Long-term in situ permafrost thaw effects on bacterial communities and potential aerobic respiration
International audience The decomposition of large stocks of soil organic carbon in thawing permafrost might depend on more than climate change-induced temperature increases: indirect effects of thawing via altered bacterial community structure (BCS) or rooting patterns are largely unexplored. We use...
Published in: | The ISME Journal |
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Main Authors: | , , , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2018
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Online Access: | https://hal.science/hal-02377983 https://hal.science/hal-02377983/document https://hal.science/hal-02377983/file/Monteux2018_ISME_J.pdf https://doi.org/10.1038/s41396-018-0176-z |
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Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[SDE.MCG]Environmental Sciences/Global Changes Monteux, Sylvain Weedon, James Blume-Werry, Gesche Gavazov, Konstantin Jassey, Vincent, E. J. Johansson, Margareta Keuper, Frida Olid, Carolina Dorrepaal, Ellen Long-term in situ permafrost thaw effects on bacterial communities and potential aerobic respiration |
topic_facet |
[SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience The decomposition of large stocks of soil organic carbon in thawing permafrost might depend on more than climate change-induced temperature increases: indirect effects of thawing via altered bacterial community structure (BCS) or rooting patterns are largely unexplored. We used a 10-year in situ permafrost thaw experiment and aerobic incubations to investigate alterations in BCS and potential respiration at different depths, and the extent to which they are related with each other and with root density. Active layer and permafrost BCS strongly differed, and the BCS in formerly frozen soils (below the natural thawfront) converged under induced deep thaw to strongly resemble the active layer BCS, possibly as a result of colonization by overlying microorganisms. Overall, respiration rates decreased with depth and soils showed lower potential respiration when subjected to deeper thaw, which we attributed to gradual labile carbon pool depletion. Despite deeper rooting under induced deep thaw, root density measurements did not improve soil chemistry-based models of potential respiration. However, BCS explained an additional unique portion of variation in respiration, particularly when accounting for differences in organic matter content. Our results suggest that by measuring bacterial community composition, we can improve both our understanding and the modeling of the permafrost carbon feedback. |
author2 |
Department of Ecological Science Amsterdam Vrije Universiteit Brussel (VUB) Ecole Polytechnique Fédérale de Lausanne (EPFL) Laboratoire Ecologie Fonctionnelle et Environnement (LEFE) Institut Ecologie et Environnement - CNRS Ecologie et Environnement (INEE-CNRS) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) Université de Toulouse (UT) Department of Systems Ecology University of Amsterdam Amsterdam = Universiteit van Amsterdam (UvA) Climate Impacts Research Centre (CIRC) Umeå University |
format |
Article in Journal/Newspaper |
author |
Monteux, Sylvain Weedon, James Blume-Werry, Gesche Gavazov, Konstantin Jassey, Vincent, E. J. Johansson, Margareta Keuper, Frida Olid, Carolina Dorrepaal, Ellen |
author_facet |
Monteux, Sylvain Weedon, James Blume-Werry, Gesche Gavazov, Konstantin Jassey, Vincent, E. J. Johansson, Margareta Keuper, Frida Olid, Carolina Dorrepaal, Ellen |
author_sort |
Monteux, Sylvain |
title |
Long-term in situ permafrost thaw effects on bacterial communities and potential aerobic respiration |
title_short |
Long-term in situ permafrost thaw effects on bacterial communities and potential aerobic respiration |
title_full |
Long-term in situ permafrost thaw effects on bacterial communities and potential aerobic respiration |
title_fullStr |
Long-term in situ permafrost thaw effects on bacterial communities and potential aerobic respiration |
title_full_unstemmed |
Long-term in situ permafrost thaw effects on bacterial communities and potential aerobic respiration |
title_sort |
long-term in situ permafrost thaw effects on bacterial communities and potential aerobic respiration |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-02377983 https://hal.science/hal-02377983/document https://hal.science/hal-02377983/file/Monteux2018_ISME_J.pdf https://doi.org/10.1038/s41396-018-0176-z |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
ISSN: 1751-7362 EISSN: 1751-7370 ISME Journal https://hal.science/hal-02377983 ISME Journal, 2018, 12 (9), pp.2129-2141. ⟨10.1038/s41396-018-0176-z⟩ https://www.nature.com/ismej/ |
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info:eu-repo/semantics/altIdentifier/doi/10.1038/s41396-018-0176-z info:eu-repo/semantics/altIdentifier/pmid/29875436 hal-02377983 https://hal.science/hal-02377983 https://hal.science/hal-02377983/document https://hal.science/hal-02377983/file/Monteux2018_ISME_J.pdf doi:10.1038/s41396-018-0176-z PRODINRA: 437708 PUBMED: 29875436 WOS: 000441581700003 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/s41396-018-0176-z |
container_title |
The ISME Journal |
container_volume |
12 |
container_issue |
9 |
container_start_page |
2129 |
op_container_end_page |
2141 |
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1790606556776103936 |
spelling |
ftinsu:oai:HAL:hal-02377983v1 2024-02-11T10:07:48+01:00 Long-term in situ permafrost thaw effects on bacterial communities and potential aerobic respiration Monteux, Sylvain Weedon, James Blume-Werry, Gesche Gavazov, Konstantin Jassey, Vincent, E. J. Johansson, Margareta Keuper, Frida Olid, Carolina Dorrepaal, Ellen Department of Ecological Science Amsterdam Vrije Universiteit Brussel (VUB) Ecole Polytechnique Fédérale de Lausanne (EPFL) Laboratoire Ecologie Fonctionnelle et Environnement (LEFE) Institut Ecologie et Environnement - CNRS Ecologie et Environnement (INEE-CNRS) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) Université de Toulouse (UT) Department of Systems Ecology University of Amsterdam Amsterdam = Universiteit van Amsterdam (UvA) Climate Impacts Research Centre (CIRC) Umeå University 2018-09 https://hal.science/hal-02377983 https://hal.science/hal-02377983/document https://hal.science/hal-02377983/file/Monteux2018_ISME_J.pdf https://doi.org/10.1038/s41396-018-0176-z en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/s41396-018-0176-z info:eu-repo/semantics/altIdentifier/pmid/29875436 hal-02377983 https://hal.science/hal-02377983 https://hal.science/hal-02377983/document https://hal.science/hal-02377983/file/Monteux2018_ISME_J.pdf doi:10.1038/s41396-018-0176-z PRODINRA: 437708 PUBMED: 29875436 WOS: 000441581700003 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1751-7362 EISSN: 1751-7370 ISME Journal https://hal.science/hal-02377983 ISME Journal, 2018, 12 (9), pp.2129-2141. ⟨10.1038/s41396-018-0176-z⟩ https://www.nature.com/ismej/ [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2018 ftinsu https://doi.org/10.1038/s41396-018-0176-z 2024-01-17T17:28:31Z International audience The decomposition of large stocks of soil organic carbon in thawing permafrost might depend on more than climate change-induced temperature increases: indirect effects of thawing via altered bacterial community structure (BCS) or rooting patterns are largely unexplored. We used a 10-year in situ permafrost thaw experiment and aerobic incubations to investigate alterations in BCS and potential respiration at different depths, and the extent to which they are related with each other and with root density. Active layer and permafrost BCS strongly differed, and the BCS in formerly frozen soils (below the natural thawfront) converged under induced deep thaw to strongly resemble the active layer BCS, possibly as a result of colonization by overlying microorganisms. Overall, respiration rates decreased with depth and soils showed lower potential respiration when subjected to deeper thaw, which we attributed to gradual labile carbon pool depletion. Despite deeper rooting under induced deep thaw, root density measurements did not improve soil chemistry-based models of potential respiration. However, BCS explained an additional unique portion of variation in respiration, particularly when accounting for differences in organic matter content. Our results suggest that by measuring bacterial community composition, we can improve both our understanding and the modeling of the permafrost carbon feedback. Article in Journal/Newspaper permafrost Institut national des sciences de l'Univers: HAL-INSU The ISME Journal 12 9 2129 2141 |