气候变化领域集成服务门户(CCPortal): Carbon and nitrogen cycling in Yedoma permafrost controlled by microbial functional limitations

CCPortal

DOI	10.1038/s41561-020-00662-4
	Carbon and nitrogen cycling in Yedoma permafrost controlled by microbial functional limitations
	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.
发表日期	2020
ISSN	17520894
起始页码	794
结束页码	798
卷号	13 期号:12
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.
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
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206813
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
推荐引用方式 GB/T 7714	Monteux S.,Keuper F.,Fontaine S.,et al. Carbon and nitrogen cycling in Yedoma permafrost controlled by microbial functional limitations[J],2020,13(12).
APA	Monteux S..,Keuper F..,Fontaine S..,Gavazov K..,Hallin S..,...&Dorrepaal E..(2020).Carbon and nitrogen cycling in Yedoma permafrost controlled by microbial functional limitations.Nature Geoscience,13(12).
MLA	Monteux S.,et al."Carbon and nitrogen cycling in Yedoma permafrost controlled by microbial functional limitations".Nature Geoscience 13.12(2020).