| APPROACH:
Study microbial diversity in a series of long-term forest management experiments. Use environmental manipulations (such as elevated CO2)to alter plant tissue quality and the forms of crbon released to the soil; then, explore the impact of these changes on soil microbial processes such as decomposition, mineralization, and the formation of stable compounds. Study soil animals, decomposition, mineralization, microbial diversity and enzyme activity in a series of long-term experimental plots that simulate chronic N deposition. Study soil animals and mycorrhizal fungal taxa in the FACTs II FACE experiment in Rhinelander, Wisconsin. Evaluate existing studies of soil pesticide application and simulation of root herbivory.
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CRIS NUMBER: 0197346
SUBFILE: CRIS
PROJECT NUMBER: NC-4159-2
SPONSOR AGENCY: FS
PROJECT TYPE: USDA INHOUSE
PROJECT STATUS: TERMINATED
MULTI-STATE PROJECT NUMBER: (N/A)
START DATE: Sep 6, 2001
TERMINATION DATE: Sep 6, 2006
GRANT PROGRAM: (N/A)
GRANT PROGRAM AREA: (N/A)
CLASSIFICATION
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| 102 | 3199 | 1070 | 6.2 | 10% |
| 123 | 4099 | 1070 | 6.3 | 25% |
| 133 | 3199 | 1070 | 6.1 | 30% |
| 133 | 4020 | 1070 | 6.1 | 10% |
| 133 | 4099 | 1070 | 6.1 | 25% |
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CLASSIFICATION HEADINGS
KA123 - Management and Sustainability of Forest Resources
KA102 - Soil, Plant, Water, Nutrient Relationships
KA133 - Pollution Prevention and Mitigation
S4099 - Microorganisms, general/other
S3199 - Invertebrates, general/other
S4020 - Fungi
F1070 - Ecology
G6.2 - Enhance Soil Quality for Productive Working Lands
G6.3 - Protect and Manage Forests and Rangelands
G6.1 - Ensure Clean Water and Air
RESEARCH EFFORT CATEGORIES
| BASIC |
70% |
| APPLIED |
20% |
| DEVELOPMENTAL |
10% |
KEYWORDS: biodiversity; mycorrhizae; soil arthropods; air pollution; soil microbiology; forest management; environmental impact; nitrogen; atmospheric deposition; carbon dioxide; carbon dioxide enrichment; soil plant nutrient relations; pollution control; resource management; species composition; soil microorganisms; microbial ecology; carbon; ozone; tree growth; ecosystem management
PROGRESS: Oct 1, 2006 TO Sep 30, 2007
2.1 In collaboration with Michigan Technological University and the University of Michigan, field work was continued to directly address the saprophytic and mycorrhizal fungal responses to N inputs in sugar maple stands, and to determine their role in altered soil respiration in response to N inputs. We found lower abundance of arbuscular mycorrhizal fungi in nitrogen-treated plots. 2.2 Root samples were collected for a third year to evaluate the effects of elevated ozone and carbon dioxide on mycorrhizal fungal communities using the AspenFACE study in Rhinelander, Wisconsin. Mycorrhizal fungal community analysis was conducted. In addition, sporocarps of mycorrhizal fungi were collected in the AspenFACE site. We found that ozone treatment has led to a dramatic decline in ectomycorrhizal fungal sporocarp production and community structure, but that carbon dioxide reversed many of these effects. Investigations into the causal mechanisms for this decline are underway,
including work on the effects of treatments on microbial biomass and respiration rates. 2.3 Work was continued to study the role of native and non-native earthworms in affecting ecosystem processes in the Lake States region. The effect of these earthworms on soil C pools and distribution, root distribution, and soil respiration were investigated. Short-term losses of soil C from surface horizons are partially offset by C accumulation deeper in the soil. 2.4 A study on the controls of the biogeography of non-native soil organisms was undertaken, and analyses were completed. Strong relationships were found with latitude, human population density, and distance from coasts for several taxonomic groups. There was a divergence of the patterns of species richness for native and introduced taxa. Of particular note was a northern peak of introduced species richness for several taxonomic groups, including Carabidae, Curculionidae, Oligochaeta and Isopoda; higher introduced species richness near
coasts; and higher introduced species richness in areas of higher population density. 2.4 Field research was continued on a study of root herbivory by invasive weevils in the Lake States. Manipulative experiments, combined with minirhizotron systems are being used to examine the effect of these weevils on root turnover rates. 2.5 Two graduate students were supported fully or in part by funds associated with this project.
IMPACT: 2006-10-01 TO 2007-09-30
Understanding the impacts soil organisms have on forests, and the effects that forests have on soil organisms, could alter our perspectives on management impacts to forests. In many cases environmental effects on forests can be mediated by, or resisted by, soil organisms. By understanding the mechanisms by which soil organisms reflect and mediate environmental impacts on forests, we will increase the precision of our ability to assess how a given environmental change will impact forest ecosystems
PUBLICATION INFORMATION: 2006-10-01 TO 2007-09-30
Lilleskov, Erik A.; Parrent, Jeri L. 2007. Can we develop general predictive models of mycorrhizal fungal community-environment relationships? New Phytologist [Apr v 174 no 2].
PROJECT CONTACT INFORMATION
| NAME: |
Friend, A. L. |
| PHONE: |
906-482-6303 |
| FAX: |
906-482-6355 |
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