Disproportionate microbial responses to decadal drainage on a Siberian floodplain
Abstract Permafrost thaw induces soil hydrological changes which in turn affects carbon cycle processes in the Arctic terrestrial ecosystems. However, hydrological impacts of thawing permafrost on microbial processes and greenhouse gas (GHG) dynamics are poorly understood. This study examined change...
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Online Access: | http://dx.doi.org/10.1111/gcb.15785 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.15785 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.15785 |
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crwiley:10.1111/gcb.15785 2024-10-06T13:46:07+00:00 Disproportionate microbial responses to decadal drainage on a Siberian floodplain Kwon, Min Jung Tripathi, Binu M. Göckede, Mathias Shin, Seung Chul Myeong, Nu Ri Lee, Yoo Kyung Kim, Mincheol Korea Polar Research Institute Seventh Framework Programme 2021 http://dx.doi.org/10.1111/gcb.15785 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.15785 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.15785 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 27, issue 20, page 5124-5140 ISSN 1354-1013 1365-2486 journal-article 2021 crwiley https://doi.org/10.1111/gcb.15785 2024-09-11T04:10:35Z Abstract Permafrost thaw induces soil hydrological changes which in turn affects carbon cycle processes in the Arctic terrestrial ecosystems. However, hydrological impacts of thawing permafrost on microbial processes and greenhouse gas (GHG) dynamics are poorly understood. This study examined changes in microbial communities using gene and genome‐centric metagenomics on an Arctic floodplain subject to decadal drainage, and linked them to CO 2 and CH 4 flux and soil chemistry. Decadal drainage led to significant changes in the abundance, taxonomy, and functional potential of microbial communities, and these modifications well explained the changes in CO 2 and CH 4 fluxes between ecosystem and atmosphere—increased fungal abundances potentially increased net CO 2 emission rates and highly reduced CH 4 emissions in drained sites corroborated the marked decrease in the abundance of methanogens and methanotrophs. Interestingly, various microbial taxa disproportionately responded to drainage: Methanoregula , one of the key players in methanogenesis under saturated conditions, almost disappeared, and also Methylococcales methanotrophs were markedly reduced in response to drainage. Seven novel methanogen population genomes were recovered, and the metabolic reconstruction of highly correlated population genomes revealed novel syntrophic relationships between methanogenic archaea and syntrophic partners. These results provide a mechanistic view of microbial processes regulating GHG dynamics in the terrestrial carbon cycle, and disproportionate microbial responses to long‐term drainage provide key information for understanding the effects of warming‐induced soil drying on microbial processes in Arctic wetland ecosystems. Article in Journal/Newspaper Arctic permafrost Wiley Online Library Arctic Global Change Biology 27 20 5124 5140 |
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Wiley Online Library |
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English |
description |
Abstract Permafrost thaw induces soil hydrological changes which in turn affects carbon cycle processes in the Arctic terrestrial ecosystems. However, hydrological impacts of thawing permafrost on microbial processes and greenhouse gas (GHG) dynamics are poorly understood. This study examined changes in microbial communities using gene and genome‐centric metagenomics on an Arctic floodplain subject to decadal drainage, and linked them to CO 2 and CH 4 flux and soil chemistry. Decadal drainage led to significant changes in the abundance, taxonomy, and functional potential of microbial communities, and these modifications well explained the changes in CO 2 and CH 4 fluxes between ecosystem and atmosphere—increased fungal abundances potentially increased net CO 2 emission rates and highly reduced CH 4 emissions in drained sites corroborated the marked decrease in the abundance of methanogens and methanotrophs. Interestingly, various microbial taxa disproportionately responded to drainage: Methanoregula , one of the key players in methanogenesis under saturated conditions, almost disappeared, and also Methylococcales methanotrophs were markedly reduced in response to drainage. Seven novel methanogen population genomes were recovered, and the metabolic reconstruction of highly correlated population genomes revealed novel syntrophic relationships between methanogenic archaea and syntrophic partners. These results provide a mechanistic view of microbial processes regulating GHG dynamics in the terrestrial carbon cycle, and disproportionate microbial responses to long‐term drainage provide key information for understanding the effects of warming‐induced soil drying on microbial processes in Arctic wetland ecosystems. |
author2 |
Korea Polar Research Institute Seventh Framework Programme |
format |
Article in Journal/Newspaper |
author |
Kwon, Min Jung Tripathi, Binu M. Göckede, Mathias Shin, Seung Chul Myeong, Nu Ri Lee, Yoo Kyung Kim, Mincheol |
spellingShingle |
Kwon, Min Jung Tripathi, Binu M. Göckede, Mathias Shin, Seung Chul Myeong, Nu Ri Lee, Yoo Kyung Kim, Mincheol Disproportionate microbial responses to decadal drainage on a Siberian floodplain |
author_facet |
Kwon, Min Jung Tripathi, Binu M. Göckede, Mathias Shin, Seung Chul Myeong, Nu Ri Lee, Yoo Kyung Kim, Mincheol |
author_sort |
Kwon, Min Jung |
title |
Disproportionate microbial responses to decadal drainage on a Siberian floodplain |
title_short |
Disproportionate microbial responses to decadal drainage on a Siberian floodplain |
title_full |
Disproportionate microbial responses to decadal drainage on a Siberian floodplain |
title_fullStr |
Disproportionate microbial responses to decadal drainage on a Siberian floodplain |
title_full_unstemmed |
Disproportionate microbial responses to decadal drainage on a Siberian floodplain |
title_sort |
disproportionate microbial responses to decadal drainage on a siberian floodplain |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1111/gcb.15785 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.15785 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.15785 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost |
genre_facet |
Arctic permafrost |
op_source |
Global Change Biology volume 27, issue 20, page 5124-5140 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/gcb.15785 |
container_title |
Global Change Biology |
container_volume |
27 |
container_issue |
20 |
container_start_page |
5124 |
op_container_end_page |
5140 |
_version_ |
1812174450115739648 |