Increasing dominance of terrigenous organic matter in circumpolar freshwaters due to permafrost thaw
Abstract Climate change and permafrost thaw are unlocking the vast storage of organic carbon held in northern frozen soils. Here, we evaluated the effects of thawing ice‐rich permafrost on dissolved organic matter (DOM) in freshwaters by optical analysis of 253 ponds across the circumpolar North. Fo...
Published in: | Limnology and Oceanography Letters |
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Online Access: | http://dx.doi.org/10.1002/lol2.10063 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flol2.10063 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10063 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lol2.10063 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10063 |
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crwiley:10.1002/lol2.10063 2024-10-13T14:07:57+00:00 Increasing dominance of terrigenous organic matter in circumpolar freshwaters due to permafrost thaw Wauthy, Maxime Rautio, Milla Christoffersen, Kirsten S. Forsström, Laura Laurion, Isabelle Mariash, Heather L. Peura, Sari Vincent, Warwick F. Canada Excellence Research Chairs, Government of Canada ArcticNet Natural Sciences and Engineering Research Council of Canada Suomen Akatemia 2018 http://dx.doi.org/10.1002/lol2.10063 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flol2.10063 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10063 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lol2.10063 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10063 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Limnology and Oceanography Letters volume 3, issue 3, page 186-198 ISSN 2378-2242 2378-2242 journal-article 2018 crwiley https://doi.org/10.1002/lol2.10063 2024-09-23T04:35:22Z Abstract Climate change and permafrost thaw are unlocking the vast storage of organic carbon held in northern frozen soils. Here, we evaluated the effects of thawing ice‐rich permafrost on dissolved organic matter (DOM) in freshwaters by optical analysis of 253 ponds across the circumpolar North. For a subset of waters in subarctic Quebec, we also quantified the contribution of terrestrial sources to the DOM pool by stable isotopes. The optical measurements showed a higher proportion of terrestrial carbon and a lower algal contribution to DOM in waters affected by thawing permafrost. DOM composition was largely dominated (mean of 93%) by terrestrial substances at sites influenced by thawing permafrost, while the terrestrial influence was much less in waterbodies located on bedrock (36%) or with tundra soils unaffected by thermokarst processes (42%) in the catchment. Our results demonstrate a strong terrestrial imprint on freshwater ecosystems in degrading ice‐rich permafrost catchments, and the likely shift toward increasing dominance of land‐derived organic carbon in waters with ongoing permafrost thaw. Article in Journal/Newspaper Ice permafrost Subarctic Thermokarst Tundra Wiley Online Library Limnology and Oceanography Letters 3 3 186 198 |
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Wiley Online Library |
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English |
description |
Abstract Climate change and permafrost thaw are unlocking the vast storage of organic carbon held in northern frozen soils. Here, we evaluated the effects of thawing ice‐rich permafrost on dissolved organic matter (DOM) in freshwaters by optical analysis of 253 ponds across the circumpolar North. For a subset of waters in subarctic Quebec, we also quantified the contribution of terrestrial sources to the DOM pool by stable isotopes. The optical measurements showed a higher proportion of terrestrial carbon and a lower algal contribution to DOM in waters affected by thawing permafrost. DOM composition was largely dominated (mean of 93%) by terrestrial substances at sites influenced by thawing permafrost, while the terrestrial influence was much less in waterbodies located on bedrock (36%) or with tundra soils unaffected by thermokarst processes (42%) in the catchment. Our results demonstrate a strong terrestrial imprint on freshwater ecosystems in degrading ice‐rich permafrost catchments, and the likely shift toward increasing dominance of land‐derived organic carbon in waters with ongoing permafrost thaw. |
author2 |
Canada Excellence Research Chairs, Government of Canada ArcticNet Natural Sciences and Engineering Research Council of Canada Suomen Akatemia |
format |
Article in Journal/Newspaper |
author |
Wauthy, Maxime Rautio, Milla Christoffersen, Kirsten S. Forsström, Laura Laurion, Isabelle Mariash, Heather L. Peura, Sari Vincent, Warwick F. |
spellingShingle |
Wauthy, Maxime Rautio, Milla Christoffersen, Kirsten S. Forsström, Laura Laurion, Isabelle Mariash, Heather L. Peura, Sari Vincent, Warwick F. Increasing dominance of terrigenous organic matter in circumpolar freshwaters due to permafrost thaw |
author_facet |
Wauthy, Maxime Rautio, Milla Christoffersen, Kirsten S. Forsström, Laura Laurion, Isabelle Mariash, Heather L. Peura, Sari Vincent, Warwick F. |
author_sort |
Wauthy, Maxime |
title |
Increasing dominance of terrigenous organic matter in circumpolar freshwaters due to permafrost thaw |
title_short |
Increasing dominance of terrigenous organic matter in circumpolar freshwaters due to permafrost thaw |
title_full |
Increasing dominance of terrigenous organic matter in circumpolar freshwaters due to permafrost thaw |
title_fullStr |
Increasing dominance of terrigenous organic matter in circumpolar freshwaters due to permafrost thaw |
title_full_unstemmed |
Increasing dominance of terrigenous organic matter in circumpolar freshwaters due to permafrost thaw |
title_sort |
increasing dominance of terrigenous organic matter in circumpolar freshwaters due to permafrost thaw |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1002/lol2.10063 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flol2.10063 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10063 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lol2.10063 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10063 |
genre |
Ice permafrost Subarctic Thermokarst Tundra |
genre_facet |
Ice permafrost Subarctic Thermokarst Tundra |
op_source |
Limnology and Oceanography Letters volume 3, issue 3, page 186-198 ISSN 2378-2242 2378-2242 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/lol2.10063 |
container_title |
Limnology and Oceanography Letters |
container_volume |
3 |
container_issue |
3 |
container_start_page |
186 |
op_container_end_page |
198 |
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1812814525231005696 |