Abrupt permafrost thaw triggers activity of copiotrophs and microbiome predators
Abstract 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 si...
Published in: | FEMS Microbiology Ecology |
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Oxford University Press (OUP)
2023
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Online Access: | http://dx.doi.org/10.1093/femsec/fiad123 https://academic.oup.com/femsec/advance-article-pdf/doi/10.1093/femsec/fiad123/51894388/fiad123.pdf https://academic.oup.com/femsec/article-pdf/99/11/fiad123/52535043/fiad123.pdf |
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croxfordunivpr:10.1093/femsec/fiad123 2024-10-13T14:10:09+00:00 Abrupt permafrost thaw triggers activity of copiotrophs and microbiome predators Scheel, Maria Zervas, Athanasios Rijkers, Ruud Tveit, Alexander T Ekelund, Flemming Campuzano Jiménez, Francisco Christensen, Torben R Jacobsen, Carsten S Faculty of Science and Technology, Aarhus University 2023 http://dx.doi.org/10.1093/femsec/fiad123 https://academic.oup.com/femsec/advance-article-pdf/doi/10.1093/femsec/fiad123/51894388/fiad123.pdf https://academic.oup.com/femsec/article-pdf/99/11/fiad123/52535043/fiad123.pdf en eng Oxford University Press (OUP) https://creativecommons.org/licenses/by-nc/4.0/ FEMS Microbiology Ecology volume 99, issue 11 ISSN 1574-6941 journal-article 2023 croxfordunivpr https://doi.org/10.1093/femsec/fiad123 2024-09-17T04:32:15Z Abstract 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 Oxford University Press FEMS Microbiology Ecology 99 11 |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract 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. |
author2 |
Faculty of Science and Technology, Aarhus University |
format |
Article in Journal/Newspaper |
author |
Scheel, Maria Zervas, Athanasios Rijkers, Ruud Tveit, Alexander T Ekelund, Flemming Campuzano Jiménez, Francisco Christensen, Torben R Jacobsen, Carsten S |
spellingShingle |
Scheel, Maria Zervas, Athanasios Rijkers, Ruud Tveit, Alexander T 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 T 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 (OUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1093/femsec/fiad123 https://academic.oup.com/femsec/advance-article-pdf/doi/10.1093/femsec/fiad123/51894388/fiad123.pdf https://academic.oup.com/femsec/article-pdf/99/11/fiad123/52535043/fiad123.pdf |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
FEMS Microbiology Ecology volume 99, issue 11 ISSN 1574-6941 |
op_rights |
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_ |
1812817323175706624 |