Origin and temporal variability of unusually low δ 13 C-DOC values in two High Arctic catchments
The stable carbon isotopic composition of dissolved organic matter (δ 13 C-DOC) reveals information about its source and extent of biological processing. Here we report the lowest δ 13 C-DOC values (−43.8‰) measured to date in surface waters. The streams were located in the High Arctic, a region cur...
Published in: | Journal of Geophysical Research: Biogeosciences |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2016
|
Subjects: | |
Online Access: | https://research-portal.st-andrews.ac.uk/en/researchoutput/origin-and-temporal-variability-of-unusually-low-13cdoc-values-in-two-high-arctic-catchments(0604ce37-5c69-44e0-98f1-41aadf527155).html https://doi.org/10.1002/2015JG003303 https://research-repository.st-andrews.ac.uk/bitstream/10023/9630/1/Hindshaw_2016_JGR_Origin_FinalPublishedVersion.pdf http://onlinelibrary.wiley.com/doi/10.1002/2015JG003303/full#footer-support-info |
id |
ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/0604ce37-5c69-44e0-98f1-41aadf527155 |
---|---|
record_format |
openpolar |
spelling |
ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/0604ce37-5c69-44e0-98f1-41aadf527155 2024-06-23T07:48:24+00:00 Origin and temporal variability of unusually low δ 13 C-DOC values in two High Arctic catchments Hindshaw, Ruth Lang, S Bernasconi, S Heaton, T Lindsay, M Boyd, E 2016-04 application/pdf https://research-portal.st-andrews.ac.uk/en/researchoutput/origin-and-temporal-variability-of-unusually-low-13cdoc-values-in-two-high-arctic-catchments(0604ce37-5c69-44e0-98f1-41aadf527155).html https://doi.org/10.1002/2015JG003303 https://research-repository.st-andrews.ac.uk/bitstream/10023/9630/1/Hindshaw_2016_JGR_Origin_FinalPublishedVersion.pdf http://onlinelibrary.wiley.com/doi/10.1002/2015JG003303/full#footer-support-info eng eng https://research-portal.st-andrews.ac.uk/en/researchoutput/origin-and-temporal-variability-of-unusually-low-13cdoc-values-in-two-high-arctic-catchments(0604ce37-5c69-44e0-98f1-41aadf527155).html info:eu-repo/semantics/openAccess 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 article 2016 ftunstandrewcris https://doi.org/10.1002/2015JG003303 2024-06-13T00:51:34Z The stable carbon isotopic composition of dissolved organic matter (δ 13 C-DOC) reveals information about its source and extent of biological processing. Here we report the lowest δ 13 C-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 δ 13 C-DOC values are due to organic matter partially derived from methanotrophs consuming biologically produced, 13 C-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 δ 13 C-DOC values may be more widespread than previously recognized, with implications for understanding C cycling in these environments. Article in Journal/Newspaper Arctic Arctic permafrost University of St Andrews: Research Portal Arctic Journal of Geophysical Research: Biogeosciences 121 4 1073 1085 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
description |
The stable carbon isotopic composition of dissolved organic matter (δ 13 C-DOC) reveals information about its source and extent of biological processing. Here we report the lowest δ 13 C-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 δ 13 C-DOC values are due to organic matter partially derived from methanotrophs consuming biologically produced, 13 C-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 δ 13 C-DOC values may be more widespread than previously recognized, with implications for understanding C cycling in these environments. |
format |
Article in Journal/Newspaper |
author |
Hindshaw, Ruth Lang, S Bernasconi, S Heaton, T Lindsay, M Boyd, E |
spellingShingle |
Hindshaw, Ruth Lang, S Bernasconi, S Heaton, T Lindsay, M Boyd, E Origin and temporal variability of unusually low δ 13 C-DOC values in two High Arctic catchments |
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 δ 13 C-DOC values in two High Arctic catchments |
title_short |
Origin and temporal variability of unusually low δ 13 C-DOC values in two High Arctic catchments |
title_full |
Origin and temporal variability of unusually low δ 13 C-DOC values in two High Arctic catchments |
title_fullStr |
Origin and temporal variability of unusually low δ 13 C-DOC values in two High Arctic catchments |
title_full_unstemmed |
Origin and temporal variability of unusually low δ 13 C-DOC values in two High Arctic catchments |
title_sort |
origin and temporal variability of unusually low δ 13 c-doc values in two high arctic catchments |
publishDate |
2016 |
url |
https://research-portal.st-andrews.ac.uk/en/researchoutput/origin-and-temporal-variability-of-unusually-low-13cdoc-values-in-two-high-arctic-catchments(0604ce37-5c69-44e0-98f1-41aadf527155).html https://doi.org/10.1002/2015JG003303 https://research-repository.st-andrews.ac.uk/bitstream/10023/9630/1/Hindshaw_2016_JGR_Origin_FinalPublishedVersion.pdf 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_source |
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 |
op_relation |
https://research-portal.st-andrews.ac.uk/en/researchoutput/origin-and-temporal-variability-of-unusually-low-13cdoc-values-in-two-high-arctic-catchments(0604ce37-5c69-44e0-98f1-41aadf527155).html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2015JG003303 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
121 |
container_issue |
4 |
container_start_page |
1073 |
op_container_end_page |
1085 |
_version_ |
1802638811240333312 |