Abrupt permafrost thaw triggers activity of copiotrophs and microbiome predators
Permafrost soils store a substantial part of the global soil carbon and nitrogen. However, global warming causes abrupt erosion and gradual thaw, which make these stocks vulnerable to microbial decomposition into greenhouse gases. Here, we investigated the microbial response to abrupt in situ permaf...
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Online Access: | https://hdl.handle.net/10037/31913 https://doi.org/10.1093/femsec/fiad123 |
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ftunivtroemsoe:oai:munin.uit.no:10037/31913 2023-12-31T10:21:49+01:00 Abrupt permafrost thaw triggers activity of copiotrophs and microbiome predators Scheel, Maria Zervas, Athanasios Rijkers, Ruud Tveit, Alexander Tøsdal Ekelund, Flemming Campuzano Jiménez, Francisco Christensen, Torben R. Jacobsen, Carsten S. 2023-10-05 https://hdl.handle.net/10037/31913 https://doi.org/10.1093/femsec/fiad123 eng eng Oxford University Press FEMS Microbiology Ecology Scheel, Zervas, Rijkers, Tveit, Ekelund, Campuzano Jiménez, Christensen, Jacobsen. Abrupt permafrost thaw triggers activity of copiotrophs and microbiome predators. FEMS Microbiology Ecology. 2023;99(11) FRIDAID 2196310 doi:10.1093/femsec/fiad123 0168-6496 1574-6941 https://hdl.handle.net/10037/31913 Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by-nc/4.0 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2023 ftunivtroemsoe https://doi.org/10.1093/femsec/fiad123 2023-12-07T00:08:35Z Permafrost soils store a substantial part of the global soil carbon and nitrogen. However, global warming causes abrupt erosion and gradual thaw, which make these stocks vulnerable to microbial decomposition into greenhouse gases. Here, we investigated the microbial response to abrupt in situ permafrost thaw. We sequenced the total RNA of a 1 m deep soil core consisting of up to 26 500-year-old permafrost material from an active abrupt erosion site. We analysed the microbial community in the active layer soil, the recently thawed, and the intact permafrost, and found maximum RNA:DNA ratios in recently thawed permafrost indicating a high microbial activity. In thawed permafrost, potentially copiotrophic Burkholderiales and Sphingobacteriales, but also microbiome predators dominated the community. Overall, both thaw-dependent and long-term soil properties significantly correlated with changes in community composition, as did microbiome predator abundance. Bacterial predators were dominated in shallower depths by Myxococcota, while protozoa, especially Cercozoa and Ciliophora, almost tripled in relative abundance in thawed layers. Our findings highlight the ecological importance of a diverse interkingdom and active microbial community highly abundant in abruptly thawing permafrost, as well as predation as potential biological control mechanism. Article in Journal/Newspaper permafrost University of Tromsø: Munin Open Research Archive FEMS Microbiology Ecology 99 11 |
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Open Polar |
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University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
description |
Permafrost soils store a substantial part of the global soil carbon and nitrogen. However, global warming causes abrupt erosion and gradual thaw, which make these stocks vulnerable to microbial decomposition into greenhouse gases. Here, we investigated the microbial response to abrupt in situ permafrost thaw. We sequenced the total RNA of a 1 m deep soil core consisting of up to 26 500-year-old permafrost material from an active abrupt erosion site. We analysed the microbial community in the active layer soil, the recently thawed, and the intact permafrost, and found maximum RNA:DNA ratios in recently thawed permafrost indicating a high microbial activity. In thawed permafrost, potentially copiotrophic Burkholderiales and Sphingobacteriales, but also microbiome predators dominated the community. Overall, both thaw-dependent and long-term soil properties significantly correlated with changes in community composition, as did microbiome predator abundance. Bacterial predators were dominated in shallower depths by Myxococcota, while protozoa, especially Cercozoa and Ciliophora, almost tripled in relative abundance in thawed layers. Our findings highlight the ecological importance of a diverse interkingdom and active microbial community highly abundant in abruptly thawing permafrost, as well as predation as potential biological control mechanism. |
format |
Article in Journal/Newspaper |
author |
Scheel, Maria Zervas, Athanasios Rijkers, Ruud Tveit, Alexander Tøsdal Ekelund, Flemming Campuzano Jiménez, Francisco Christensen, Torben R. Jacobsen, Carsten S. |
spellingShingle |
Scheel, Maria Zervas, Athanasios Rijkers, Ruud Tveit, Alexander Tøsdal Ekelund, Flemming Campuzano Jiménez, Francisco Christensen, Torben R. Jacobsen, Carsten S. Abrupt permafrost thaw triggers activity of copiotrophs and microbiome predators |
author_facet |
Scheel, Maria Zervas, Athanasios Rijkers, Ruud Tveit, Alexander Tøsdal Ekelund, Flemming Campuzano Jiménez, Francisco Christensen, Torben R. Jacobsen, Carsten S. |
author_sort |
Scheel, Maria |
title |
Abrupt permafrost thaw triggers activity of copiotrophs and microbiome predators |
title_short |
Abrupt permafrost thaw triggers activity of copiotrophs and microbiome predators |
title_full |
Abrupt permafrost thaw triggers activity of copiotrophs and microbiome predators |
title_fullStr |
Abrupt permafrost thaw triggers activity of copiotrophs and microbiome predators |
title_full_unstemmed |
Abrupt permafrost thaw triggers activity of copiotrophs and microbiome predators |
title_sort |
abrupt permafrost thaw triggers activity of copiotrophs and microbiome predators |
publisher |
Oxford University Press |
publishDate |
2023 |
url |
https://hdl.handle.net/10037/31913 https://doi.org/10.1093/femsec/fiad123 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
FEMS Microbiology Ecology Scheel, Zervas, Rijkers, Tveit, Ekelund, Campuzano Jiménez, Christensen, Jacobsen. Abrupt permafrost thaw triggers activity of copiotrophs and microbiome predators. FEMS Microbiology Ecology. 2023;99(11) FRIDAID 2196310 doi:10.1093/femsec/fiad123 0168-6496 1574-6941 https://hdl.handle.net/10037/31913 |
op_rights |
Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by-nc/4.0 |
op_doi |
https://doi.org/10.1093/femsec/fiad123 |
container_title |
FEMS Microbiology Ecology |
container_volume |
99 |
container_issue |
11 |
_version_ |
1786832740767760384 |