Processes controlling aggregate formation and distribution during the Arctic phytoplankton spring bloom in Baffin Bay
In the last decades, the Arctic Ocean has been affected by climate change, leading to alterations in the sea ice cover that influence the phytoplankton spring bloom, its associated food web, and therefore carbon sequestration. During the Green Edge 2016 expedition in the central Baffin Bay, the phyt...
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fttriple:oai:gotriple.eu:10670/1.g3tfbc 2023-05-15T14:59:57+02:00 Processes controlling aggregate formation and distribution during the Arctic phytoplankton spring bloom in Baffin Bay Toullec, Jordan Moriceau, Brivaela Vincent, Dorothée Guidi, Lionel Lafond, Augustin Babin, Marcel https://doi.org/10.1525/elementa.2021.00001 https://archimer.ifremer.fr/doc/00741/85347/90391.pdf https://archimer.ifremer.fr/doc/00741/85347/90392.docx en eng University of California Press doi:10.1525/elementa.2021.00001 10670/1.g3tfbc https://archimer.ifremer.fr/doc/00741/85347/90391.pdf https://archimer.ifremer.fr/doc/00741/85347/90392.docx other Archimer, archive institutionnelle de l'Ifremer Elementa: Science of the Anthropocene (2325-1026) (University of California Press), 2021-10 , Vol. 9 , N. 1 , P. 19p. envir geo Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.1525/elementa.2021.00001 2023-01-22T17:19:05Z In the last decades, the Arctic Ocean has been affected by climate change, leading to alterations in the sea ice cover that influence the phytoplankton spring bloom, its associated food web, and therefore carbon sequestration. During the Green Edge 2016 expedition in the central Baffin Bay, the phytoplankton spring bloom and its development around the ice edge was followed along 7 transects from open water to the ice-pack interior. Here, we studied some of the processes driving phytoplankton aggregation, using aggregate and copepod distribution profiles obtained with an underwater vision profiler deployed at several stations along the transects. Our results revealed a sequential pattern during sea ice retreat in phytoplankton production and in aggregate production and distribution. First, under sea ice, phytoplankton started to grow, but aggregates were not formed. Second, after sea ice melting, phytoplankton (diatoms and Phaeocystis spp. as the dominant groups) benefited from the light availability and stratified environment to bloom, and aggregation began coincident with nutrient depletion at the surface. Third, maxima of phytoplankton aggregates deepened in the water column and phytoplankton cells at the surface began to degrade. At most stations, silicate limitation began first, triggering aggregation of the phytoplankton cells; nitrate limitation came later. Copepods followed aggregates at the end of the phytoplankton bloom, possibly because aggregates provided higher quality food than senescing phytoplankton cells at the surface. These observations suggest that aggregation is involved in 2 export pathways constituting the biological pump: the gravitational pathway through the sinking of aggregates and fecal pellets and the migration pathway when zooplankton follow aggregates during food foraging. Text Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Climate change ice pack Phytoplankton Sea ice Zooplankton Copepods Unknown Arctic Arctic Ocean Baffin Bay Elementa: Science of the Anthropocene 9 1 |
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envir geo Toullec, Jordan Moriceau, Brivaela Vincent, Dorothée Guidi, Lionel Lafond, Augustin Babin, Marcel Processes controlling aggregate formation and distribution during the Arctic phytoplankton spring bloom in Baffin Bay |
topic_facet |
envir geo |
description |
In the last decades, the Arctic Ocean has been affected by climate change, leading to alterations in the sea ice cover that influence the phytoplankton spring bloom, its associated food web, and therefore carbon sequestration. During the Green Edge 2016 expedition in the central Baffin Bay, the phytoplankton spring bloom and its development around the ice edge was followed along 7 transects from open water to the ice-pack interior. Here, we studied some of the processes driving phytoplankton aggregation, using aggregate and copepod distribution profiles obtained with an underwater vision profiler deployed at several stations along the transects. Our results revealed a sequential pattern during sea ice retreat in phytoplankton production and in aggregate production and distribution. First, under sea ice, phytoplankton started to grow, but aggregates were not formed. Second, after sea ice melting, phytoplankton (diatoms and Phaeocystis spp. as the dominant groups) benefited from the light availability and stratified environment to bloom, and aggregation began coincident with nutrient depletion at the surface. Third, maxima of phytoplankton aggregates deepened in the water column and phytoplankton cells at the surface began to degrade. At most stations, silicate limitation began first, triggering aggregation of the phytoplankton cells; nitrate limitation came later. Copepods followed aggregates at the end of the phytoplankton bloom, possibly because aggregates provided higher quality food than senescing phytoplankton cells at the surface. These observations suggest that aggregation is involved in 2 export pathways constituting the biological pump: the gravitational pathway through the sinking of aggregates and fecal pellets and the migration pathway when zooplankton follow aggregates during food foraging. |
format |
Text |
author |
Toullec, Jordan Moriceau, Brivaela Vincent, Dorothée Guidi, Lionel Lafond, Augustin Babin, Marcel |
author_facet |
Toullec, Jordan Moriceau, Brivaela Vincent, Dorothée Guidi, Lionel Lafond, Augustin Babin, Marcel |
author_sort |
Toullec, Jordan |
title |
Processes controlling aggregate formation and distribution during the Arctic phytoplankton spring bloom in Baffin Bay |
title_short |
Processes controlling aggregate formation and distribution during the Arctic phytoplankton spring bloom in Baffin Bay |
title_full |
Processes controlling aggregate formation and distribution during the Arctic phytoplankton spring bloom in Baffin Bay |
title_fullStr |
Processes controlling aggregate formation and distribution during the Arctic phytoplankton spring bloom in Baffin Bay |
title_full_unstemmed |
Processes controlling aggregate formation and distribution during the Arctic phytoplankton spring bloom in Baffin Bay |
title_sort |
processes controlling aggregate formation and distribution during the arctic phytoplankton spring bloom in baffin bay |
publisher |
University of California Press |
url |
https://doi.org/10.1525/elementa.2021.00001 https://archimer.ifremer.fr/doc/00741/85347/90391.pdf https://archimer.ifremer.fr/doc/00741/85347/90392.docx |
geographic |
Arctic Arctic Ocean Baffin Bay |
geographic_facet |
Arctic Arctic Ocean Baffin Bay |
genre |
Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Climate change ice pack Phytoplankton Sea ice Zooplankton Copepods |
genre_facet |
Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Climate change ice pack Phytoplankton Sea ice Zooplankton Copepods |
op_source |
Archimer, archive institutionnelle de l'Ifremer Elementa: Science of the Anthropocene (2325-1026) (University of California Press), 2021-10 , Vol. 9 , N. 1 , P. 19p. |
op_relation |
doi:10.1525/elementa.2021.00001 10670/1.g3tfbc https://archimer.ifremer.fr/doc/00741/85347/90391.pdf https://archimer.ifremer.fr/doc/00741/85347/90392.docx |
op_rights |
other |
op_doi |
https://doi.org/10.1525/elementa.2021.00001 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
9 |
container_issue |
1 |
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1766332073405054976 |