Submesoscale ocean fronts act as biological hotspot for southern elephant seal
International audience The area west of the Kerguelen Islands (20–70°E/45–60°S) is characterized by a weak mesoscale activity except for a standing meander region of the Antarctic Circumpolar Current (ACC) localized between 20 and 40°E. A unique bio-physical dataset at high-resolution collected by a...
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ftunivbrest:oai:HAL:hal-02874962v1 2024-02-11T09:56:20+01:00 Submesoscale ocean fronts act as biological hotspot for southern elephant seal Siegelman, Lia O’toole, Malcolm Flexas, Mar Rivière, Pascal Klein, Patrice Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Jet Propulsion Laboratory (JPL) NASA-California Institute of Technology (CALTECH) Department of Environmental Science and Engineering Pasadena (ESE) California Institute of Technology (CALTECH) The UWA Oceans Institute ANR-10-LABX-0019,LabexMER,LabexMER Marine Excellence Research: a changing ocean(2010) 2019 https://hal.science/hal-02874962 https://hal.science/hal-02874962/document https://hal.science/hal-02874962/file/Siegelman_etal_SR_2019.pdf https://doi.org/10.1038/s41598-019-42117-w en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-019-42117-w hal-02874962 https://hal.science/hal-02874962 https://hal.science/hal-02874962/document https://hal.science/hal-02874962/file/Siegelman_etal_SR_2019.pdf doi:10.1038/s41598-019-42117-w info:eu-repo/semantics/OpenAccess ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://hal.science/hal-02874962 Scientific Reports, 2019, 9, pp.5588. ⟨10.1038/s41598-019-42117-w⟩ ACL ANTARCTIC CIRCUMPOLAR CURRENT AREA-RESTRICTED SEARCH FORAGING BEHAVIOR MIROUNGA-LEONINA MESOSCALE PREDATOR VARIABILITY TURBULENCE FEATURES PASSAGE [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2019 ftunivbrest https://doi.org/10.1038/s41598-019-42117-w 2024-01-23T23:39:43Z International audience The area west of the Kerguelen Islands (20–70°E/45–60°S) is characterized by a weak mesoscale activity except for a standing meander region of the Antarctic Circumpolar Current (ACC) localized between 20 and 40°E. A unique bio-physical dataset at high-resolution collected by a southern elephant seal (Mirounga leonina) reveals a conspicuous increase in foraging activity at the standing meander site up to 5 times larger than during the rest of her three-month trip west of the Kerguelen Islands. Here, we propose a physical explanation for such high biological activity based on the study of small-scale fronts with scales of 5 to 20 km, also called submesoscales. The standing meander is associated with intensified frontal dynamics at submesoscale, not observed in the rest of the region. Results shed new light on the spatial distribution of submesoscale fronts in the under-sampled area west of the Kerguelen plateau and emphasize their importance for upper trophic levels. Despite that most elephant seals target foraging grounds east of the Kerguelen Plateau, our findings suggest that excursions to the west are not accidental, and may be explained by the recurrently elevated physical and biological activity of the site. As such, other standing meanders of the ACC may also act as biological hotspots where trophic interactions are stimulated by submesoscale turbulence. Article in Journal/Newspaper Antarc* Antarctic Elephant Seal Elephant Seals Kerguelen Islands Mirounga leonina Southern Elephant Seal Université de Bretagne Occidentale: HAL Antarctic The Antarctic Kerguelen Kerguelen Islands Scientific Reports 9 1 |
institution |
Open Polar |
collection |
Université de Bretagne Occidentale: HAL |
op_collection_id |
ftunivbrest |
language |
English |
topic |
ACL ANTARCTIC CIRCUMPOLAR CURRENT AREA-RESTRICTED SEARCH FORAGING BEHAVIOR MIROUNGA-LEONINA MESOSCALE PREDATOR VARIABILITY TURBULENCE FEATURES PASSAGE [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
ACL ANTARCTIC CIRCUMPOLAR CURRENT AREA-RESTRICTED SEARCH FORAGING BEHAVIOR MIROUNGA-LEONINA MESOSCALE PREDATOR VARIABILITY TURBULENCE FEATURES PASSAGE [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Siegelman, Lia O’toole, Malcolm Flexas, Mar Rivière, Pascal Klein, Patrice Submesoscale ocean fronts act as biological hotspot for southern elephant seal |
topic_facet |
ACL ANTARCTIC CIRCUMPOLAR CURRENT AREA-RESTRICTED SEARCH FORAGING BEHAVIOR MIROUNGA-LEONINA MESOSCALE PREDATOR VARIABILITY TURBULENCE FEATURES PASSAGE [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience The area west of the Kerguelen Islands (20–70°E/45–60°S) is characterized by a weak mesoscale activity except for a standing meander region of the Antarctic Circumpolar Current (ACC) localized between 20 and 40°E. A unique bio-physical dataset at high-resolution collected by a southern elephant seal (Mirounga leonina) reveals a conspicuous increase in foraging activity at the standing meander site up to 5 times larger than during the rest of her three-month trip west of the Kerguelen Islands. Here, we propose a physical explanation for such high biological activity based on the study of small-scale fronts with scales of 5 to 20 km, also called submesoscales. The standing meander is associated with intensified frontal dynamics at submesoscale, not observed in the rest of the region. Results shed new light on the spatial distribution of submesoscale fronts in the under-sampled area west of the Kerguelen plateau and emphasize their importance for upper trophic levels. Despite that most elephant seals target foraging grounds east of the Kerguelen Plateau, our findings suggest that excursions to the west are not accidental, and may be explained by the recurrently elevated physical and biological activity of the site. As such, other standing meanders of the ACC may also act as biological hotspots where trophic interactions are stimulated by submesoscale turbulence. |
author2 |
Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Jet Propulsion Laboratory (JPL) NASA-California Institute of Technology (CALTECH) Department of Environmental Science and Engineering Pasadena (ESE) California Institute of Technology (CALTECH) The UWA Oceans Institute ANR-10-LABX-0019,LabexMER,LabexMER Marine Excellence Research: a changing ocean(2010) |
format |
Article in Journal/Newspaper |
author |
Siegelman, Lia O’toole, Malcolm Flexas, Mar Rivière, Pascal Klein, Patrice |
author_facet |
Siegelman, Lia O’toole, Malcolm Flexas, Mar Rivière, Pascal Klein, Patrice |
author_sort |
Siegelman, Lia |
title |
Submesoscale ocean fronts act as biological hotspot for southern elephant seal |
title_short |
Submesoscale ocean fronts act as biological hotspot for southern elephant seal |
title_full |
Submesoscale ocean fronts act as biological hotspot for southern elephant seal |
title_fullStr |
Submesoscale ocean fronts act as biological hotspot for southern elephant seal |
title_full_unstemmed |
Submesoscale ocean fronts act as biological hotspot for southern elephant seal |
title_sort |
submesoscale ocean fronts act as biological hotspot for southern elephant seal |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-02874962 https://hal.science/hal-02874962/document https://hal.science/hal-02874962/file/Siegelman_etal_SR_2019.pdf https://doi.org/10.1038/s41598-019-42117-w |
geographic |
Antarctic The Antarctic Kerguelen Kerguelen Islands |
geographic_facet |
Antarctic The Antarctic Kerguelen Kerguelen Islands |
genre |
Antarc* Antarctic Elephant Seal Elephant Seals Kerguelen Islands Mirounga leonina Southern Elephant Seal |
genre_facet |
Antarc* Antarctic Elephant Seal Elephant Seals Kerguelen Islands Mirounga leonina Southern Elephant Seal |
op_source |
ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://hal.science/hal-02874962 Scientific Reports, 2019, 9, pp.5588. ⟨10.1038/s41598-019-42117-w⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-019-42117-w hal-02874962 https://hal.science/hal-02874962 https://hal.science/hal-02874962/document https://hal.science/hal-02874962/file/Siegelman_etal_SR_2019.pdf doi:10.1038/s41598-019-42117-w |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/s41598-019-42117-w |
container_title |
Scientific Reports |
container_volume |
9 |
container_issue |
1 |
_version_ |
1790602338910601216 |