Temporal and spatial trends in marine carbon isotopes in the Arctic Ocean and implications for food web studies
The Arctic is undergoing unprecedented environmental change. Rapid warming, decline in sea ice extent, increase in riverine input, ocean acidification and changes in primary productivity are creating a crucible for multiple concurrent environmental stressors, with unknown consequences for the entire...
Published in: | Global Change Biology |
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2019
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Online Access: | https://pure.uhi.ac.uk/en/publications/00e5673c-5ce0-44b1-89c2-922168267293 https://doi.org/10.1111/gcb.14832 https://www.research.ed.ac.uk/portal/en/publications/temporal-and-spatial-trends-in-marine-carbon-isotopes-in-the-arctic-ocean-and-implications-for-food-web-studies(bc1ae285-b184-4560-9500-bf006e070c22).html https://onlinelibrary.wiley.com/doi/abs/10.1111/gcb.14832 |
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ftuhipublicatio:oai:pure.atira.dk:publications/00e5673c-5ce0-44b1-89c2-922168267293 2024-05-12T07:57:24+00:00 Temporal and spatial trends in marine carbon isotopes in the Arctic Ocean and implications for food web studies De La Vega, Camille Jeffreys, Rachel M. Tuerena, Robyn Ganeshram, Raja Mahaffey, Claire 2019-12-01 https://pure.uhi.ac.uk/en/publications/00e5673c-5ce0-44b1-89c2-922168267293 https://doi.org/10.1111/gcb.14832 https://www.research.ed.ac.uk/portal/en/publications/temporal-and-spatial-trends-in-marine-carbon-isotopes-in-the-arctic-ocean-and-implications-for-food-web-studies(bc1ae285-b184-4560-9500-bf006e070c22).html https://onlinelibrary.wiley.com/doi/abs/10.1111/gcb.14832 eng eng https://pure.uhi.ac.uk/en/publications/00e5673c-5ce0-44b1-89c2-922168267293 info:eu-repo/semantics/openAccess De La Vega , C , Jeffreys , R M , Tuerena , R , Ganeshram , R & Mahaffey , C 2019 , ' Temporal and spatial trends in marine carbon isotopes in the Arctic Ocean and implications for food web studies ' , Global Change Biology , vol. 25 , no. 12 , pp. 4116-4130 . https://doi.org/10.1111/gcb.14832 7ref2021 article 2019 ftuhipublicatio https://doi.org/10.1111/gcb.14832 2024-04-18T00:12:20Z The Arctic is undergoing unprecedented environmental change. Rapid warming, decline in sea ice extent, increase in riverine input, ocean acidification and changes in primary productivity are creating a crucible for multiple concurrent environmental stressors, with unknown consequences for the entire arctic ecosystem. Here, we synthesised 30 years of data on the stable carbon isotope (δ13C) signatures in dissolved inorganic carbon (δ13C‐DIC; 1977 to 2014), marine and riverine particulate organic carbon (δ13C‐POC; 1986 to 2013) and tissues of marine mammals in the Arctic. δ13C values in consumers can change as a result of environmentally driven variation in the δ13C values at the base of the food web or alteration in the trophic structure, thus providing a method to assess the sensitivity of food webs to environmental change. Our synthesis reveals a spatially heterogeneous and temporally evolving δ13C baseline, with spatial gradients in the δ13C‐POC values between arctic shelves and arctic basins likely driven by differences in productivity and riverine and coastal influence. We report a decline in δ13C‐DIC values (‐0.011 ‰ y‐1) in the Arctic, reflecting increasing anthropogenic carbon dioxide (CO2) in the Arctic Ocean (i.e. Suess effect), which is larger than predicted. The larger decline in δ13C‐POC values and δ13C in arctic marine mammals reflects the anthropogenic CO2 signal as well as the influence of a changing arctic environment. Combining the influence of changing sea ice conditions and isotopic fractionation by phytoplankton, we explain the decadal decline in δ13C‐POC values in the Arctic Ocean and partially explain the δ13C values in marine mammals with consideration of time‐varying integration of δ13C values. The response of the arctic ecosystem to ongoing environmental change is stronger than we would predict theoretically, which has tremendous implications for the study of food webs in the rapidly changing Arctic Ocean. Article in Journal/Newspaper Arctic Arctic marine mammals Arctic Arctic Ocean Ocean acidification Phytoplankton Sea ice University of the Highlands and Islands: Research Database of UHI Arctic Arctic Ocean Global Change Biology 25 12 4116 4130 |
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Open Polar |
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University of the Highlands and Islands: Research Database of UHI |
op_collection_id |
ftuhipublicatio |
language |
English |
topic |
7ref2021 |
spellingShingle |
7ref2021 De La Vega, Camille Jeffreys, Rachel M. Tuerena, Robyn Ganeshram, Raja Mahaffey, Claire Temporal and spatial trends in marine carbon isotopes in the Arctic Ocean and implications for food web studies |
topic_facet |
7ref2021 |
description |
The Arctic is undergoing unprecedented environmental change. Rapid warming, decline in sea ice extent, increase in riverine input, ocean acidification and changes in primary productivity are creating a crucible for multiple concurrent environmental stressors, with unknown consequences for the entire arctic ecosystem. Here, we synthesised 30 years of data on the stable carbon isotope (δ13C) signatures in dissolved inorganic carbon (δ13C‐DIC; 1977 to 2014), marine and riverine particulate organic carbon (δ13C‐POC; 1986 to 2013) and tissues of marine mammals in the Arctic. δ13C values in consumers can change as a result of environmentally driven variation in the δ13C values at the base of the food web or alteration in the trophic structure, thus providing a method to assess the sensitivity of food webs to environmental change. Our synthesis reveals a spatially heterogeneous and temporally evolving δ13C baseline, with spatial gradients in the δ13C‐POC values between arctic shelves and arctic basins likely driven by differences in productivity and riverine and coastal influence. We report a decline in δ13C‐DIC values (‐0.011 ‰ y‐1) in the Arctic, reflecting increasing anthropogenic carbon dioxide (CO2) in the Arctic Ocean (i.e. Suess effect), which is larger than predicted. The larger decline in δ13C‐POC values and δ13C in arctic marine mammals reflects the anthropogenic CO2 signal as well as the influence of a changing arctic environment. Combining the influence of changing sea ice conditions and isotopic fractionation by phytoplankton, we explain the decadal decline in δ13C‐POC values in the Arctic Ocean and partially explain the δ13C values in marine mammals with consideration of time‐varying integration of δ13C values. The response of the arctic ecosystem to ongoing environmental change is stronger than we would predict theoretically, which has tremendous implications for the study of food webs in the rapidly changing Arctic Ocean. |
format |
Article in Journal/Newspaper |
author |
De La Vega, Camille Jeffreys, Rachel M. Tuerena, Robyn Ganeshram, Raja Mahaffey, Claire |
author_facet |
De La Vega, Camille Jeffreys, Rachel M. Tuerena, Robyn Ganeshram, Raja Mahaffey, Claire |
author_sort |
De La Vega, Camille |
title |
Temporal and spatial trends in marine carbon isotopes in the Arctic Ocean and implications for food web studies |
title_short |
Temporal and spatial trends in marine carbon isotopes in the Arctic Ocean and implications for food web studies |
title_full |
Temporal and spatial trends in marine carbon isotopes in the Arctic Ocean and implications for food web studies |
title_fullStr |
Temporal and spatial trends in marine carbon isotopes in the Arctic Ocean and implications for food web studies |
title_full_unstemmed |
Temporal and spatial trends in marine carbon isotopes in the Arctic Ocean and implications for food web studies |
title_sort |
temporal and spatial trends in marine carbon isotopes in the arctic ocean and implications for food web studies |
publishDate |
2019 |
url |
https://pure.uhi.ac.uk/en/publications/00e5673c-5ce0-44b1-89c2-922168267293 https://doi.org/10.1111/gcb.14832 https://www.research.ed.ac.uk/portal/en/publications/temporal-and-spatial-trends-in-marine-carbon-isotopes-in-the-arctic-ocean-and-implications-for-food-web-studies(bc1ae285-b184-4560-9500-bf006e070c22).html https://onlinelibrary.wiley.com/doi/abs/10.1111/gcb.14832 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic marine mammals Arctic Arctic Ocean Ocean acidification Phytoplankton Sea ice |
genre_facet |
Arctic Arctic marine mammals Arctic Arctic Ocean Ocean acidification Phytoplankton Sea ice |
op_source |
De La Vega , C , Jeffreys , R M , Tuerena , R , Ganeshram , R & Mahaffey , C 2019 , ' Temporal and spatial trends in marine carbon isotopes in the Arctic Ocean and implications for food web studies ' , Global Change Biology , vol. 25 , no. 12 , pp. 4116-4130 . https://doi.org/10.1111/gcb.14832 |
op_relation |
https://pure.uhi.ac.uk/en/publications/00e5673c-5ce0-44b1-89c2-922168267293 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/gcb.14832 |
container_title |
Global Change Biology |
container_volume |
25 |
container_issue |
12 |
container_start_page |
4116 |
op_container_end_page |
4130 |
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1798837751199563776 |