Two versions of short-term phytoplankton ecophysiology and taxonomic assemblages in the Arctic Ocean’s North Water (Canada, Greenland)
International audience Abstract Photosynthetic performance in open marine waters is determined by how well phytoplankton species are adapted to their immediate environment and available light. Although there is light for 24 h a day during the Arctic summer, little is known about short-term (h) tempo...
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Online Access: | https://hal.archives-ouvertes.fr/hal-03458238 https://doi.org/10.1093/plankt/fbab009 |
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ftccsdartic:oai:HAL:hal-03458238v1 2023-05-15T14:48:08+02:00 Two versions of short-term phytoplankton ecophysiology and taxonomic assemblages in the Arctic Ocean’s North Water (Canada, Greenland) Joli, Nathalie Lacour, Thomas Freyria, Nastasia Royer, Sarah-Jeanne Babin, Marcel Lovejoy, Connie Takuvik Joint International Laboratory ULAVAL-CNRS Université Laval Québec (ULaval)-Centre National de la Recherche Scientifique (CNRS) 2021-03-30 https://hal.archives-ouvertes.fr/hal-03458238 https://doi.org/10.1093/plankt/fbab009 en eng HAL CCSD Oxford University Press (OUP) info:eu-repo/semantics/altIdentifier/doi/10.1093/plankt/fbab009 hal-03458238 https://hal.archives-ouvertes.fr/hal-03458238 doi:10.1093/plankt/fbab009 ISSN: 0142-7873 EISSN: 1464-3774 Journal of Plankton Research https://hal.archives-ouvertes.fr/hal-03458238 Journal of Plankton Research, Oxford University Press (OUP), 2021, 43 (2), pp.126-141. ⟨10.1093/plankt/fbab009⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2021 ftccsdartic https://doi.org/10.1093/plankt/fbab009 2021-12-04T23:25:34Z International audience Abstract Photosynthetic performance in open marine waters is determined by how well phytoplankton species are adapted to their immediate environment and available light. Although there is light for 24 h a day during the Arctic summer, little is known about short-term (h) temporal variability of phytoplankton photosynthetic performance in Arctic waters. To address this, we sampled the North Water (76.5°N) every 4 h over 24 h at two stations on the East and West sides that are influenced by different water masses and current conditions. We specifically investigated phytoplankton pigments, the xanthophyll cycle (XC), which is an indication of photoprotective capacity, and photosynthesis–irradiance (PE) response curves, at the surface and 20 m depth. The photophysiological parameters on the two sides differed along with the taxonomic signal derived from accessory pigments. On both sides, surface XC pigments showed high photoprotection capacity with the dinodinoxanthin–diatoxanthin (DD) and the violaxanthin, antheraxanthin and zeaxanthin cycles correlated with incoming radiation. The PE results showed that communities dominated by small flagellates on the western side performed better compared to diatom dominated communities on the eastern side. We conclude that phytoplankton and photosynthetic capacity differed consistent with known hydrography, with implications for a changing Arctic. Article in Journal/Newspaper Arctic Greenland Phytoplankton Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Canada Greenland Journal of Plankton Research 43 2 126 141 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Joli, Nathalie Lacour, Thomas Freyria, Nastasia Royer, Sarah-Jeanne Babin, Marcel Lovejoy, Connie Two versions of short-term phytoplankton ecophysiology and taxonomic assemblages in the Arctic Ocean’s North Water (Canada, Greenland) |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Abstract Photosynthetic performance in open marine waters is determined by how well phytoplankton species are adapted to their immediate environment and available light. Although there is light for 24 h a day during the Arctic summer, little is known about short-term (h) temporal variability of phytoplankton photosynthetic performance in Arctic waters. To address this, we sampled the North Water (76.5°N) every 4 h over 24 h at two stations on the East and West sides that are influenced by different water masses and current conditions. We specifically investigated phytoplankton pigments, the xanthophyll cycle (XC), which is an indication of photoprotective capacity, and photosynthesis–irradiance (PE) response curves, at the surface and 20 m depth. The photophysiological parameters on the two sides differed along with the taxonomic signal derived from accessory pigments. On both sides, surface XC pigments showed high photoprotection capacity with the dinodinoxanthin–diatoxanthin (DD) and the violaxanthin, antheraxanthin and zeaxanthin cycles correlated with incoming radiation. The PE results showed that communities dominated by small flagellates on the western side performed better compared to diatom dominated communities on the eastern side. We conclude that phytoplankton and photosynthetic capacity differed consistent with known hydrography, with implications for a changing Arctic. |
author2 |
Takuvik Joint International Laboratory ULAVAL-CNRS Université Laval Québec (ULaval)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Joli, Nathalie Lacour, Thomas Freyria, Nastasia Royer, Sarah-Jeanne Babin, Marcel Lovejoy, Connie |
author_facet |
Joli, Nathalie Lacour, Thomas Freyria, Nastasia Royer, Sarah-Jeanne Babin, Marcel Lovejoy, Connie |
author_sort |
Joli, Nathalie |
title |
Two versions of short-term phytoplankton ecophysiology and taxonomic assemblages in the Arctic Ocean’s North Water (Canada, Greenland) |
title_short |
Two versions of short-term phytoplankton ecophysiology and taxonomic assemblages in the Arctic Ocean’s North Water (Canada, Greenland) |
title_full |
Two versions of short-term phytoplankton ecophysiology and taxonomic assemblages in the Arctic Ocean’s North Water (Canada, Greenland) |
title_fullStr |
Two versions of short-term phytoplankton ecophysiology and taxonomic assemblages in the Arctic Ocean’s North Water (Canada, Greenland) |
title_full_unstemmed |
Two versions of short-term phytoplankton ecophysiology and taxonomic assemblages in the Arctic Ocean’s North Water (Canada, Greenland) |
title_sort |
two versions of short-term phytoplankton ecophysiology and taxonomic assemblages in the arctic ocean’s north water (canada, greenland) |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.archives-ouvertes.fr/hal-03458238 https://doi.org/10.1093/plankt/fbab009 |
geographic |
Arctic Canada Greenland |
geographic_facet |
Arctic Canada Greenland |
genre |
Arctic Greenland Phytoplankton |
genre_facet |
Arctic Greenland Phytoplankton |
op_source |
ISSN: 0142-7873 EISSN: 1464-3774 Journal of Plankton Research https://hal.archives-ouvertes.fr/hal-03458238 Journal of Plankton Research, Oxford University Press (OUP), 2021, 43 (2), pp.126-141. ⟨10.1093/plankt/fbab009⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1093/plankt/fbab009 hal-03458238 https://hal.archives-ouvertes.fr/hal-03458238 doi:10.1093/plankt/fbab009 |
op_doi |
https://doi.org/10.1093/plankt/fbab009 |
container_title |
Journal of Plankton Research |
container_volume |
43 |
container_issue |
2 |
container_start_page |
126 |
op_container_end_page |
141 |
_version_ |
1766319221444182016 |