globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1909166117
论文题名:
A trait-based understanding of wood decomposition by fungi
作者: Lustenhouwer N.; Maynard D.S.; Bradford M.A.; Lindner D.L.; Oberle B.; Zanne A.E.; Crowther T.W.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:21
语种: 英语
英文关键词: Carbon cycle ; Decay rate ; Functional biogeography ; Fungal traits ; Wood decomposition
Scopus关键词: article ; biogeography ; carbon cycle ; decomposer ; decomposition ; drought stress ; field study ; fungus growth ; life history ; moisture ; nonhuman ; North America ; nutrient ; saprotroph ; carbon cycle ; classification ; ecosystem ; enzymology ; fungus ; fungus hyphae ; microbiology ; mycobiome ; physiology ; wood ; Carbon Cycle ; Ecosystem ; Fungi ; Hyphae ; Mycobiome ; North America ; Wood
英文摘要: As the primary decomposers of organic material in terrestrial ecosystems, fungi are critical agents of the global carbon cycle. Yet our ability to link fungal community composition to ecosystem functioning is constrained by a limited understanding of the factors accounting for different wood decomposition rates among fungi. Here we examine which traits best explain fungal decomposition ability by combining detailed trait-based assays on 34 saprotrophic fungi from across North America in the laboratory with a 5-y field study comprising 1,582 fungi isolated from 74 decomposing logs. Fungal growth rate (hyphal extension rate) was the strongest single predictor of fungal-mediated wood decomposition rate under laboratory conditions, and accounted for up to 27% of the in situ variation in decomposition in the field. At the individual level, decomposition rate was negatively correlated with moisture niche width (an indicator of drought stress tolerance) and with the production of nutrient-mineralizing extracellular enzymes. Together, these results suggest that decomposition rates strongly align with a dominance-tolerance life-history tradeoff that was previously identified in these isolates, forming a spectrum from slow-growing, stress-tolerant fungi that are poor decomposers to fast-growing, highly competitive fungi with fast decomposition rates. Our study illustrates how an understanding of fungal trait variation could improve our predictive ability of the early and midstages of wood decay, to which our findings are most applicable. By mapping our results onto the biogeographic distribution of the dominance-tolerance trade-off across North America, we approximate broad-scale patterns in intrinsic fungal-mediatedwood decomposition rates. © 2020 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164201
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作者单位: Lustenhouwer, N., Institute of Integrative Biology, ETH Zurich, Zurich, 8092, Switzerland, Department of Ecology and Evolution, University of California, Santa Cruz, CA 95060, United States; Maynard, D.S., Institute of Integrative Biology, ETH Zurich, Zurich, 8092, Switzerland, Department of Ecology and Evolution, University of Chicago, Chicago, IL 60637, United States; Bradford, M.A., School of Forestry and Environmental Studies, Yale University, New Haven, CT 06511, United States; Lindner, D.L., Northern Research Station, US Forest Service, Madison, WI 53726, United States; Oberle, B., Division of Natural Sciences, New College of Florida, Sarasota, FL 34243, United States; Zanne, A.E., Department of Biological Sciences, George Washington University, Washington, DC 20052, United States; Crowther, T.W., Institute of Integrative Biology, ETH Zurich, Zurich, 8092, Switzerland

Recommended Citation:
Lustenhouwer N.,Maynard D.S.,Bradford M.A.,et al. A trait-based understanding of wood decomposition by fungi[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(21)
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