Climate warming has direct and indirect effects on microbes associated with carbon cycling in northern lakes
Abstract Northern lakes disproportionately influence the global carbon cycle, and may do so more in the future depending on how their microbial communities respond to climate warming. Microbial communities can change because of the direct effects of climate warming on their metabolism and the indire...
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Online Access: | http://dx.doi.org/10.1111/gcb.16655 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.16655 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.16655 |
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crwiley:10.1111/gcb.16655 2024-09-15T18:29:23+00:00 Climate warming has direct and indirect effects on microbes associated with carbon cycling in northern lakes Winder, Johanna C. Braga, Lucas P. P. Kuhn, McKenzie A. Thompson, Lauren M. Olefeldt, David Tanentzap, Andrew J. H2020 European Research Council 2023 http://dx.doi.org/10.1111/gcb.16655 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.16655 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.16655 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Global Change Biology volume 29, issue 11, page 3039-3053 ISSN 1354-1013 1365-2486 journal-article 2023 crwiley https://doi.org/10.1111/gcb.16655 2024-08-06T04:16:47Z Abstract Northern lakes disproportionately influence the global carbon cycle, and may do so more in the future depending on how their microbial communities respond to climate warming. Microbial communities can change because of the direct effects of climate warming on their metabolism and the indirect effects of climate warming on groundwater connectivity from thawing of surrounding permafrost, especially at lower landscape positions. Here we used shotgun metagenomics to compare the taxonomic and functional gene composition of sediment microbes in 19 peatland lakes across a 1600‐km permafrost transect in boreal western Canada. We found microbes responded differently to the loss of regional permafrost cover than to increases in local groundwater connectivity. These results suggest that both the direct and indirect effects of climate warming, which were respectively associated with loss of permafrost and subsequent changes in groundwater connectivity interact to change microbial composition and function. Archaeal methanogens and genes involved in all major methanogenesis pathways were more abundant in warmer regions with less permafrost, but higher groundwater connectivity partly offset these effects. Bacterial community composition and methanotrophy genes did not vary with regional permafrost cover, and the latter changed similarly to methanogenesis with groundwater connectivity. Finally, we found an increase in sugar utilization genes in regions with less permafrost, which may further fuel methanogenesis. These results provide the microbial mechanism for observed increases in methane emissions associated with loss of permafrost cover in this region and suggest that future emissions will primarily be controlled by archaeal methanogens over methanotrophic bacteria as northern lakes warm. Our study more generally suggests that future predictions of aquatic carbon cycling will be improved by considering how climate warming exerts both direct effects associated with regional‐scale permafrost thaw and indirect effects ... Article in Journal/Newspaper permafrost Wiley Online Library Global Change Biology 29 11 3039 3053 |
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Wiley Online Library |
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English |
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Abstract Northern lakes disproportionately influence the global carbon cycle, and may do so more in the future depending on how their microbial communities respond to climate warming. Microbial communities can change because of the direct effects of climate warming on their metabolism and the indirect effects of climate warming on groundwater connectivity from thawing of surrounding permafrost, especially at lower landscape positions. Here we used shotgun metagenomics to compare the taxonomic and functional gene composition of sediment microbes in 19 peatland lakes across a 1600‐km permafrost transect in boreal western Canada. We found microbes responded differently to the loss of regional permafrost cover than to increases in local groundwater connectivity. These results suggest that both the direct and indirect effects of climate warming, which were respectively associated with loss of permafrost and subsequent changes in groundwater connectivity interact to change microbial composition and function. Archaeal methanogens and genes involved in all major methanogenesis pathways were more abundant in warmer regions with less permafrost, but higher groundwater connectivity partly offset these effects. Bacterial community composition and methanotrophy genes did not vary with regional permafrost cover, and the latter changed similarly to methanogenesis with groundwater connectivity. Finally, we found an increase in sugar utilization genes in regions with less permafrost, which may further fuel methanogenesis. These results provide the microbial mechanism for observed increases in methane emissions associated with loss of permafrost cover in this region and suggest that future emissions will primarily be controlled by archaeal methanogens over methanotrophic bacteria as northern lakes warm. Our study more generally suggests that future predictions of aquatic carbon cycling will be improved by considering how climate warming exerts both direct effects associated with regional‐scale permafrost thaw and indirect effects ... |
author2 |
H2020 European Research Council |
format |
Article in Journal/Newspaper |
author |
Winder, Johanna C. Braga, Lucas P. P. Kuhn, McKenzie A. Thompson, Lauren M. Olefeldt, David Tanentzap, Andrew J. |
spellingShingle |
Winder, Johanna C. Braga, Lucas P. P. Kuhn, McKenzie A. Thompson, Lauren M. Olefeldt, David Tanentzap, Andrew J. Climate warming has direct and indirect effects on microbes associated with carbon cycling in northern lakes |
author_facet |
Winder, Johanna C. Braga, Lucas P. P. Kuhn, McKenzie A. Thompson, Lauren M. Olefeldt, David Tanentzap, Andrew J. |
author_sort |
Winder, Johanna C. |
title |
Climate warming has direct and indirect effects on microbes associated with carbon cycling in northern lakes |
title_short |
Climate warming has direct and indirect effects on microbes associated with carbon cycling in northern lakes |
title_full |
Climate warming has direct and indirect effects on microbes associated with carbon cycling in northern lakes |
title_fullStr |
Climate warming has direct and indirect effects on microbes associated with carbon cycling in northern lakes |
title_full_unstemmed |
Climate warming has direct and indirect effects on microbes associated with carbon cycling in northern lakes |
title_sort |
climate warming has direct and indirect effects on microbes associated with carbon cycling in northern lakes |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1111/gcb.16655 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.16655 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.16655 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Global Change Biology volume 29, issue 11, page 3039-3053 ISSN 1354-1013 1365-2486 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/gcb.16655 |
container_title |
Global Change Biology |
container_volume |
29 |
container_issue |
11 |
container_start_page |
3039 |
op_container_end_page |
3053 |
_version_ |
1810470781529882624 |