Food resources of the bivalve Astarte elliptica in a sub-Arctic fjord:A multi-biomarker approach
It is generally agreed that pelagic-benthic coupling is tight on Arctic shelves, i.e. that organic matter produced in the surface layers supports the seafloor and benthos. However, this paradigm is mainly based on the assumption that phytoplankton and ice algae are the main sources of carbon for the...
Published in: | Marine Ecology Progress Series |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2017
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Online Access: | https://pure.au.dk/portal/en/publications/4d4b9e97-4454-4873-a7a5-a02fe25acabf https://doi.org/10.3354/meps12036 http://www.scopus.com/inward/record.url?scp=85020403043&partnerID=8YFLogxK |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/4d4b9e97-4454-4873-a7a5-a02fe25acabf 2024-02-11T09:59:32+01:00 Food resources of the bivalve Astarte elliptica in a sub-Arctic fjord:A multi-biomarker approach Gaillard, Blandine Meziane, Tarik Tremblay, Réjean Archambault, Philippe Blicher, Martin E. Chauvaud, Laurent Rysgaard, Søren Olivier, Frédéric 2017-03-13 https://pure.au.dk/portal/en/publications/4d4b9e97-4454-4873-a7a5-a02fe25acabf https://doi.org/10.3354/meps12036 http://www.scopus.com/inward/record.url?scp=85020403043&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/en/publications/4d4b9e97-4454-4873-a7a5-a02fe25acabf info:eu-repo/semantics/closedAccess Gaillard , B , Meziane , T , Tremblay , R , Archambault , P , Blicher , M E , Chauvaud , L , Rysgaard , S & Olivier , F 2017 , ' Food resources of the bivalve Astarte elliptica in a sub-Arctic fjord : A multi-biomarker approach ' , Marine Ecology - Progress Series , vol. 567 , pp. 139-156 . https://doi.org/10.3354/meps12036 Trophic ecology • Stable isotopes • Fatty acid trophic markers • Compound-specific stable isotope analysis • Sub-Arctic fjord • Bivalve article 2017 ftuniaarhuspubl https://doi.org/10.3354/meps12036 2024-01-17T23:59:46Z It is generally agreed that pelagic-benthic coupling is tight on Arctic shelves, i.e. that organic matter produced in the surface layers supports the seafloor and benthos. However, this paradigm is mainly based on the assumption that phytoplankton and ice algae are the main sources of carbon for the benthic communities. Climate change is expected to alter the relative contribution of food sources for benthic organisms. Macroalgal biomass is predicted to increase in near-shore systems in response to increased temperature and reduced sea ice cover. Thus, a better understanding of the relative contribution of benthic and pelagic components in benthic food webs in the Arctic is needed. In this study, a multi-biomarker approach (stable isotopes, fatty acid trophic markers, and compound-specific stable isotope analysis) was applied to link potential sources of carbon, including particulate organic matter from subsurface and bottom waters, sediment organic matter, and 6 macroalgal species to the diet of the bivalve Astarte elliptica collected below the euphotic zone in a sub-Arctic fjord (Kobbefjord, Greenland). Results showed that A. elliptica feeds on particulate and sediment organic matter and that brown macroalgae significantly support the Arctic benthic food web. Multi-biomarker approaches can be used to determine the diet of benthic organisms and track temporal variability in sources of food. It therefore appears to be an interesting method to study food regime strategies in response to changing primary production dynamics. Article in Journal/Newspaper Arctic Arctic Climate change Greenland ice algae Phytoplankton Sea ice Aarhus University: Research Arctic Greenland Kobbefjord ENVELOPE(-51.527,-51.527,64.177,64.177) Marine Ecology Progress Series 567 139 156 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Trophic ecology • Stable isotopes • Fatty acid trophic markers • Compound-specific stable isotope analysis • Sub-Arctic fjord • Bivalve |
spellingShingle |
Trophic ecology • Stable isotopes • Fatty acid trophic markers • Compound-specific stable isotope analysis • Sub-Arctic fjord • Bivalve Gaillard, Blandine Meziane, Tarik Tremblay, Réjean Archambault, Philippe Blicher, Martin E. Chauvaud, Laurent Rysgaard, Søren Olivier, Frédéric Food resources of the bivalve Astarte elliptica in a sub-Arctic fjord:A multi-biomarker approach |
topic_facet |
Trophic ecology • Stable isotopes • Fatty acid trophic markers • Compound-specific stable isotope analysis • Sub-Arctic fjord • Bivalve |
description |
It is generally agreed that pelagic-benthic coupling is tight on Arctic shelves, i.e. that organic matter produced in the surface layers supports the seafloor and benthos. However, this paradigm is mainly based on the assumption that phytoplankton and ice algae are the main sources of carbon for the benthic communities. Climate change is expected to alter the relative contribution of food sources for benthic organisms. Macroalgal biomass is predicted to increase in near-shore systems in response to increased temperature and reduced sea ice cover. Thus, a better understanding of the relative contribution of benthic and pelagic components in benthic food webs in the Arctic is needed. In this study, a multi-biomarker approach (stable isotopes, fatty acid trophic markers, and compound-specific stable isotope analysis) was applied to link potential sources of carbon, including particulate organic matter from subsurface and bottom waters, sediment organic matter, and 6 macroalgal species to the diet of the bivalve Astarte elliptica collected below the euphotic zone in a sub-Arctic fjord (Kobbefjord, Greenland). Results showed that A. elliptica feeds on particulate and sediment organic matter and that brown macroalgae significantly support the Arctic benthic food web. Multi-biomarker approaches can be used to determine the diet of benthic organisms and track temporal variability in sources of food. It therefore appears to be an interesting method to study food regime strategies in response to changing primary production dynamics. |
format |
Article in Journal/Newspaper |
author |
Gaillard, Blandine Meziane, Tarik Tremblay, Réjean Archambault, Philippe Blicher, Martin E. Chauvaud, Laurent Rysgaard, Søren Olivier, Frédéric |
author_facet |
Gaillard, Blandine Meziane, Tarik Tremblay, Réjean Archambault, Philippe Blicher, Martin E. Chauvaud, Laurent Rysgaard, Søren Olivier, Frédéric |
author_sort |
Gaillard, Blandine |
title |
Food resources of the bivalve Astarte elliptica in a sub-Arctic fjord:A multi-biomarker approach |
title_short |
Food resources of the bivalve Astarte elliptica in a sub-Arctic fjord:A multi-biomarker approach |
title_full |
Food resources of the bivalve Astarte elliptica in a sub-Arctic fjord:A multi-biomarker approach |
title_fullStr |
Food resources of the bivalve Astarte elliptica in a sub-Arctic fjord:A multi-biomarker approach |
title_full_unstemmed |
Food resources of the bivalve Astarte elliptica in a sub-Arctic fjord:A multi-biomarker approach |
title_sort |
food resources of the bivalve astarte elliptica in a sub-arctic fjord:a multi-biomarker approach |
publishDate |
2017 |
url |
https://pure.au.dk/portal/en/publications/4d4b9e97-4454-4873-a7a5-a02fe25acabf https://doi.org/10.3354/meps12036 http://www.scopus.com/inward/record.url?scp=85020403043&partnerID=8YFLogxK |
long_lat |
ENVELOPE(-51.527,-51.527,64.177,64.177) |
geographic |
Arctic Greenland Kobbefjord |
geographic_facet |
Arctic Greenland Kobbefjord |
genre |
Arctic Arctic Climate change Greenland ice algae Phytoplankton Sea ice |
genre_facet |
Arctic Arctic Climate change Greenland ice algae Phytoplankton Sea ice |
op_source |
Gaillard , B , Meziane , T , Tremblay , R , Archambault , P , Blicher , M E , Chauvaud , L , Rysgaard , S & Olivier , F 2017 , ' Food resources of the bivalve Astarte elliptica in a sub-Arctic fjord : A multi-biomarker approach ' , Marine Ecology - Progress Series , vol. 567 , pp. 139-156 . https://doi.org/10.3354/meps12036 |
op_relation |
https://pure.au.dk/portal/en/publications/4d4b9e97-4454-4873-a7a5-a02fe25acabf |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.3354/meps12036 |
container_title |
Marine Ecology Progress Series |
container_volume |
567 |
container_start_page |
139 |
op_container_end_page |
156 |
_version_ |
1790595397192777728 |