Late spring bloom development of pelagic diatoms in Baffin Bay
The Arctic Ocean is particularly affected by climate change, with changes in sea ice cover expected to impact phytoplankton primary production. During the Green Edge expedition, the development of the late spring-early summer diatom bloom was studied in relation with the sea ice retreat by multiple...
Published in: | Elementa: Science of the Anthropocene |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Univ California Press
2019
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Online Access: | https://archimer.ifremer.fr/doc/00615/72752/72021.pdf https://archimer.ifremer.fr/doc/00615/72752/72022.pdf https://doi.org/10.1525/elementa.382 https://archimer.ifremer.fr/doc/00615/72752/ |
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ftarchimer:oai:archimer.ifremer.fr:72752 2023-05-15T14:56:44+02:00 Late spring bloom development of pelagic diatoms in Baffin Bay Lafond, Augustin Leblanc, Karine Queguiner, Bernard Moriceau, Brivaela Leynaert, Aude Cornet, Veronique Legras, Justine Ras, Josephine Parenteau, Marie Garcia, Nicole Babin, Marcel Tremblay, Jean-eric 2019-11 application/pdf https://archimer.ifremer.fr/doc/00615/72752/72021.pdf https://archimer.ifremer.fr/doc/00615/72752/72022.pdf https://doi.org/10.1525/elementa.382 https://archimer.ifremer.fr/doc/00615/72752/ eng eng Univ California Press https://archimer.ifremer.fr/doc/00615/72752/72021.pdf https://archimer.ifremer.fr/doc/00615/72752/72022.pdf doi:10.1525/elementa.382 https://archimer.ifremer.fr/doc/00615/72752/ info:eu-repo/semantics/openAccess restricted use Elementa-science Of The Anthropocene (2325-1026) (Univ California Press), 2019-11 , Vol. 7 , N. 44 , P. 24p. Diatoms Spring bloom Sea ice Community composition Baffin Bay Arctic text Publication info:eu-repo/semantics/article 2019 ftarchimer https://doi.org/10.1525/elementa.382 2021-09-23T20:34:50Z The Arctic Ocean is particularly affected by climate change, with changes in sea ice cover expected to impact phytoplankton primary production. During the Green Edge expedition, the development of the late spring-early summer diatom bloom was studied in relation with the sea ice retreat by multiple transects across the marginal ice zone. Biogenic silica concentrations and uptake rates were measured. In addition, diatom assemblage structures and their associated carbon biomass were determined, along with taxon-specific contributions to total biogenic silica production using the fluorescent dye PDMPO. Results indicate that a diatom bloom developed in open waters close to the ice edge, following the alleviation of light limitation, and extended 20-30 km underneath the ice pack. This actively growing diatom bloom (up to 0.19 mu mol Si L-1 d(-1)) was associated with high biogenic silica concentrations (up to 2.15 mu mol L-1), and was dominated by colonial fast-growing centric (Chaetoceros spp. and Thalassiosira spp.) and ribbon-forming pennate species (Fragilariopsis spp./Fossula arctica). The bloom remained concentrated over the shallow Greenland shelf and slope, in Atlantic-influenced waters, and weakened as it moved westwards toward ice-free Pacific-influenced waters. The development resulted in a near depletion of all nutrients eastwards of the bay, which probably induced the formation of resting spores of Melosira arctica. In contrast, under the ice pack, nutrients had not yet been consumed. Biogenic silica and uptake rates were still low (respectively <0.5 mu mol L-1 and <0.05 mu mol L-1 d(-1)), although elevated specific Si uptake rates (up to 0.23 d(-1)) probably reflected early stages of the bloom. These diatoms were dominated by pennate species (Pseudo-nitzschia spp., Ceratoneis closterium, and Fragilariopsis spp./Fossula arctica). This study can contribute to predictions of the future response of Arctic diatoms in the context of climate change. Article in Journal/Newspaper Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Climate change Greenland ice pack Phytoplankton Sea ice Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic Arctic Ocean Baffin Bay Greenland Pacific Elementa: Science of the Anthropocene 7 |
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 |
Diatoms Spring bloom Sea ice Community composition Baffin Bay Arctic |
spellingShingle |
Diatoms Spring bloom Sea ice Community composition Baffin Bay Arctic Lafond, Augustin Leblanc, Karine Queguiner, Bernard Moriceau, Brivaela Leynaert, Aude Cornet, Veronique Legras, Justine Ras, Josephine Parenteau, Marie Garcia, Nicole Babin, Marcel Tremblay, Jean-eric Late spring bloom development of pelagic diatoms in Baffin Bay |
topic_facet |
Diatoms Spring bloom Sea ice Community composition Baffin Bay Arctic |
description |
The Arctic Ocean is particularly affected by climate change, with changes in sea ice cover expected to impact phytoplankton primary production. During the Green Edge expedition, the development of the late spring-early summer diatom bloom was studied in relation with the sea ice retreat by multiple transects across the marginal ice zone. Biogenic silica concentrations and uptake rates were measured. In addition, diatom assemblage structures and their associated carbon biomass were determined, along with taxon-specific contributions to total biogenic silica production using the fluorescent dye PDMPO. Results indicate that a diatom bloom developed in open waters close to the ice edge, following the alleviation of light limitation, and extended 20-30 km underneath the ice pack. This actively growing diatom bloom (up to 0.19 mu mol Si L-1 d(-1)) was associated with high biogenic silica concentrations (up to 2.15 mu mol L-1), and was dominated by colonial fast-growing centric (Chaetoceros spp. and Thalassiosira spp.) and ribbon-forming pennate species (Fragilariopsis spp./Fossula arctica). The bloom remained concentrated over the shallow Greenland shelf and slope, in Atlantic-influenced waters, and weakened as it moved westwards toward ice-free Pacific-influenced waters. The development resulted in a near depletion of all nutrients eastwards of the bay, which probably induced the formation of resting spores of Melosira arctica. In contrast, under the ice pack, nutrients had not yet been consumed. Biogenic silica and uptake rates were still low (respectively <0.5 mu mol L-1 and <0.05 mu mol L-1 d(-1)), although elevated specific Si uptake rates (up to 0.23 d(-1)) probably reflected early stages of the bloom. These diatoms were dominated by pennate species (Pseudo-nitzschia spp., Ceratoneis closterium, and Fragilariopsis spp./Fossula arctica). This study can contribute to predictions of the future response of Arctic diatoms in the context of climate change. |
format |
Article in Journal/Newspaper |
author |
Lafond, Augustin Leblanc, Karine Queguiner, Bernard Moriceau, Brivaela Leynaert, Aude Cornet, Veronique Legras, Justine Ras, Josephine Parenteau, Marie Garcia, Nicole Babin, Marcel Tremblay, Jean-eric |
author_facet |
Lafond, Augustin Leblanc, Karine Queguiner, Bernard Moriceau, Brivaela Leynaert, Aude Cornet, Veronique Legras, Justine Ras, Josephine Parenteau, Marie Garcia, Nicole Babin, Marcel Tremblay, Jean-eric |
author_sort |
Lafond, Augustin |
title |
Late spring bloom development of pelagic diatoms in Baffin Bay |
title_short |
Late spring bloom development of pelagic diatoms in Baffin Bay |
title_full |
Late spring bloom development of pelagic diatoms in Baffin Bay |
title_fullStr |
Late spring bloom development of pelagic diatoms in Baffin Bay |
title_full_unstemmed |
Late spring bloom development of pelagic diatoms in Baffin Bay |
title_sort |
late spring bloom development of pelagic diatoms in baffin bay |
publisher |
Univ California Press |
publishDate |
2019 |
url |
https://archimer.ifremer.fr/doc/00615/72752/72021.pdf https://archimer.ifremer.fr/doc/00615/72752/72022.pdf https://doi.org/10.1525/elementa.382 https://archimer.ifremer.fr/doc/00615/72752/ |
geographic |
Arctic Arctic Ocean Baffin Bay Greenland Pacific |
geographic_facet |
Arctic Arctic Ocean Baffin Bay Greenland Pacific |
genre |
Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Climate change Greenland ice pack Phytoplankton Sea ice |
genre_facet |
Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Climate change Greenland ice pack Phytoplankton Sea ice |
op_source |
Elementa-science Of The Anthropocene (2325-1026) (Univ California Press), 2019-11 , Vol. 7 , N. 44 , P. 24p. |
op_relation |
https://archimer.ifremer.fr/doc/00615/72752/72021.pdf https://archimer.ifremer.fr/doc/00615/72752/72022.pdf doi:10.1525/elementa.382 https://archimer.ifremer.fr/doc/00615/72752/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1525/elementa.382 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
7 |
_version_ |
1766328812086231040 |