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  • Monteux, SylvainSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Umeå universitet,Institutionen för ekologi, miljö och geovetenskap,Department of Soil and Environment, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden,Institutionen för mark och miljö (author)

Carbon and nitrogen cycling in Yedoma permafrost controlled by microbial functional limitations

  • Article/chapterEnglish2020

Publisher, publication year, extent ...

  • 2020-11-30
  • Nature Publishing Group,2020
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:umu-178230
  • https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-178230URI
  • https://doi.org/10.1038/s41561-020-00662-4DOI
  • https://res.slu.se/id/publ/108949URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • 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. Carbon dioxide emissions from permafrost thaw are substantially enhanced by relieving microbial functional limitations, according to incubation experiments on Yedoma permafrost.

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  • Keuper, FridaUmeå universitet,Institutionen för ekologi, miljö och geovetenskap,BioEcoAgro Joint Research Unit, INRAE, Barenton-Bugny, France(Swepub:umu)frke0005 (author)
  • Fontaine, Sebastien (author)
  • Gavazov, Konstantin,1983-Umeå universitet,Institutionen för ekologi, miljö och geovetenskap,Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Lausanne, Switzerland(Swepub:umu)koga0004 (author)
  • Hallin, SaraSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Department of Forest Mycology and Plant Pathology(Swepub:slu)48245 (author)
  • Juhanson, JaanisSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Department of Forest Mycology and Plant Pathology(Swepub:slu)93280 (author)
  • Krab, Eveline JSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Umeå universitet,Institutionen för ekologi, miljö och geovetenskap,Department of Soil and Environment, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden,Institutionen för mark och miljö(Swepub:umu)evkr0017 (author)
  • Revaillot, Sandrine (author)
  • Verbruggen, Erik (author)
  • Walz, JosefineUmeå universitet,Institutionen för ekologi, miljö och geovetenskap(Swepub:umu)jowa0200 (author)
  • Weedon, James T. (author)
  • Dorrepaal, EllenUmeå universitet,Institutionen för ekologi, miljö och geovetenskap(Swepub:umu)eldo0004 (author)
  • Umeå universitetInstitutionen för ekologi, miljö och geovetenskap (creator_code:org_t)
  • Sveriges lantbruksuniversitet

Related titles

  • In:Nature Geoscience: Nature Publishing Group13:12, s. 794-+1752-08941752-0908

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