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...
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ftarchimer:oai:archimer.ifremer.fr:72824 2023-05-15T14:41:25+02:00 Food resources of the bivalve Astarte elliptica in a sub-Arctic fjord: a multi-biomarker approach Gaillard, Blandine Meziane, Tarik Tremblay, Rejean Archambault, Philippe Blicher, Martin E. Chauvaud, Laurent Rysgaard, Soren Olivier, Frederic 2017-03 application/pdf https://archimer.ifremer.fr/doc/00616/72824/72328.pdf https://archimer.ifremer.fr/doc/00616/72824/72329.pdf https://doi.org/10.3354/meps12036 https://archimer.ifremer.fr/doc/00616/72824/ eng eng Inter-research https://archimer.ifremer.fr/doc/00616/72824/72328.pdf https://archimer.ifremer.fr/doc/00616/72824/72329.pdf doi:10.3354/meps12036 https://archimer.ifremer.fr/doc/00616/72824/ info:eu-repo/semantics/openAccess restricted use Marine Ecology Progress Series (0171-8630) (Inter-research), 2017-03 , Vol. 567 , P. 139-156 Trophic ecology Stable isotopes Fatty acid trophic markers Compound-specific stable isotope analysis Sub-Arctic fjord Bivalve text Publication info:eu-repo/semantics/article 2017 ftarchimer https://doi.org/10.3354/meps12036 2022-03-15T23:50:01Z 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 Climate change Greenland ice algae Phytoplankton Sea ice Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic Greenland Kobbefjord ENVELOPE(-51.527,-51.527,64.177,64.177) Marine Ecology Progress Series 567 139 156 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
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, Rejean Archambault, Philippe Blicher, Martin E. Chauvaud, Laurent Rysgaard, Soren Olivier, Frederic 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, Rejean Archambault, Philippe Blicher, Martin E. Chauvaud, Laurent Rysgaard, Soren Olivier, Frederic |
author_facet |
Gaillard, Blandine Meziane, Tarik Tremblay, Rejean Archambault, Philippe Blicher, Martin E. Chauvaud, Laurent Rysgaard, Soren Olivier, Frederic |
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 |
publisher |
Inter-research |
publishDate |
2017 |
url |
https://archimer.ifremer.fr/doc/00616/72824/72328.pdf https://archimer.ifremer.fr/doc/00616/72824/72329.pdf https://doi.org/10.3354/meps12036 https://archimer.ifremer.fr/doc/00616/72824/ |
long_lat |
ENVELOPE(-51.527,-51.527,64.177,64.177) |
geographic |
Arctic Greenland Kobbefjord |
geographic_facet |
Arctic Greenland Kobbefjord |
genre |
Arctic Climate change Greenland ice algae Phytoplankton Sea ice |
genre_facet |
Arctic Climate change Greenland ice algae Phytoplankton Sea ice |
op_source |
Marine Ecology Progress Series (0171-8630) (Inter-research), 2017-03 , Vol. 567 , P. 139-156 |
op_relation |
https://archimer.ifremer.fr/doc/00616/72824/72328.pdf https://archimer.ifremer.fr/doc/00616/72824/72329.pdf doi:10.3354/meps12036 https://archimer.ifremer.fr/doc/00616/72824/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
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_ |
1766313192917565440 |