Increasing dominance of terrigenous organic matter in circumpolar freshwaters due to permafrost thaw.
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 subse...
Published in: | Limnology and Oceanography Letters |
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Online Access: | https://espace.inrs.ca/id/eprint/7832/ https://espace.inrs.ca/id/eprint/7832/1/P3426.pdf https://doi.org/10.1002/lol2.10063 |
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ftinrsquebec:oai:espace.inrs.ca:7832 2023-05-15T16:36:42+02:00 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 Peura, Sari Vincent, Warwick 2018 application/pdf https://espace.inrs.ca/id/eprint/7832/ https://espace.inrs.ca/id/eprint/7832/1/P3426.pdf https://doi.org/10.1002/lol2.10063 en eng https://espace.inrs.ca/id/eprint/7832/1/P3426.pdf Wauthy, Maxime, Rautio, Milla, Christoffersen, Kirsten S., Forsström, Laura, Laurion, Isabelle orcid:0000-0001-8694-3330 , Mariash, Heather, Peura, Sari et Vincent, Warwick (2018). Increasing dominance of terrigenous organic matter in circumpolar freshwaters due to permafrost thaw. Limnology and Oceanography Letters , vol. 3 , nº 3. p. 186-198. DOI:10.1002/lol2.10063 <https://doi.org/10.1002/lol2.10063>. doi:10.1002/lol2.10063 tundra organic carbon climate changes permafrost thawing greenhouse gases Article Évalué par les pairs 2018 ftinrsquebec https://doi.org/10.1002/lol2.10063 2023-02-10T11:44:45Z 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 Institut national de la recherche scientifique, Québec: Espace INRS Limnology and Oceanography Letters 3 3 186 198 |
institution |
Open Polar |
collection |
Institut national de la recherche scientifique, Québec: Espace INRS |
op_collection_id |
ftinrsquebec |
language |
English |
topic |
tundra organic carbon climate changes permafrost thawing greenhouse gases |
spellingShingle |
tundra organic carbon climate changes permafrost thawing greenhouse gases Wauthy, Maxime Rautio, Milla Christoffersen, Kirsten S. Forsström, Laura Laurion, Isabelle Mariash, Heather Peura, Sari Vincent, Warwick Increasing dominance of terrigenous organic matter in circumpolar freshwaters due to permafrost thaw. |
topic_facet |
tundra organic carbon climate changes permafrost thawing greenhouse gases |
description |
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 |
Wauthy, Maxime Rautio, Milla Christoffersen, Kirsten S. Forsström, Laura Laurion, Isabelle Mariash, Heather Peura, Sari Vincent, Warwick |
author_facet |
Wauthy, Maxime Rautio, Milla Christoffersen, Kirsten S. Forsström, Laura Laurion, Isabelle Mariash, Heather Peura, Sari Vincent, Warwick |
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. |
publishDate |
2018 |
url |
https://espace.inrs.ca/id/eprint/7832/ https://espace.inrs.ca/id/eprint/7832/1/P3426.pdf https://doi.org/10.1002/lol2.10063 |
genre |
Ice permafrost Subarctic Thermokarst Tundra |
genre_facet |
Ice permafrost Subarctic Thermokarst Tundra |
op_relation |
https://espace.inrs.ca/id/eprint/7832/1/P3426.pdf Wauthy, Maxime, Rautio, Milla, Christoffersen, Kirsten S., Forsström, Laura, Laurion, Isabelle orcid:0000-0001-8694-3330 , Mariash, Heather, Peura, Sari et Vincent, Warwick (2018). Increasing dominance of terrigenous organic matter in circumpolar freshwaters due to permafrost thaw. Limnology and Oceanography Letters , vol. 3 , nº 3. p. 186-198. DOI:10.1002/lol2.10063 <https://doi.org/10.1002/lol2.10063>. doi:10.1002/lol2.10063 |
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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1766027038654726144 |