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 14 C and 13 C characteristi...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/328023 2023-07-23T04:17:05+02:00 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 E. Holmes, Robert M. Spencer, Robert G M Organic geochemistry NWO-VENI: Ancient organic matter that matters: The fate of Siberian Yedoma deposits 2015-07-24 image/pdf https://dspace.library.uu.nl/handle/1874/328023 en eng 2041-1723 https://dspace.library.uu.nl/handle/1874/328023 info:eu-repo/semantics/OpenAccess Biochemistry Genetics and Molecular Biology(all) Chemistry(all) Physics and Astronomy(all) Article 2015 ftunivutrecht 2023-07-02T01:37:43Z 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 14 C and 13 C 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 14 C years) in permafrost thaw waters and millennial-aged carbon (up to 10,000 14 C years) across headwater streams. Microbial demand was supported by progressively younger (14 C-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. Article in Journal/Newspaper Arctic Arctic Ocean Climate change kolyma river permafrost Siberia Utrecht University Repository Arctic Arctic Ocean Kolyma ENVELOPE(161.000,161.000,69.500,69.500) |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
Biochemistry Genetics and Molecular Biology(all) Chemistry(all) Physics and Astronomy(all) |
spellingShingle |
Biochemistry Genetics and Molecular Biology(all) Chemistry(all) Physics and Astronomy(all) Mann, Paul J. Eglinton, Timothy I. McIntyre, Cameron P. Zimov, Nikita Davydova, Anna Vonk, Jorien E. Holmes, Robert M. Spencer, Robert G M Utilization of ancient permafrost carbon in headwaters of Arctic fluvial networks |
topic_facet |
Biochemistry Genetics and Molecular Biology(all) Chemistry(all) Physics and Astronomy(all) |
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 14 C and 13 C 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 14 C years) in permafrost thaw waters and millennial-aged carbon (up to 10,000 14 C years) across headwater streams. Microbial demand was supported by progressively younger (14 C-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. |
author2 |
Organic geochemistry NWO-VENI: Ancient organic matter that matters: The fate of Siberian Yedoma deposits |
format |
Article in Journal/Newspaper |
author |
Mann, Paul J. Eglinton, Timothy I. McIntyre, Cameron P. Zimov, Nikita Davydova, Anna Vonk, Jorien E. Holmes, Robert M. Spencer, Robert G M |
author_facet |
Mann, Paul J. Eglinton, Timothy I. McIntyre, Cameron P. Zimov, Nikita Davydova, Anna Vonk, Jorien E. 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 |
publishDate |
2015 |
url |
https://dspace.library.uu.nl/handle/1874/328023 |
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_relation |
2041-1723 https://dspace.library.uu.nl/handle/1874/328023 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1772178311218200576 |