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 |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Uppsala universitet, Limnologi
2020
|
Subjects: | |
Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-408480 https://doi.org/10.1002/lno.11349 |
id |
ftuppsalauniv:oai:DiVA.org:uu-408480 |
---|---|
record_format |
openpolar |
spelling |
ftuppsalauniv:oai:DiVA.org:uu-408480 2023-05-15T15:09:15+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 Einarsdóttir, Karólina Rautio, Milla Bertilsson, Stefan 2020 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-408480 https://doi.org/10.1002/lno.11349 eng eng Uppsala universitet, Limnologi Uppsala universitet, Science for Life Laboratory, SciLifeLab Swedish Univ Agr Sci, Dept Forest Mycol & Plant Pathol, Sci Life Lab, Uppsala, Sweden Univ Quebec Chicoutimi, Dept Sci Fondamentales, Chicoutimi, PQ, Canada;Univ Laval, CEN, Quebec City, PQ, Canada Swedish Univ Agr Sci, Dept Plant Biol, Uppsala, Sweden;Swedish Univ Agr Sci, SLU Bioinformat Infrastruct, Uppsala, Sweden Univ Oslo, Ctr Biogeochem Anthropocene, Dept Biosci, Sect Aquat Biol & Toxicol, Oslo, Norway Univ Quebec Chicoutimi, Dept Sci Fondamentales, Chicoutimi, PQ, Canada;Univ Laval, CEN, Quebec City, PQ, Canada;Univ Montreal, Grp Interuniv Res Limnol & Aquat Environm GRIL, Montreal, PQ, Canada Swedish Univ Agr Sci, Dept Aquat Sci & Assessment, Uppsala, Sweden WILEY Limnology and Oceanography, 0024-3590, 2020, 65:SI, s. S248-S263 orcid:0000-0003-3892-8157 orcid:0000-0003-2858-9809 orcid:0000-0001-9916-9567 orcid:0000-0001-9842-0158 orcid:0000-0002-4265-1835 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-408480 doi:10.1002/lno.11349 ISI:000492817100001 info:eu-repo/semantics/openAccess Microbiology Mikrobiologi Article in journal info:eu-repo/semantics/article text 2020 ftuppsalauniv https://doi.org/10.1002/lno.11349 2023-02-23T21:58:08Z 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 Uppsala University: Publications (DiVA) Arctic Limnology and Oceanography 65 S1 |
institution |
Open Polar |
collection |
Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
English |
topic |
Microbiology Mikrobiologi |
spellingShingle |
Microbiology Mikrobiologi Peura, Sari Wauthy, Maxime Simone, Domenico Eiler, Alexander Einarsdóttir, Karólina Rautio, Milla Bertilsson, Stefan Ontogenic succession of thermokarst thaw ponds is linked to dissolved organic matter quality and microbial degradation potential |
topic_facet |
Microbiology Mikrobiologi |
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 Einarsdóttir, Karólina Rautio, Milla Bertilsson, Stefan |
author_facet |
Peura, Sari Wauthy, Maxime Simone, Domenico Eiler, Alexander Einarsdóttir, Karólina 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 |
publisher |
Uppsala universitet, Limnologi |
publishDate |
2020 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-408480 https://doi.org/10.1002/lno.11349 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost Subarctic Thermokarst |
genre_facet |
Arctic permafrost Subarctic Thermokarst |
op_relation |
Limnology and Oceanography, 0024-3590, 2020, 65:SI, s. S248-S263 orcid:0000-0003-3892-8157 orcid:0000-0003-2858-9809 orcid:0000-0001-9916-9567 orcid:0000-0001-9842-0158 orcid:0000-0002-4265-1835 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-408480 doi:10.1002/lno.11349 ISI:000492817100001 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/lno.11349 |
container_title |
Limnology and Oceanography |
container_volume |
65 |
container_issue |
S1 |
_version_ |
1766340469075214336 |