Origin and temporal variability of unusually low δ13C-DOC values in two High Arctic catchments
The stable carbon isotopic composition of dissolved organic matter (δ13C-DOC) reveals information about its source and extent of biological processing. Here we report the lowest δ13C-DOC values (−43.8‰) measured to date in surface waters. The streams were located in the High Arctic, a region current...
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/9630 2023-07-02T03:30:53+02:00 Origin and temporal variability of unusually low δ13C-DOC values in two High Arctic catchments Hindshaw, Ruth Lang, S Bernasconi, S Heaton, T Lindsay, M Boyd, E European Commission University of St Andrews. Earth and Environmental Sciences University of St Andrews. St Andrews Isotope Geochemistry 2016-10-08 application/pdf http://hdl.handle.net/10023/9630 https://doi.org/10.1002/2015JG003303 http://onlinelibrary.wiley.com/doi/10.1002/2015JG003303/full#footer-support-info eng eng Journal of Geophysical Research - Biogeosciences Hindshaw , R , Lang , S , Bernasconi , S , Heaton , T , Lindsay , M & Boyd , E 2016 , ' Origin and temporal variability of unusually low δ 13 C-DOC values in two High Arctic catchments ' , Journal of Geophysical Research - Biogeosciences , vol. 121 , no. 4 , pp. 1073-1085 . https://doi.org/10.1002/2015JG003303 2169-8961 PURE: 241569915 PURE UUID: 0604ce37-5c69-44e0-98f1-41aadf527155 Scopus: 84962808604 WOS: 000378702800003 http://hdl.handle.net/10023/9630 https://doi.org/10.1002/2015JG003303 http://onlinelibrary.wiley.com/doi/10.1002/2015JG003303/full#footer-support-info PIEF-GA-2012-331501 © 2016. American Geophysical Union. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://dx.doi.org/10.1002/2015JG003303 GE Environmental Sciences NDAS SDG 13 - Climate Action GE Journal article 2016 ftstandrewserep https://doi.org/10.1002/2015JG003303 2023-06-13T18:28:30Z The stable carbon isotopic composition of dissolved organic matter (δ13C-DOC) reveals information about its source and extent of biological processing. Here we report the lowest δ13C-DOC values (−43.8‰) measured to date in surface waters. The streams were located in the High Arctic, a region currently experiencing rapid changes in climate and carbon cycling. Based on the widespread occurrence of methane cycling in permafrost regions and the detection of the pmoA gene, a proxy for aerobic methanotrophs we conclude that the low δ13C-DOC values are due to organic matter partially derived from methanotrophs consuming biologically produced, 13C-depleted methane. These findings demonstrate the significant impact that biological activity has on the stream water chemistry exported from permafrost and glaciated environments in the Arctic. Given that the catchments studied here are representative of larger areas of the Arctic, occurrences of low δ13C-DOC values may be more widespread than previously recognized, with implications for understanding C cycling in these environments. Publisher PDF Peer reviewed Article in Journal/Newspaper Arctic Arctic permafrost University of St Andrews: Digital Research Repository Arctic Journal of Geophysical Research: Biogeosciences 121 4 1073 1085 |
institution |
Open Polar |
collection |
University of St Andrews: Digital Research Repository |
op_collection_id |
ftstandrewserep |
language |
English |
topic |
GE Environmental Sciences NDAS SDG 13 - Climate Action GE |
spellingShingle |
GE Environmental Sciences NDAS SDG 13 - Climate Action GE Hindshaw, Ruth Lang, S Bernasconi, S Heaton, T Lindsay, M Boyd, E Origin and temporal variability of unusually low δ13C-DOC values in two High Arctic catchments |
topic_facet |
GE Environmental Sciences NDAS SDG 13 - Climate Action GE |
description |
The stable carbon isotopic composition of dissolved organic matter (δ13C-DOC) reveals information about its source and extent of biological processing. Here we report the lowest δ13C-DOC values (−43.8‰) measured to date in surface waters. The streams were located in the High Arctic, a region currently experiencing rapid changes in climate and carbon cycling. Based on the widespread occurrence of methane cycling in permafrost regions and the detection of the pmoA gene, a proxy for aerobic methanotrophs we conclude that the low δ13C-DOC values are due to organic matter partially derived from methanotrophs consuming biologically produced, 13C-depleted methane. These findings demonstrate the significant impact that biological activity has on the stream water chemistry exported from permafrost and glaciated environments in the Arctic. Given that the catchments studied here are representative of larger areas of the Arctic, occurrences of low δ13C-DOC values may be more widespread than previously recognized, with implications for understanding C cycling in these environments. Publisher PDF Peer reviewed |
author2 |
European Commission University of St Andrews. Earth and Environmental Sciences University of St Andrews. St Andrews Isotope Geochemistry |
format |
Article in Journal/Newspaper |
author |
Hindshaw, Ruth Lang, S Bernasconi, S Heaton, T Lindsay, M Boyd, E |
author_facet |
Hindshaw, Ruth Lang, S Bernasconi, S Heaton, T Lindsay, M Boyd, E |
author_sort |
Hindshaw, Ruth |
title |
Origin and temporal variability of unusually low δ13C-DOC values in two High Arctic catchments |
title_short |
Origin and temporal variability of unusually low δ13C-DOC values in two High Arctic catchments |
title_full |
Origin and temporal variability of unusually low δ13C-DOC values in two High Arctic catchments |
title_fullStr |
Origin and temporal variability of unusually low δ13C-DOC values in two High Arctic catchments |
title_full_unstemmed |
Origin and temporal variability of unusually low δ13C-DOC values in two High Arctic catchments |
title_sort |
origin and temporal variability of unusually low δ13c-doc values in two high arctic catchments |
publishDate |
2016 |
url |
http://hdl.handle.net/10023/9630 https://doi.org/10.1002/2015JG003303 http://onlinelibrary.wiley.com/doi/10.1002/2015JG003303/full#footer-support-info |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic permafrost |
genre_facet |
Arctic Arctic permafrost |
op_relation |
Journal of Geophysical Research - Biogeosciences Hindshaw , R , Lang , S , Bernasconi , S , Heaton , T , Lindsay , M & Boyd , E 2016 , ' Origin and temporal variability of unusually low δ 13 C-DOC values in two High Arctic catchments ' , Journal of Geophysical Research - Biogeosciences , vol. 121 , no. 4 , pp. 1073-1085 . https://doi.org/10.1002/2015JG003303 2169-8961 PURE: 241569915 PURE UUID: 0604ce37-5c69-44e0-98f1-41aadf527155 Scopus: 84962808604 WOS: 000378702800003 http://hdl.handle.net/10023/9630 https://doi.org/10.1002/2015JG003303 http://onlinelibrary.wiley.com/doi/10.1002/2015JG003303/full#footer-support-info PIEF-GA-2012-331501 |
op_rights |
© 2016. American Geophysical Union. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://dx.doi.org/10.1002/2015JG003303 |
op_doi |
https://doi.org/10.1002/2015JG003303 |
container_title |
Journal of Geophysical Research: Biogeosciences |
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121 |
container_issue |
4 |
container_start_page |
1073 |
op_container_end_page |
1085 |
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1770275172931076096 |