Diverse sediment microbiota shape methane emission temperature sensitivity in Arctic lakes.

Autor: Emerson JB; Department of Microbiology, The Ohio State University, 496W 12th Ave, Columbus, OH, 43210, USA. jbemerson@ucdavis.edu.; Department of Plant Pathology, University of California, Davis, One Shields Ave, Davis, CA, 95616, USA. jbemerson@ucdavis.edu., Varner RK; Department of Earth Sciences, University of New Hampshire, 56 College Road, Durham, NH, 03824, USA. ruth.varner@unh.edu.; Earth Systems Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, 8 College Road, Durham, NH, 03824, USA. ruth.varner@unh.edu., Wik M; Department of Geological Sciences, Stockholm University, Stockholm, 106 91, Sweden., Parks DH; Australian Centre for Ecogenomics, School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Australia., Neumann RB; Civil & Environmental Engineering, University of Washington, 201 More Hall, Box 352700, Seattle, WA, 98195-2700, USA., Johnson JE; Department of Earth Sciences, University of New Hampshire, 56 College Road, Durham, NH, 03824, USA., Singleton CM; Australian Centre for Ecogenomics, School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Australia.; Center for Microbial Communities, Department of Chemistry and Bioscience, Aalborg University, Aalborg, 9220, Denmark., Woodcroft BJ; Australian Centre for Ecogenomics, School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Australia., Tollerson R 2nd; Department of Microbiology, The Ohio State University, 496W 12th Ave, Columbus, OH, 43210, USA.; Department of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, 91106, USA., Owusu-Dommey A; Department of Environmental Science, University of Arizona, Tucson, AZ, 85721, USA.; Parkland Hospital, 5200 Harry Hines Blvd., Dallas, TX, 75235, USA., Binder M; Department of Environmental Science, University of Arizona, Tucson, AZ, 85721, USA.; John C. Lincoln Health Network, 34975N North Valley Pkwy Ste 100, Phoenix, AZ, 85086, USA., Freitas NL; Department of Environmental Science, University of Arizona, Tucson, AZ, 85721, USA.; Energy and Resources Group, University of California, Berkeley, USA., Crill PM; Department of Geological Sciences, Stockholm University, Stockholm, 106 91, Sweden., Saleska SR; Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ, 85721, USA., Tyson GW; Australian Centre for Ecogenomics, School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, 4072, Australia.; Centre for Microbiome Research, Queensland University of Technology, 37 Kent St, Woolloongabba, QLD, 4102, Australia., Rich VI; Department of Microbiology, The Ohio State University, 496W 12th Ave, Columbus, OH, 43210, USA. rich.270@osu.edu.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2021 Oct 05; Vol. 12 (1), pp. 5815. Date of Electronic Publication: 2021 Oct 05.
DOI: 10.1038/s41467-021-25983-9
Abstrakt: Northern post-glacial lakes are significant, increasing sources of atmospheric carbon through ebullition (bubbling) of microbially-produced methane (CH 4 ) from sediments. Ebullitive CH 4 flux correlates strongly with temperature, reflecting that solar radiation drives emissions. However, here we show that the slope of the temperature-CH 4 flux relationship differs spatially across two post-glacial lakes in Sweden. We compared these CH 4 emission patterns with sediment microbial (metagenomic and amplicon), isotopic, and geochemical data. The temperature-associated increase in CH 4 emissions was greater in lake middles-where methanogens were more abundant-than edges, and sediment communities were distinct between edges and middles. Microbial abundances, including those of CH 4 -cycling microorganisms and syntrophs, were predictive of porewater CH 4 concentrations. Results suggest that deeper lake regions, which currently emit less CH 4 than shallower edges, could add substantially to CH 4 emissions in a warmer Arctic and that CH 4 emission predictions may be improved by accounting for spatial variations in sediment microbiota.
(© 2021. The Author(s).)
Databáze: MEDLINE
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