Utilization of ancient permafrost carbon in headwaters of Arctic fluvial networks
Northern high-latitude rivers are major conduits of carbon from land to coastal seas and the Arctic Ocean. Arctic warming is promoting terrestrial permafrost thaw and shifting hydrologic flowpaths, leading to fluvial mobilization of ancient carbon stores. Here we describe 14C and 13C characteristics...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/102960 2023-12-03T10:16:01+01:00 Utilization of ancient permafrost carbon in headwaters of Arctic fluvial networks Mann, Paul J. Eglinton, Timothy I. McIntyre, Cameron P. Zimov, Nikita Davydova, Anna Vonk, Jorien Holmes, Robert M. Spencer, Robert G. M. 2015 application/application/pdf https://hdl.handle.net/20.500.11850/102960 https://doi.org/10.3929/ethz-b-000102960 en eng Nature info:eu-repo/semantics/altIdentifier/doi/10.1038/ncomms8856 info:eu-repo/semantics/altIdentifier/wos/000358861600002 http://hdl.handle.net/20.500.11850/102960 doi:10.3929/ethz-b-000102960 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International Nature Communications, 6 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2015 ftethz https://doi.org/20.500.11850/10296010.3929/ethz-b-00010296010.1038/ncomms8856 2023-11-06T00:50:14Z Northern high-latitude rivers are major conduits of carbon from land to coastal seas and the Arctic Ocean. Arctic warming is promoting terrestrial permafrost thaw and shifting hydrologic flowpaths, leading to fluvial mobilization of ancient carbon stores. Here we describe 14C and 13C characteristics of dissolved organic carbon from fluvial networks across the Kolyma River Basin (Siberia), and isotopic changes during bioincubation experiments. Microbial communities utilized ancient carbon (11,300 to >50,000 14C years) in permafrost thaw waters and millennial-aged carbon (up to 10,000 14C years) across headwater streams. Microbial demand was supported by progressively younger (14C-enriched) carbon downstream through the network, with predominantly modern carbon pools subsidizing microorganisms in large rivers and main-stem waters. Permafrost acts as a significant and preferentially degradable source of bioavailable carbon in Arctic freshwaters, which is likely to increase as permafrost thaw intensifies causing positive climate feedbacks in response to on-going climate change. ISSN:2041-1723 Article in Journal/Newspaper Arctic Arctic Ocean Climate change kolyma river permafrost Siberia ETH Zürich Research Collection Arctic Arctic Ocean Kolyma ENVELOPE(161.000,161.000,69.500,69.500) |
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Open Polar |
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ETH Zürich Research Collection |
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ftethz |
language |
English |
description |
Northern high-latitude rivers are major conduits of carbon from land to coastal seas and the Arctic Ocean. Arctic warming is promoting terrestrial permafrost thaw and shifting hydrologic flowpaths, leading to fluvial mobilization of ancient carbon stores. Here we describe 14C and 13C characteristics of dissolved organic carbon from fluvial networks across the Kolyma River Basin (Siberia), and isotopic changes during bioincubation experiments. Microbial communities utilized ancient carbon (11,300 to >50,000 14C years) in permafrost thaw waters and millennial-aged carbon (up to 10,000 14C years) across headwater streams. Microbial demand was supported by progressively younger (14C-enriched) carbon downstream through the network, with predominantly modern carbon pools subsidizing microorganisms in large rivers and main-stem waters. Permafrost acts as a significant and preferentially degradable source of bioavailable carbon in Arctic freshwaters, which is likely to increase as permafrost thaw intensifies causing positive climate feedbacks in response to on-going climate change. ISSN:2041-1723 |
format |
Article in Journal/Newspaper |
author |
Mann, Paul J. Eglinton, Timothy I. McIntyre, Cameron P. Zimov, Nikita Davydova, Anna Vonk, Jorien Holmes, Robert M. Spencer, Robert G. M. |
spellingShingle |
Mann, Paul J. Eglinton, Timothy I. McIntyre, Cameron P. Zimov, Nikita Davydova, Anna Vonk, Jorien Holmes, Robert M. Spencer, Robert G. M. Utilization of ancient permafrost carbon in headwaters of Arctic fluvial networks |
author_facet |
Mann, Paul J. Eglinton, Timothy I. McIntyre, Cameron P. Zimov, Nikita Davydova, Anna Vonk, Jorien Holmes, Robert M. Spencer, Robert G. M. |
author_sort |
Mann, Paul J. |
title |
Utilization of ancient permafrost carbon in headwaters of Arctic fluvial networks |
title_short |
Utilization of ancient permafrost carbon in headwaters of Arctic fluvial networks |
title_full |
Utilization of ancient permafrost carbon in headwaters of Arctic fluvial networks |
title_fullStr |
Utilization of ancient permafrost carbon in headwaters of Arctic fluvial networks |
title_full_unstemmed |
Utilization of ancient permafrost carbon in headwaters of Arctic fluvial networks |
title_sort |
utilization of ancient permafrost carbon in headwaters of arctic fluvial networks |
publisher |
Nature |
publishDate |
2015 |
url |
https://hdl.handle.net/20.500.11850/102960 https://doi.org/10.3929/ethz-b-000102960 |
long_lat |
ENVELOPE(161.000,161.000,69.500,69.500) |
geographic |
Arctic Arctic Ocean Kolyma |
geographic_facet |
Arctic Arctic Ocean Kolyma |
genre |
Arctic Arctic Ocean Climate change kolyma river permafrost Siberia |
genre_facet |
Arctic Arctic Ocean Climate change kolyma river permafrost Siberia |
op_source |
Nature Communications, 6 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/ncomms8856 info:eu-repo/semantics/altIdentifier/wos/000358861600002 http://hdl.handle.net/20.500.11850/102960 doi:10.3929/ethz-b-000102960 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International |
op_doi |
https://doi.org/20.500.11850/10296010.3929/ethz-b-00010296010.1038/ncomms8856 |
_version_ |
1784262902751952896 |