globalchange  > 气候变化与战略
DOI: 10.1038/s41561-020-00662-4
论文题名:
Carbon and nitrogen cycling in Yedoma permafrost controlled by microbial functional limitations
作者: Monteux S.; Keuper F.; Fontaine S.; Gavazov K.; Hallin S.; Juhanson J.; Krab E.J.; Revaillot S.; Verbruggen E.; Walz J.; Weedon J.T.; Dorrepaal E.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2020
卷: 13, 期:12
起始页码: 794
结束页码: 798
语种: 英语
英文关键词: climate change ; community composition ; global change ; global climate ; in situ measurement ; microbial community ; nitrification ; physicochemical property ; soil chemistry ; soil organic matter ; vulnerability
英文摘要: Warming-induced microbial decomposition of organic matter in permafrost soils constitutes a climate-change feedback of uncertain magnitude. While physicochemical constraints on soil functioning are relatively well understood, the constraints attributable to microbial community composition remain unclear. Here we show that biogeochemical processes in permafrost can be impaired by missing functions in the microbial community—functional limitations—probably due to environmental filtering of the microbial community over millennia-long freezing. We inoculated Yedoma permafrost with a functionally diverse exogenous microbial community to test this mechanism by introducing potentially missing microbial functions. This initiated nitrification activity and increased CO2 production by 38% over 161 days. The changes in soil functioning were strongly associated with an altered microbial community composition, rather than with changes in soil chemistry or microbial biomass. The present permafrost microbial community composition thus constrains carbon and nitrogen biogeochemical processes, but microbial colonization, likely to occur upon permafrost thaw in situ, can alleviate such functional limitations. Accounting for functional limitations and their alleviation could strongly increase our estimate of the vulnerability of permafrost soil organic matter to decomposition and the resulting global climate feedback. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169650
Appears in Collections:气候变化与战略

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作者单位: Climate Impacts Research Centre—Department of Ecology and Environmental Sciences, Umeå University, Abisko, Sweden; Department of Soil and Environment, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden; BioEcoAgro Joint Research Unit, INRAE, Barenton-Bugny, France; UMR Écosystème Prairial—INRAE, VetAgro Sup, Clermont-Ferrand, France; Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Lausanne, Switzerland; Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden; Plants and Ecosystems—Department of Biology, Universiteit Antwerpen, Wilrijk, Belgium; Systems Ecology—Department of Ecological Sciences, Vrije Universiteit Amsterdam, Amsterdam, Netherlands

Recommended Citation:
Monteux S.,Keuper F.,Fontaine S.,et al. Carbon and nitrogen cycling in Yedoma permafrost controlled by microbial functional limitations[J]. Nature Geoscience,2020-01-01,13(12)
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