Atlantic walrus signal latitudinal differences in the long-term decline of sea ice-derived carbon to benthic fauna in the Canadian Arctic
Climate change is altering the biogeochemical and physical characteristics of the Arctic marine environment, which impacts sea ice algal and phytoplankton bloom dynamics and the vertical transport of these carbon sources to benthic communities. Little is known about whether the contribution of sea i...
Published in: | Proceedings of the Royal Society B: Biological Sciences |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2020
|
Subjects: | |
Online Access: | https://pure.uhi.ac.uk/en/publications/89c127e6-0f17-401b-a4c3-7162e3fc31ad https://doi.org/10.1098/rspb.2020.2126 https://pureadmin.uhi.ac.uk/ws/files/14699290/rspb.2020.2126.pdf https://royalsocietypublishing.org/doi/10.1098/rspb.2020.2126 |
id |
ftuhipublicatio:oai:pure.atira.dk:publications/89c127e6-0f17-401b-a4c3-7162e3fc31ad |
---|---|
record_format |
openpolar |
spelling |
ftuhipublicatio:oai:pure.atira.dk:publications/89c127e6-0f17-401b-a4c3-7162e3fc31ad 2024-09-15T17:51:08+00:00 Atlantic walrus signal latitudinal differences in the long-term decline of sea ice-derived carbon to benthic fauna in the Canadian Arctic Yurkowski, David J. Brown, Thomas A. Blanchfield, Paul J. Ferguson, Steven H. 2020-12-09 application/pdf https://pure.uhi.ac.uk/en/publications/89c127e6-0f17-401b-a4c3-7162e3fc31ad https://doi.org/10.1098/rspb.2020.2126 https://pureadmin.uhi.ac.uk/ws/files/14699290/rspb.2020.2126.pdf https://royalsocietypublishing.org/doi/10.1098/rspb.2020.2126 eng eng https://pure.uhi.ac.uk/en/publications/89c127e6-0f17-401b-a4c3-7162e3fc31ad info:eu-repo/semantics/openAccess Yurkowski , D J , Brown , T A , Blanchfield , P J & Ferguson , S H 2020 , ' Atlantic walrus signal latitudinal differences in the long-term decline of sea ice-derived carbon to benthic fauna in the Canadian Arctic ' , Proceedings of the Royal Society B: Biological Sciences , vol. 287 , no. 1940 . https://doi.org/10.1098/rspb.2020.2126 marine mammal carbon source lipid biomarker sea ice algae phytoplankton compund-specific stable isotope analysis of amino acids article 2020 ftuhipublicatio https://doi.org/10.1098/rspb.2020.2126 2024-07-22T23:37:24Z Climate change is altering the biogeochemical and physical characteristics of the Arctic marine environment, which impacts sea ice algal and phytoplankton bloom dynamics and the vertical transport of these carbon sources to benthic communities. Little is known about whether the contribution of sea ice-derived carbon to benthic fauna and nitrogen cycling has changed over multiple decades in concert with receding sea ice. We combined compound-specific stable isotope analysis of amino acids with highly branched isoprenoid diatom lipid biomarkers using archived (1982–2016) tissue of benthivorous Atlantic walrus to examine temporal trends of sea ice-derived carbon, nitrogen isotope baseline and trophic position of Atlantic walrus at high- and mid-latitudes in the Canadian Arctic. Associated with an 18% sea ice decline in the mid-Arctic, sea ice-derived carbon contribution to Atlantic walrus decreased by 75% suggesting a strong decoupling of sea ice-benthic habitats. By contrast, a nearly exclusive amount of sea ice-derived carbon was maintained in high-Arctic Atlantic walrus (98% in 1996 and 89% in 2006) despite a similar percentage in sea ice reduction. Nitrogen isotope baseline or the trophic position of Atlantic walrus did not change over time at either location. These findings indicate latitudinal differences in the restructuring of carbon energy sources used by Atlantic walrus and their benthic prey, and in turn a change in Arctic marine ecosystem functioning between sea ice–pelagic–benthic habitats. Article in Journal/Newspaper Arctic Climate change ice algae Phytoplankton Sea ice walrus* University of the Highlands and Islands: Research Database of UHI Proceedings of the Royal Society B: Biological Sciences 287 1940 20202126 |
institution |
Open Polar |
collection |
University of the Highlands and Islands: Research Database of UHI |
op_collection_id |
ftuhipublicatio |
language |
English |
topic |
marine mammal carbon source lipid biomarker sea ice algae phytoplankton compund-specific stable isotope analysis of amino acids |
spellingShingle |
marine mammal carbon source lipid biomarker sea ice algae phytoplankton compund-specific stable isotope analysis of amino acids Yurkowski, David J. Brown, Thomas A. Blanchfield, Paul J. Ferguson, Steven H. Atlantic walrus signal latitudinal differences in the long-term decline of sea ice-derived carbon to benthic fauna in the Canadian Arctic |
topic_facet |
marine mammal carbon source lipid biomarker sea ice algae phytoplankton compund-specific stable isotope analysis of amino acids |
description |
Climate change is altering the biogeochemical and physical characteristics of the Arctic marine environment, which impacts sea ice algal and phytoplankton bloom dynamics and the vertical transport of these carbon sources to benthic communities. Little is known about whether the contribution of sea ice-derived carbon to benthic fauna and nitrogen cycling has changed over multiple decades in concert with receding sea ice. We combined compound-specific stable isotope analysis of amino acids with highly branched isoprenoid diatom lipid biomarkers using archived (1982–2016) tissue of benthivorous Atlantic walrus to examine temporal trends of sea ice-derived carbon, nitrogen isotope baseline and trophic position of Atlantic walrus at high- and mid-latitudes in the Canadian Arctic. Associated with an 18% sea ice decline in the mid-Arctic, sea ice-derived carbon contribution to Atlantic walrus decreased by 75% suggesting a strong decoupling of sea ice-benthic habitats. By contrast, a nearly exclusive amount of sea ice-derived carbon was maintained in high-Arctic Atlantic walrus (98% in 1996 and 89% in 2006) despite a similar percentage in sea ice reduction. Nitrogen isotope baseline or the trophic position of Atlantic walrus did not change over time at either location. These findings indicate latitudinal differences in the restructuring of carbon energy sources used by Atlantic walrus and their benthic prey, and in turn a change in Arctic marine ecosystem functioning between sea ice–pelagic–benthic habitats. |
format |
Article in Journal/Newspaper |
author |
Yurkowski, David J. Brown, Thomas A. Blanchfield, Paul J. Ferguson, Steven H. |
author_facet |
Yurkowski, David J. Brown, Thomas A. Blanchfield, Paul J. Ferguson, Steven H. |
author_sort |
Yurkowski, David J. |
title |
Atlantic walrus signal latitudinal differences in the long-term decline of sea ice-derived carbon to benthic fauna in the Canadian Arctic |
title_short |
Atlantic walrus signal latitudinal differences in the long-term decline of sea ice-derived carbon to benthic fauna in the Canadian Arctic |
title_full |
Atlantic walrus signal latitudinal differences in the long-term decline of sea ice-derived carbon to benthic fauna in the Canadian Arctic |
title_fullStr |
Atlantic walrus signal latitudinal differences in the long-term decline of sea ice-derived carbon to benthic fauna in the Canadian Arctic |
title_full_unstemmed |
Atlantic walrus signal latitudinal differences in the long-term decline of sea ice-derived carbon to benthic fauna in the Canadian Arctic |
title_sort |
atlantic walrus signal latitudinal differences in the long-term decline of sea ice-derived carbon to benthic fauna in the canadian arctic |
publishDate |
2020 |
url |
https://pure.uhi.ac.uk/en/publications/89c127e6-0f17-401b-a4c3-7162e3fc31ad https://doi.org/10.1098/rspb.2020.2126 https://pureadmin.uhi.ac.uk/ws/files/14699290/rspb.2020.2126.pdf https://royalsocietypublishing.org/doi/10.1098/rspb.2020.2126 |
genre |
Arctic Climate change ice algae Phytoplankton Sea ice walrus* |
genre_facet |
Arctic Climate change ice algae Phytoplankton Sea ice walrus* |
op_source |
Yurkowski , D J , Brown , T A , Blanchfield , P J & Ferguson , S H 2020 , ' Atlantic walrus signal latitudinal differences in the long-term decline of sea ice-derived carbon to benthic fauna in the Canadian Arctic ' , Proceedings of the Royal Society B: Biological Sciences , vol. 287 , no. 1940 . https://doi.org/10.1098/rspb.2020.2126 |
op_relation |
https://pure.uhi.ac.uk/en/publications/89c127e6-0f17-401b-a4c3-7162e3fc31ad |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1098/rspb.2020.2126 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
287 |
container_issue |
1940 |
container_start_page |
20202126 |
_version_ |
1810292944919330816 |