Ontogenic succession of thermokarst thaw ponds is linked to dissolved organic matter quality and microbial degradation potential
Warming climate is thawing the permafrost in arctic and subarctic regions, leading to formation of thermokarst ponds. During the formation and geomorphological succession of these ponds, carbon that has been trapped in frozen soils for thousands of years is hydrologically mobilized and returned to t...
Published in: | Limnology and Oceanography |
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ftoslouniv:oai:www.duo.uio.no:10852/83915 2023-05-15T15:10:10+02:00 Ontogenic succession of thermokarst thaw ponds is linked to dissolved organic matter quality and microbial degradation potential Peura, Sari Wauthy, Maxime Simone, Domenico Eiler, Alexander Einarsdottir, Karolina Rautio, Milla Bertilsson, Stefan 2020-09-03T20:49:15Z http://hdl.handle.net/10852/83915 http://urn.nb.no/URN:NBN:no-86632 https://doi.org/10.1002/lno.11349 EN eng http://urn.nb.no/URN:NBN:no-86632 Peura, Sari Wauthy, Maxime Simone, Domenico Eiler, Alexander Einarsdottir, Karolina Rautio, Milla Bertilsson, Stefan . Ontogenic succession of thermokarst thaw ponds is linked to dissolved organic matter quality and microbial degradation potential. Limnology and Oceanography. 2020, 65(1), S248-S263 http://hdl.handle.net/10852/83915 1827228 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Limnology and Oceanography&rft.volume=65&rft.spage=S248&rft.date=2020 Limnology and Oceanography 65 S1 S248 S263 https://doi.org/10.1002/lno.11349 URN:NBN:no-86632 Fulltext https://www.duo.uio.no/bitstream/handle/10852/83915/1/Ontogenic%2Bsuccession%2Bof%2Bthermokarst-lno.11349.pdf Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 0024-3590 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2020 ftoslouniv https://doi.org/10.1002/lno.11349 2021-03-17T23:30:58Z Warming climate is thawing the permafrost in arctic and subarctic regions, leading to formation of thermokarst ponds. During the formation and geomorphological succession of these ponds, carbon that has been trapped in frozen soils for thousands of years is hydrologically mobilized and returned to the active carbon cycle. We sampled 12 thermokarst ponds representing three different stages of pond succession to study the potential of microbial communities to metabolize the organic carbon in the water. We investigated the quality of the dissolved organic carbon (DOC) in the water column based on the spectrophotometric and fluorometric properties of the chromophoric dissolved organic matter combined with parallel factor analysis and the potential of the microbial community for degrading these carbon compounds based on genetic markers related to carbon degradation. Our analysis showed a clear difference in the DOC quality across the different developmental stages. In the younger ponds, organic matter quality suggested that it was originating from the degrading permafrost and in the metagenomes collected from these ponds, the normalized abundance of genes related to degradation of carbon compounds was higher. There was also a shift in the degradation potential in the water column of the ponds, with higher potential for organic matter degradation in deeper, anoxic layers. In conclusion, our results show that the DOC quality and the genetic potential of the microbial community for carbon cycling change across the pond ontogeny, suggesting a capacity of the microbial communities to adapt to changing environmental conditions. Article in Journal/Newspaper Arctic permafrost Subarctic Thermokarst Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Arctic Limnology and Oceanography 65 S1 |
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Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
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ftoslouniv |
language |
English |
description |
Warming climate is thawing the permafrost in arctic and subarctic regions, leading to formation of thermokarst ponds. During the formation and geomorphological succession of these ponds, carbon that has been trapped in frozen soils for thousands of years is hydrologically mobilized and returned to the active carbon cycle. We sampled 12 thermokarst ponds representing three different stages of pond succession to study the potential of microbial communities to metabolize the organic carbon in the water. We investigated the quality of the dissolved organic carbon (DOC) in the water column based on the spectrophotometric and fluorometric properties of the chromophoric dissolved organic matter combined with parallel factor analysis and the potential of the microbial community for degrading these carbon compounds based on genetic markers related to carbon degradation. Our analysis showed a clear difference in the DOC quality across the different developmental stages. In the younger ponds, organic matter quality suggested that it was originating from the degrading permafrost and in the metagenomes collected from these ponds, the normalized abundance of genes related to degradation of carbon compounds was higher. There was also a shift in the degradation potential in the water column of the ponds, with higher potential for organic matter degradation in deeper, anoxic layers. In conclusion, our results show that the DOC quality and the genetic potential of the microbial community for carbon cycling change across the pond ontogeny, suggesting a capacity of the microbial communities to adapt to changing environmental conditions. |
format |
Article in Journal/Newspaper |
author |
Peura, Sari Wauthy, Maxime Simone, Domenico Eiler, Alexander Einarsdottir, Karolina Rautio, Milla Bertilsson, Stefan |
spellingShingle |
Peura, Sari Wauthy, Maxime Simone, Domenico Eiler, Alexander Einarsdottir, Karolina Rautio, Milla Bertilsson, Stefan Ontogenic succession of thermokarst thaw ponds is linked to dissolved organic matter quality and microbial degradation potential |
author_facet |
Peura, Sari Wauthy, Maxime Simone, Domenico Eiler, Alexander Einarsdottir, Karolina Rautio, Milla Bertilsson, Stefan |
author_sort |
Peura, Sari |
title |
Ontogenic succession of thermokarst thaw ponds is linked to dissolved organic matter quality and microbial degradation potential |
title_short |
Ontogenic succession of thermokarst thaw ponds is linked to dissolved organic matter quality and microbial degradation potential |
title_full |
Ontogenic succession of thermokarst thaw ponds is linked to dissolved organic matter quality and microbial degradation potential |
title_fullStr |
Ontogenic succession of thermokarst thaw ponds is linked to dissolved organic matter quality and microbial degradation potential |
title_full_unstemmed |
Ontogenic succession of thermokarst thaw ponds is linked to dissolved organic matter quality and microbial degradation potential |
title_sort |
ontogenic succession of thermokarst thaw ponds is linked to dissolved organic matter quality and microbial degradation potential |
publishDate |
2020 |
url |
http://hdl.handle.net/10852/83915 http://urn.nb.no/URN:NBN:no-86632 https://doi.org/10.1002/lno.11349 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost Subarctic Thermokarst |
genre_facet |
Arctic permafrost Subarctic Thermokarst |
op_source |
0024-3590 |
op_relation |
http://urn.nb.no/URN:NBN:no-86632 Peura, Sari Wauthy, Maxime Simone, Domenico Eiler, Alexander Einarsdottir, Karolina Rautio, Milla Bertilsson, Stefan . Ontogenic succession of thermokarst thaw ponds is linked to dissolved organic matter quality and microbial degradation potential. Limnology and Oceanography. 2020, 65(1), S248-S263 http://hdl.handle.net/10852/83915 1827228 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Limnology and Oceanography&rft.volume=65&rft.spage=S248&rft.date=2020 Limnology and Oceanography 65 S1 S248 S263 https://doi.org/10.1002/lno.11349 URN:NBN:no-86632 Fulltext https://www.duo.uio.no/bitstream/handle/10852/83915/1/Ontogenic%2Bsuccession%2Bof%2Bthermokarst-lno.11349.pdf |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/lno.11349 |
container_title |
Limnology and Oceanography |
container_volume |
65 |
container_issue |
S1 |
_version_ |
1766341223609532416 |