LTER:  Microbial Ecology of Ectomycorrhizal Mats in a       Douglas-Fir Ecosystem
{'Code': '08010208', 'Directorate': {'Abbreviation': 'BIO', 'LongName': 'Direct For Biological Sciences'}, 'Division': {'Abbreviation': 'DEB', 'LongName': 'Division Of Environmental Biology'}}
{'SignBlockName': 'Lindsay Fox', 'PO_EMAI': None, 'PO_PHON': None}
At least two ectomycorrhizal fungi, Hysterangium setchellii                and Gautieria monticola, form extensive hyphal mats in the soils                of coniferous forests of the Pacific Northwest.  Other                          Hysterangium species form similar mats in coniferous and                        deciduous forests throughout the world, including H. gardneri in                association with Eucalyptus.  Preliminary research has                          demonstrated that the rhizosphere communities dominated by the                  first two fungi have significantly elevated microbial biomass,                  respiration rates and altered levels of seven enzymes responsible               for organic matter decomposition when compared to adjacent                      uncolonized soils.  Since these mats offer discrete units to                    study the influence of ectomycorrhizae on the microbial ecology                 of the rhizosphere community, we propose to compare the above                   three mat communities with uncolonized soils in terms of:  fungal               and bacterial biomass, community respiration and enzyme                         activities; the partitioning of nitrogen and phosporus into                     labile and recalcitrant pools;  the effects of mat chemistry on                 enzyme activities; enzyme production by pure fungal cultures; and               the role of phenolic-coupling enzymes in rhizosphere processes.
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[{'Code': '1128', 'Text': 'Population & Community Ecology'}, {'Code': '1129', 'Text': 'LONG-TERM PROJCTS IN ENVIR BIO'}]
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