Shells of the bivalve Astarte moerchi give new evidence of a strong pelagic-benthic coupling shift occurring since the late 1970s in the North Water polynya
Climate changes in the Arctic may weaken the currently tight pelagic-benthic coupling. In response to decreasing sea ice cover, arctic marine systems are expected to shift from a 'sea-ice algae-benthos' to a 'phytoplankton-zooplankton' dominance. We used mollusc shells as bioarch...
Published in: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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Online Access: | https://doi.org/10.1098/rsta.2019.0353 https://archimer.ifremer.fr/doc/00686/79854/82695.pdf https://archimer.ifremer.fr/doc/00686/79854/82696.docx |
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fttriple:oai:gotriple.eu:10670/1.cwfu62 2023-05-15T14:53:31+02:00 Shells of the bivalve Astarte moerchi give new evidence of a strong pelagic-benthic coupling shift occurring since the late 1970s in the North Water polynya Olivier, Frederic Gaillard, Blandine Thebault, Julien Meziane, Tarik Tremblay, Rejean Dumont, Dany Belanger, Simon Gosselin, Michel Jolivet, Aurelie Chauvaud, Laurent Martel, Andre L. Rysgaard, Soren Olivier, Anne-helene Pettre, Julien Mars, Jerome Gerber, Silvain Archambault, Philippe 2020-01-01 https://doi.org/10.1098/rsta.2019.0353 https://archimer.ifremer.fr/doc/00686/79854/82695.pdf https://archimer.ifremer.fr/doc/00686/79854/82696.docx en eng Royal Soc doi:10.1098/rsta.2019.0353 10670/1.cwfu62 https://archimer.ifremer.fr/doc/00686/79854/82695.pdf https://archimer.ifremer.fr/doc/00686/79854/82696.docx Archimer, archive institutionnelle de l'Ifremer Philosophical Transactions Of The Royal Society A-mathematical Physical And Engineering Sciences (1364-503X) (Royal Soc), 2020-10 , Vol. 378 , N. 2181 , P. 20190353 (23p.) envir geo Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2020 fttriple https://doi.org/10.1098/rsta.2019.0353 2023-01-22T17:09:09Z Climate changes in the Arctic may weaken the currently tight pelagic-benthic coupling. In response to decreasing sea ice cover, arctic marine systems are expected to shift from a 'sea-ice algae-benthos' to a 'phytoplankton-zooplankton' dominance. We used mollusc shells as bioarchives and fatty acid trophic markers to estimate the effects of the reduction of sea ice cover on the food exported to the seafloor. Bathyal bivalve Astarte moerchi living at 600m depth in northern Baffin Bay reveals a clear shift in growth variations and Ba/Ca ratios since the late 1970s, which we relate to a change in food availability. Tissue fatty acid compositions show that this species feeds mainly on microalgae exported from the euphotic zone to the seabed. We, therefore, suggest that changes in pelagic-benthic coupling are likely due either to local changes in sea ice dynamics, mediated through bottom-up regulation exerted by sea ice on phytoplankton production, or to a mismatch between phytoplankton bloom and zooplankton grazing due to phenological change. Both possibilities allow a more regular and increased transfer of food to the seabed. This article is part of the theme issue 'The changing Arctic Ocean: consequences for biological communities, biogeochemical processes and ecosystem functioning'. Text Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin ice algae Phytoplankton Sea ice Zooplankton Unknown Arctic Arctic Ocean Baffin Bay Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 378 2181 20190353 |
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envir geo |
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envir geo Olivier, Frederic Gaillard, Blandine Thebault, Julien Meziane, Tarik Tremblay, Rejean Dumont, Dany Belanger, Simon Gosselin, Michel Jolivet, Aurelie Chauvaud, Laurent Martel, Andre L. Rysgaard, Soren Olivier, Anne-helene Pettre, Julien Mars, Jerome Gerber, Silvain Archambault, Philippe Shells of the bivalve Astarte moerchi give new evidence of a strong pelagic-benthic coupling shift occurring since the late 1970s in the North Water polynya |
topic_facet |
envir geo |
description |
Climate changes in the Arctic may weaken the currently tight pelagic-benthic coupling. In response to decreasing sea ice cover, arctic marine systems are expected to shift from a 'sea-ice algae-benthos' to a 'phytoplankton-zooplankton' dominance. We used mollusc shells as bioarchives and fatty acid trophic markers to estimate the effects of the reduction of sea ice cover on the food exported to the seafloor. Bathyal bivalve Astarte moerchi living at 600m depth in northern Baffin Bay reveals a clear shift in growth variations and Ba/Ca ratios since the late 1970s, which we relate to a change in food availability. Tissue fatty acid compositions show that this species feeds mainly on microalgae exported from the euphotic zone to the seabed. We, therefore, suggest that changes in pelagic-benthic coupling are likely due either to local changes in sea ice dynamics, mediated through bottom-up regulation exerted by sea ice on phytoplankton production, or to a mismatch between phytoplankton bloom and zooplankton grazing due to phenological change. Both possibilities allow a more regular and increased transfer of food to the seabed. This article is part of the theme issue 'The changing Arctic Ocean: consequences for biological communities, biogeochemical processes and ecosystem functioning'. |
format |
Text |
author |
Olivier, Frederic Gaillard, Blandine Thebault, Julien Meziane, Tarik Tremblay, Rejean Dumont, Dany Belanger, Simon Gosselin, Michel Jolivet, Aurelie Chauvaud, Laurent Martel, Andre L. Rysgaard, Soren Olivier, Anne-helene Pettre, Julien Mars, Jerome Gerber, Silvain Archambault, Philippe |
author_facet |
Olivier, Frederic Gaillard, Blandine Thebault, Julien Meziane, Tarik Tremblay, Rejean Dumont, Dany Belanger, Simon Gosselin, Michel Jolivet, Aurelie Chauvaud, Laurent Martel, Andre L. Rysgaard, Soren Olivier, Anne-helene Pettre, Julien Mars, Jerome Gerber, Silvain Archambault, Philippe |
author_sort |
Olivier, Frederic |
title |
Shells of the bivalve Astarte moerchi give new evidence of a strong pelagic-benthic coupling shift occurring since the late 1970s in the North Water polynya |
title_short |
Shells of the bivalve Astarte moerchi give new evidence of a strong pelagic-benthic coupling shift occurring since the late 1970s in the North Water polynya |
title_full |
Shells of the bivalve Astarte moerchi give new evidence of a strong pelagic-benthic coupling shift occurring since the late 1970s in the North Water polynya |
title_fullStr |
Shells of the bivalve Astarte moerchi give new evidence of a strong pelagic-benthic coupling shift occurring since the late 1970s in the North Water polynya |
title_full_unstemmed |
Shells of the bivalve Astarte moerchi give new evidence of a strong pelagic-benthic coupling shift occurring since the late 1970s in the North Water polynya |
title_sort |
shells of the bivalve astarte moerchi give new evidence of a strong pelagic-benthic coupling shift occurring since the late 1970s in the north water polynya |
publisher |
Royal Soc |
publishDate |
2020 |
url |
https://doi.org/10.1098/rsta.2019.0353 https://archimer.ifremer.fr/doc/00686/79854/82695.pdf https://archimer.ifremer.fr/doc/00686/79854/82696.docx |
geographic |
Arctic Arctic Ocean Baffin Bay |
geographic_facet |
Arctic Arctic Ocean Baffin Bay |
genre |
Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin ice algae Phytoplankton Sea ice Zooplankton |
genre_facet |
Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin ice algae Phytoplankton Sea ice Zooplankton |
op_source |
Archimer, archive institutionnelle de l'Ifremer Philosophical Transactions Of The Royal Society A-mathematical Physical And Engineering Sciences (1364-503X) (Royal Soc), 2020-10 , Vol. 378 , N. 2181 , P. 20190353 (23p.) |
op_relation |
doi:10.1098/rsta.2019.0353 10670/1.cwfu62 https://archimer.ifremer.fr/doc/00686/79854/82695.pdf https://archimer.ifremer.fr/doc/00686/79854/82696.docx |
op_doi |
https://doi.org/10.1098/rsta.2019.0353 |
container_title |
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
container_volume |
378 |
container_issue |
2181 |
container_start_page |
20190353 |
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1766325110748217344 |