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: | https://doi.org/10.1002/lol2.10063 https://doaj.org/article/71afa9bf45ce4cfdb2cfc9b0801c7ba4 |
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ftdoajarticles:oai:doaj.org/article:71afa9bf45ce4cfdb2cfc9b0801c7ba4 2023-05-15T16:36:44+02:00 Increasing dominance of terrigenous organic matter in circumpolar freshwaters due to permafrost thaw Maxime Wauthy Milla Rautio Kirsten S. Christoffersen Laura Forsström Isabelle Laurion Heather L. Mariash Sari Peura Warwick F. Vincent 2018-06-01T00:00:00Z https://doi.org/10.1002/lol2.10063 https://doaj.org/article/71afa9bf45ce4cfdb2cfc9b0801c7ba4 EN eng Wiley https://doi.org/10.1002/lol2.10063 https://doaj.org/toc/2378-2242 2378-2242 doi:10.1002/lol2.10063 https://doaj.org/article/71afa9bf45ce4cfdb2cfc9b0801c7ba4 Limnology and Oceanography Letters, Vol 3, Iss 3, Pp 186-198 (2018) Oceanography GC1-1581 article 2018 ftdoajarticles https://doi.org/10.1002/lol2.10063 2023-01-08T01:30:01Z 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 Directory of Open Access Journals: DOAJ Articles Limnology and Oceanography Letters 3 3 186 198 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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English |
topic |
Oceanography GC1-1581 |
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Oceanography GC1-1581 Maxime Wauthy Milla Rautio Kirsten S. Christoffersen Laura Forsström Isabelle Laurion Heather L. Mariash Sari Peura Warwick F. Vincent Increasing dominance of terrigenous organic matter in circumpolar freshwaters due to permafrost thaw |
topic_facet |
Oceanography GC1-1581 |
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. |
format |
Article in Journal/Newspaper |
author |
Maxime Wauthy Milla Rautio Kirsten S. Christoffersen Laura Forsström Isabelle Laurion Heather L. Mariash Sari Peura Warwick F. Vincent |
author_facet |
Maxime Wauthy Milla Rautio Kirsten S. Christoffersen Laura Forsström Isabelle Laurion Heather L. Mariash Sari Peura Warwick F. Vincent |
author_sort |
Maxime Wauthy |
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 |
https://doi.org/10.1002/lol2.10063 https://doaj.org/article/71afa9bf45ce4cfdb2cfc9b0801c7ba4 |
genre |
Ice permafrost Subarctic Thermokarst Tundra |
genre_facet |
Ice permafrost Subarctic Thermokarst Tundra |
op_source |
Limnology and Oceanography Letters, Vol 3, Iss 3, Pp 186-198 (2018) |
op_relation |
https://doi.org/10.1002/lol2.10063 https://doaj.org/toc/2378-2242 2378-2242 doi:10.1002/lol2.10063 https://doaj.org/article/71afa9bf45ce4cfdb2cfc9b0801c7ba4 |
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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1766027070628954112 |