Long-term in situ permafrost thaw effects on bacterial communities and potential aerobic respiration
Abstract: 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 i...
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Online Access: | https://hdl.handle.net/10067/1530750151162165141 https://repository.uantwerpen.be/docman/irua/b8da26/153075.pdf |
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ftunivantwerpen:c:irua:153075 2023-07-16T04:00:26+02:00 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 2018 pdf https://hdl.handle.net/10067/1530750151162165141 https://repository.uantwerpen.be/docman/irua/b8da26/153075.pdf eng eng info:eu-repo/semantics/altIdentifier/doi/10.1038/S41396-018-0176-Z info:eu-repo/semantics/altIdentifier/isi/000441581700003 info:eu-repo/semantics/openAccess 1751-7362 The ISME journal : multidisciplinary journal of microbial ecology Chemistry Biology info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftunivantwerpen https://doi.org/10.1038/S41396-018-0176-Z 2023-06-26T22:26:19Z Abstract: 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 IRUA - Institutional Repository van de Universiteit Antwerpen The ISME Journal 12 9 2129 2141 |
institution |
Open Polar |
collection |
IRUA - Institutional Repository van de Universiteit Antwerpen |
op_collection_id |
ftunivantwerpen |
language |
English |
topic |
Chemistry Biology |
spellingShingle |
Chemistry Biology 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 |
Chemistry Biology |
description |
Abstract: 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. |
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 |
publishDate |
2018 |
url |
https://hdl.handle.net/10067/1530750151162165141 https://repository.uantwerpen.be/docman/irua/b8da26/153075.pdf |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
1751-7362 The ISME journal : multidisciplinary journal of microbial ecology |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/S41396-018-0176-Z info:eu-repo/semantics/altIdentifier/isi/000441581700003 |
op_rights |
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 |
_version_ |
1771549183823577088 |