Effects of a long-term anoxic warming scenario on microbial community structure and functional potential of permafrost-affected soil
Permafrost (PF)-affected soils are widespread in the Arctic and store about half the global soil organic carbon. This large carbon pool becomes vulnerable to microbial decomposition through PF warming and deepening of the seasonal thaw layer (active layer [AL]). Here we combined greenhouse gas (GHG)...
Published in: | Permafrost and Periglacial Processes |
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2021
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5007532 2023-05-15T15:06:42+02:00 Effects of a long-term anoxic warming scenario on microbial community structure and functional potential of permafrost-affected soil Yang, S. Liebner, S. Walz, J. Knoblauch, C. Bornemann, T. Probst, A. Wagner, D. Jetten, M. in't Zandt, M. 2021 application/pdf https://gfzpublic.gfz-potsdam.de/pubman/item/item_5007532 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5007532_5/component/file_5009125/5007532.pdf unknown info:eu-repo/semantics/altIdentifier/doi/10.1002/ppp.2131 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5007532 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5007532_5/component/file_5009125/5007532.pdf info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ CC-BY Permafrost and Periglacial Processes info:eu-repo/semantics/article 2021 ftgfzpotsdam https://doi.org/10.1002/ppp.2131 2022-09-14T05:57:59Z Permafrost (PF)-affected soils are widespread in the Arctic and store about half the global soil organic carbon. This large carbon pool becomes vulnerable to microbial decomposition through PF warming and deepening of the seasonal thaw layer (active layer [AL]). Here we combined greenhouse gas (GHG) production rate measurements with a metagenome-based assessment of the microbial taxonomic and metabolic potential before and after 5 years of incubation under anoxic conditions at a constant temperature of 4°C in the AL, PF transition layer, and intact PF. Warming led to a rapid initial release of CO2 and, to a lesser extent, CH4 in all layers. After the initial pulse, especially in CO2 production, GHG production rates declined and conditions became more methanogenic. Functional gene-based analyses indicated a decrease in carbon- and nitrogen-cycling genes and a community shift to the degradation of less-labile organic matter. This study reveals low but continuous GHG production in long-term warming scenarios, which coincides with a decrease in the relative abundance of major metabolic pathway genes and an increase in carbohydrate-active enzyme classes. Article in Journal/Newspaper Arctic permafrost Permafrost and Periglacial Processes GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Arctic Permafrost and Periglacial Processes |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
unknown |
description |
Permafrost (PF)-affected soils are widespread in the Arctic and store about half the global soil organic carbon. This large carbon pool becomes vulnerable to microbial decomposition through PF warming and deepening of the seasonal thaw layer (active layer [AL]). Here we combined greenhouse gas (GHG) production rate measurements with a metagenome-based assessment of the microbial taxonomic and metabolic potential before and after 5 years of incubation under anoxic conditions at a constant temperature of 4°C in the AL, PF transition layer, and intact PF. Warming led to a rapid initial release of CO2 and, to a lesser extent, CH4 in all layers. After the initial pulse, especially in CO2 production, GHG production rates declined and conditions became more methanogenic. Functional gene-based analyses indicated a decrease in carbon- and nitrogen-cycling genes and a community shift to the degradation of less-labile organic matter. This study reveals low but continuous GHG production in long-term warming scenarios, which coincides with a decrease in the relative abundance of major metabolic pathway genes and an increase in carbohydrate-active enzyme classes. |
format |
Article in Journal/Newspaper |
author |
Yang, S. Liebner, S. Walz, J. Knoblauch, C. Bornemann, T. Probst, A. Wagner, D. Jetten, M. in't Zandt, M. |
spellingShingle |
Yang, S. Liebner, S. Walz, J. Knoblauch, C. Bornemann, T. Probst, A. Wagner, D. Jetten, M. in't Zandt, M. Effects of a long-term anoxic warming scenario on microbial community structure and functional potential of permafrost-affected soil |
author_facet |
Yang, S. Liebner, S. Walz, J. Knoblauch, C. Bornemann, T. Probst, A. Wagner, D. Jetten, M. in't Zandt, M. |
author_sort |
Yang, S. |
title |
Effects of a long-term anoxic warming scenario on microbial community structure and functional potential of permafrost-affected soil |
title_short |
Effects of a long-term anoxic warming scenario on microbial community structure and functional potential of permafrost-affected soil |
title_full |
Effects of a long-term anoxic warming scenario on microbial community structure and functional potential of permafrost-affected soil |
title_fullStr |
Effects of a long-term anoxic warming scenario on microbial community structure and functional potential of permafrost-affected soil |
title_full_unstemmed |
Effects of a long-term anoxic warming scenario on microbial community structure and functional potential of permafrost-affected soil |
title_sort |
effects of a long-term anoxic warming scenario on microbial community structure and functional potential of permafrost-affected soil |
publishDate |
2021 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5007532 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5007532_5/component/file_5009125/5007532.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost Permafrost and Periglacial Processes |
genre_facet |
Arctic permafrost Permafrost and Periglacial Processes |
op_source |
Permafrost and Periglacial Processes |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/ppp.2131 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5007532 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5007532_5/component/file_5009125/5007532.pdf |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/ppp.2131 |
container_title |
Permafrost and Periglacial Processes |
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1766338250415276032 |