) at 'http://lternet.edu/' References: Tilman, D. 1986. "Nitrogen-limited growth in plants from different successional stages". Ecology, Vol. 67, pp. 555-563. Tilman, D.; M. L. Cowan. 1989. "Growth of old field herbs on a nitrogen gradient". Functional Ecology, Vol. 3, pp. 425-438.
Purpose: This experiment was established on top of subplots 24, 25, and 26 of CDR018.

Progress: in work
Update Frequency: as needed

Theme Keywords: GCMD parameter keywords, EARTH SCIENCE >BIOSPHERE >ECOLOGICAL DYNAMICS >BIOGEOCHEMICAL CYCLES >, EARTH SCIENCE >BIOSPHERE >ECOLOGICAL DYNAMICS >BIOMASS >, EARTH SCIENCE >BIOSPHERE >ECOLOGICAL DYNAMICS >COMPETITION >, EARTH SCIENCE >BIOSPHERE >ECOLOGICAL DYNAMICS >HERBIVORY >, EARTH SCIENCE >BIOSPHERE >ECOLOGICAL DYNAMICS >NUTRIENT CYCLING >, EARTH SCIENCE >BIOSPHERE >ECOLOGICAL DYNAMICS >POPULATION DYNAMICS >, EARTH SCIENCE >BIOSPHERE >ECOLOGICAL DYNAMICS >PRIMARY PRODUCTION >, EARTH SCIENCE >BIOSPHERE >ECOLOGICAL DYNAMICS >SUCCESSION >, EARTH SCIENCE >BIOSPHERE >TERRESTRIAL HABITAT >FOREST HABITAT >, EARTH SCIENCE >BIOSPHERE >VEGETATION >FOREST COMPOSITION/STRUCTURE >, EARTH SCIENCE >BIOSPHERE >VEGETATION >HERBIVORY >, EARTH SCIENCE >BIOSPHERE >VEGETATION >NITROGEN >, EARTH SCIENCE >BIOSPHERE >VEGETATION >NUTRIENTS >, EARTH SCIENCE >BIOSPHERE >WETLANDS >MARSHES >, EARTH SCIENCE >LAND SURFACE >SOILS >ORGANIC MATTER >, none, CCNHA, CDR, CDR070, CEDAR CREEK, ECOSYSTEMS, FERTILIZATION, IDN_NODE GSFC/LTER_UMN, LEGUME COMPETITION, LTER, NH4NO3, NITROGEN, NSF, SOIL NITROGEN
Place Keywords: NORTH AMERICA, Minnesota, Anoka County, MN, Isanti County, MN

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