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...
Published in: | Elementa: Science of the Anthropocene |
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University of California Press
2021
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ftarchimer:oai:archimer.ifremer.fr:85347 2023-05-15T14:55:43+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 2021-10 application/pdf https://archimer.ifremer.fr/doc/00741/85347/90391.pdf https://archimer.ifremer.fr/doc/00741/85347/90392.docx https://doi.org/10.1525/elementa.2021.00001 https://archimer.ifremer.fr/doc/00741/85347/ eng eng University of California Press https://archimer.ifremer.fr/doc/00741/85347/90391.pdf https://archimer.ifremer.fr/doc/00741/85347/90392.docx doi:10.1525/elementa.2021.00001 https://archimer.ifremer.fr/doc/00741/85347/ info:eu-repo/semantics/openAccess restricted use Elementa: Science of the Anthropocene (2325-1026) (University of California Press), 2021-10 , Vol. 9 , N. 1 , P. 19p. Arctic phytoplankton spring bloom Baffin Bay Sea ice Diatoms Phaeocystis spp Copepods Marine snow Aggregates UVP5 text Publication info:eu-repo/semantics/article 2021 ftarchimer https://doi.org/10.1525/elementa.2021.00001 2021-12-28T23:48:58Z 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. Article in Journal/Newspaper Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Climate change ice pack Phytoplankton Sea ice Zooplankton Copepods Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic Arctic Ocean Baffin Bay Elementa: Science of the Anthropocene 9 1 |
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 |
Arctic phytoplankton spring bloom Baffin Bay Sea ice Diatoms Phaeocystis spp Copepods Marine snow Aggregates UVP5 |
spellingShingle |
Arctic phytoplankton spring bloom Baffin Bay Sea ice Diatoms Phaeocystis spp Copepods Marine snow Aggregates UVP5 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 |
Arctic phytoplankton spring bloom Baffin Bay Sea ice Diatoms Phaeocystis spp Copepods Marine snow Aggregates UVP5 |
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 |
Article in Journal/Newspaper |
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 |
publishDate |
2021 |
url |
https://archimer.ifremer.fr/doc/00741/85347/90391.pdf https://archimer.ifremer.fr/doc/00741/85347/90392.docx https://doi.org/10.1525/elementa.2021.00001 https://archimer.ifremer.fr/doc/00741/85347/ |
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 |
Elementa: Science of the Anthropocene (2325-1026) (University of California Press), 2021-10 , Vol. 9 , N. 1 , P. 19p. |
op_relation |
https://archimer.ifremer.fr/doc/00741/85347/90391.pdf https://archimer.ifremer.fr/doc/00741/85347/90392.docx doi:10.1525/elementa.2021.00001 https://archimer.ifremer.fr/doc/00741/85347/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1525/elementa.2021.00001 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
9 |
container_issue |
1 |
_version_ |
1766327745380352000 |