Plant species richness, elevated CO 2 , and atmospheric nitrogen deposition alter soil microbial community composition and function
dc.contributor.author | Chung, Haegeun | en_US |
dc.contributor.author | Zak, Donald R. | en_US |
dc.contributor.author | Reich, Peter B. | en_US |
dc.contributor.author | Ellsworth, David S. | en_US |
dc.date.accessioned | 2010-06-01T19:33:22Z | |
dc.date.available | 2010-06-01T19:33:22Z | |
dc.date.issued | 2007-05 | en_US |
dc.identifier.citation | CHUNG, HAEGEUN; ZAK, DONALD R.; REICH, PETER B.; ELLSWORTH, DAVID S. (2007). "Plant species richness, elevated CO 2 , and atmospheric nitrogen deposition alter soil microbial community composition and function." Global Change Biology 13(5): 980-989. <http://hdl.handle.net/2027.42/72693> | en_US |
dc.identifier.issn | 1354-1013 | en_US |
dc.identifier.issn | 1365-2486 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/72693 | |
dc.description.abstract | We determined soil microbial community composition and function in a field experiment in which plant communities of increasing species richness were exposed to factorial elevated CO 2 and nitrogen (N) deposition treatments. Because elevated CO 2 and N deposition increased plant productivity to a greater extent in more diverse plant assemblages, it is plausible that heterotrophic microbial communities would experience greater substrate availability, potentially increasing microbial activity, and accelerating soil carbon (C) and N cycling. We, therefore, hypothesized that the response of microbial communities to elevated CO 2 and N deposition is contingent on the species richness of plant communities. Microbial community composition was determined by phospholipid fatty acid analysis, and function was measured using the activity of key extracellular enzymes involved in litter decomposition. Higher plant species richness, as a main effect, fostered greater microbial biomass, cellulolytic and chitinolytic capacity, as well as the abundance of saprophytic and arbuscular mycorrhizal (AM) fungi. Moreover, the effect of plant species richness on microbial communities was significantly modified by elevated CO 2 and N deposition. For instance, microbial biomass and fungal abundance increased with greater species richness, but only under combinations of elevated CO 2 and ambient N, or ambient CO 2 and N deposition. Cellobiohydrolase activity increased with higher plant species richness, and this trend was amplified by elevated CO 2 . In most cases, the effect of plant species richness remained significant even after accounting for the influence of plant biomass. Taken together, our results demonstrate that plant species richness can directly regulate microbial activity and community composition, and that plant species richness is a significant determinant of microbial response to elevated CO 2 and N deposition. The strong positive effect of plant species richness on cellulolytic capacity and microbial biomass indicate that the rates of soil C cycling may decline with decreasing plant species richness. | en_US |
dc.format.extent | 178052 bytes | |
dc.format.extent | 3109 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.publisher | Blackwell Publishing Ltd | en_US |
dc.rights | © 2007 Blackwell Publishing Ltd | en_US |
dc.subject.other | Complementary Resource Use | en_US |
dc.subject.other | Extracellular Enzymes | en_US |
dc.subject.other | FACE (Free-air Carbon Dioxide Enrichment) | en_US |
dc.subject.other | Global Change | en_US |
dc.subject.other | Grassland Ecosystem | en_US |
dc.subject.other | Microbial Biomass | en_US |
dc.subject.other | Phospholipid Fatty Acid (PLFA) | en_US |
dc.subject.other | Plant Diversity | en_US |
dc.subject.other | Soil C Cycling | en_US |
dc.subject.other | Soil Fungi | en_US |
dc.title | Plant species richness, elevated CO 2 , and atmospheric nitrogen deposition alter soil microbial community composition and function | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Ecology and Evolutionary Biology | en_US |
dc.subject.hlbsecondlevel | Geology and Earth Sciences | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | School of Natural Resources & Environment, 440 Church Street, University of Michigan, Ann Arbor, MI 48109, USA , | en_US |
dc.contributor.affiliationum | † Department of Ecology and Evolutionary Biology, 830 North University Avenue, University of Michigan, Ann Arbor, MI 48109, USA , | en_US |
dc.contributor.affiliationother | † Department of Forest Resources, 1530 Cleveland Avenue, University of Minnesota, St Paul, MN 55108, USA | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/72693/1/j.1365-2486.2007.01313.x.pdf | |
dc.identifier.doi | 10.1111/j.1365-2486.2007.01313.x | en_US |
dc.identifier.source | Global Change Biology | en_US |
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dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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