The coccolithophores Emiliania huxleyi and Coccolithus pelagicus: Extant populations from the Norwegian–Iceland Seas and Fram Strait
International audience The distributions of the coccolithophore species Emiliania huxleyi and Coccolithus pelagicus (heterococcolith-bearing phase) in the northern North Atlantic were investigated along two zonal transects crossing Fram Strait and the Norwegian–Iceland Sea, respectively, each conduc...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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Format: | Article in Journal/Newspaper |
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ftinsu:oai:HAL:hal-02128690v1 2023-06-18T03:39:39+02:00 The coccolithophores Emiliania huxleyi and Coccolithus pelagicus: Extant populations from the Norwegian–Iceland Seas and Fram Strait Dylmer, C. V. Giraudeau, J. Hanquiez, V. Husum, K. Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) University of Tromsø (UiT) 2015 https://hal.science/hal-02128690 https://doi.org/10.1016/j.dsr.2014.11.012 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr.2014.11.012 hal-02128690 https://hal.science/hal-02128690 doi:10.1016/j.dsr.2014.11.012 ISSN: 0967-0637 Deep Sea Research Part I: Oceanographic Research Papers https://hal.science/hal-02128690 Deep Sea Research Part I: Oceanographic Research Papers, 2015, 98, pp.1-9. ⟨10.1016/j.dsr.2014.11.012⟩ Coccolithophores Nordic Seas Fram Strait Water masses Seasonality [SDE.MCG]Environmental Sciences/Global Changes [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2015 ftinsu https://doi.org/10.1016/j.dsr.2014.11.012 2023-06-05T23:51:25Z International audience The distributions of the coccolithophore species Emiliania huxleyi and Coccolithus pelagicus (heterococcolith-bearing phase) in the northern North Atlantic were investigated along two zonal transects crossing Fram Strait and the Norwegian–Iceland Sea, respectively, each conducted during both July 2011 and September–October 2007. Remote-sensing images as well as CTD and ARGO profiles were used to constrain the physico-chemical state of the surface water and surface mixed layer at the time of sampling. Strong seasonal differences in bulk coccolithophore standing stocks characterized the northern and southern transects, where the maximum values of 53×103 cells/l (fall) and 70×103 cells/l (summer), respectively, were essentially explained by E. huxleyi. This pattern confirms previous findings of a summer to fall northwestward shift in peak coccolithophore cell densities within the Nordic Seas. While depicting an overall zonal shift in high cell densities between the summer (Norwegian Sea) and fall (northern Iceland Sea) conditions, the southern transects were additionally characterized by local peak coccolithophore concentrations associated with a geographically and temporally restricted convective process (Lofoten Gyre, summer), as well as an island mass effect (in the vicinity of Jan Mayen Island, fall).Maximum coccolithophore abundances within Fram Strait were found during both seasons close to the western frontal zone (Polar and Arctic Fronts) an area of strong density gradients where physical and chemical properties of the surface mixed layer are prone to enhance phytoplankton biomass and productivity. Here, changes in species dominance from E. huxleyi in summer, to C. pelagicus in fall, were related to the strengthened influence during summer, of surface AW, as well as to high July solar irradiance, within an area usually characterized by C. pelagicus-dominated low density populations. Article in Journal/Newspaper Arctic Fram Strait Iceland Jan Mayen Jan Mayen Island Lofoten Nordic Seas North Atlantic Norwegian Sea Phytoplankton Institut national des sciences de l'Univers: HAL-INSU Arctic Jan Mayen Lofoten Norwegian Sea Deep Sea Research Part I: Oceanographic Research Papers 98 1 9 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Coccolithophores Nordic Seas Fram Strait Water masses Seasonality [SDE.MCG]Environmental Sciences/Global Changes [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
Coccolithophores Nordic Seas Fram Strait Water masses Seasonality [SDE.MCG]Environmental Sciences/Global Changes [SDE.BE]Environmental Sciences/Biodiversity and Ecology Dylmer, C. V. Giraudeau, J. Hanquiez, V. Husum, K. The coccolithophores Emiliania huxleyi and Coccolithus pelagicus: Extant populations from the Norwegian–Iceland Seas and Fram Strait |
topic_facet |
Coccolithophores Nordic Seas Fram Strait Water masses Seasonality [SDE.MCG]Environmental Sciences/Global Changes [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
International audience The distributions of the coccolithophore species Emiliania huxleyi and Coccolithus pelagicus (heterococcolith-bearing phase) in the northern North Atlantic were investigated along two zonal transects crossing Fram Strait and the Norwegian–Iceland Sea, respectively, each conducted during both July 2011 and September–October 2007. Remote-sensing images as well as CTD and ARGO profiles were used to constrain the physico-chemical state of the surface water and surface mixed layer at the time of sampling. Strong seasonal differences in bulk coccolithophore standing stocks characterized the northern and southern transects, where the maximum values of 53×103 cells/l (fall) and 70×103 cells/l (summer), respectively, were essentially explained by E. huxleyi. This pattern confirms previous findings of a summer to fall northwestward shift in peak coccolithophore cell densities within the Nordic Seas. While depicting an overall zonal shift in high cell densities between the summer (Norwegian Sea) and fall (northern Iceland Sea) conditions, the southern transects were additionally characterized by local peak coccolithophore concentrations associated with a geographically and temporally restricted convective process (Lofoten Gyre, summer), as well as an island mass effect (in the vicinity of Jan Mayen Island, fall).Maximum coccolithophore abundances within Fram Strait were found during both seasons close to the western frontal zone (Polar and Arctic Fronts) an area of strong density gradients where physical and chemical properties of the surface mixed layer are prone to enhance phytoplankton biomass and productivity. Here, changes in species dominance from E. huxleyi in summer, to C. pelagicus in fall, were related to the strengthened influence during summer, of surface AW, as well as to high July solar irradiance, within an area usually characterized by C. pelagicus-dominated low density populations. |
author2 |
Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) University of Tromsø (UiT) |
format |
Article in Journal/Newspaper |
author |
Dylmer, C. V. Giraudeau, J. Hanquiez, V. Husum, K. |
author_facet |
Dylmer, C. V. Giraudeau, J. Hanquiez, V. Husum, K. |
author_sort |
Dylmer, C. V. |
title |
The coccolithophores Emiliania huxleyi and Coccolithus pelagicus: Extant populations from the Norwegian–Iceland Seas and Fram Strait |
title_short |
The coccolithophores Emiliania huxleyi and Coccolithus pelagicus: Extant populations from the Norwegian–Iceland Seas and Fram Strait |
title_full |
The coccolithophores Emiliania huxleyi and Coccolithus pelagicus: Extant populations from the Norwegian–Iceland Seas and Fram Strait |
title_fullStr |
The coccolithophores Emiliania huxleyi and Coccolithus pelagicus: Extant populations from the Norwegian–Iceland Seas and Fram Strait |
title_full_unstemmed |
The coccolithophores Emiliania huxleyi and Coccolithus pelagicus: Extant populations from the Norwegian–Iceland Seas and Fram Strait |
title_sort |
coccolithophores emiliania huxleyi and coccolithus pelagicus: extant populations from the norwegian–iceland seas and fram strait |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-02128690 https://doi.org/10.1016/j.dsr.2014.11.012 |
geographic |
Arctic Jan Mayen Lofoten Norwegian Sea |
geographic_facet |
Arctic Jan Mayen Lofoten Norwegian Sea |
genre |
Arctic Fram Strait Iceland Jan Mayen Jan Mayen Island Lofoten Nordic Seas North Atlantic Norwegian Sea Phytoplankton |
genre_facet |
Arctic Fram Strait Iceland Jan Mayen Jan Mayen Island Lofoten Nordic Seas North Atlantic Norwegian Sea Phytoplankton |
op_source |
ISSN: 0967-0637 Deep Sea Research Part I: Oceanographic Research Papers https://hal.science/hal-02128690 Deep Sea Research Part I: Oceanographic Research Papers, 2015, 98, pp.1-9. ⟨10.1016/j.dsr.2014.11.012⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr.2014.11.012 hal-02128690 https://hal.science/hal-02128690 doi:10.1016/j.dsr.2014.11.012 |
op_doi |
https://doi.org/10.1016/j.dsr.2014.11.012 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
98 |
container_start_page |
1 |
op_container_end_page |
9 |
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1769004369285480448 |