Antarctic Seabed Assemblages in an Ice-Shelf-Adjacent Polynya, Western Weddell Sea
International audience Ice shelves cover ~1.6 million km2 of the Antarctic continental shelf and are sensitive indicators of climate change. With ice-shelf retreat, aphotic marine environments transform into new open-water spaces of photo-induced primary production and associated organic matter expo...
Published in: | Biology |
---|---|
Main Authors: | , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2022
|
Subjects: | |
Online Access: | https://hal.science/hal-03998622 https://hal.science/hal-03998622/document https://hal.science/hal-03998622/file/biology-11-01705-v3.pdf https://doi.org/10.3390/biology11121705 |
id |
ftepunivpsaclay:oai:HAL:hal-03998622v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
École Polytechnique, Université Paris-Saclay: HAL |
op_collection_id |
ftepunivpsaclay |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Frinault, Bétina Christie, Frazer Fawcett, Sarah Flynn, Raquel Hutchinson, Katherine Montes Strevens, Chloë Taylor, Michelle Woodall, Lucy Barnes, David Antarctic Seabed Assemblages in an Ice-Shelf-Adjacent Polynya, Western Weddell Sea |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Ice shelves cover ~1.6 million km2 of the Antarctic continental shelf and are sensitive indicators of climate change. With ice-shelf retreat, aphotic marine environments transform into new open-water spaces of photo-induced primary production and associated organic matter export to the benthos. Predicting how Antarctic seafloor assemblages may develop following ice-shelf loss requires knowledge of assemblages bordering the ice-shelf margins, which are relatively undocumented. This study investigated seafloor assemblages, by taxa and functional groups, in a coastal polynya adjacent to the Larsen C Ice Shelf front, western Weddell Sea. The study area is rarely accessed, at the frontline of climate change, and located within a CCAMLR-proposed international marine protected area. Four sites, ~1 to 16 km from the ice-shelf front, were explored for megabenthic assemblages, and potential environmental drivers of assemblage structures were assessed. Faunal density increased with distance from the ice shelf, with epifaunal deposit-feeders a surrogate for overall density trends. Faunal richness did not exhibit a significant pattern with distance from the ice shelf and was most variable at sites closest to the ice-shelf front. Faunal assemblages significantly differed in composition among sites, and those nearest to the ice shelf were the most dissimilar; however, ice-shelf proximity did not emerge as a significant driver of assemblage structure. Overall, the study found a biologically-diverse and complex seafloor environment close to an ice-shelf front and provides ecological baselines for monitoring benthic ecosystem responses to environmental change, supporting marine management. |
author2 |
School of Geography and the Environment Oxford (SoGE) University of Oxford Scott Polar Research Institute University of Cambridge UK (CAM) Department of Oceanography Cape Town University of Cape Town Marine and Antarctic Research Center for Innovation and Sustainability (MARIS) Nucleus for European Modeling of the Ocean (NEMO R&D ) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) School of life sciences University of Essex British Antarctic Survey (BAS) Natural Environment Research Council (NERC) |
format |
Article in Journal/Newspaper |
author |
Frinault, Bétina Christie, Frazer Fawcett, Sarah Flynn, Raquel Hutchinson, Katherine Montes Strevens, Chloë Taylor, Michelle Woodall, Lucy Barnes, David |
author_facet |
Frinault, Bétina Christie, Frazer Fawcett, Sarah Flynn, Raquel Hutchinson, Katherine Montes Strevens, Chloë Taylor, Michelle Woodall, Lucy Barnes, David |
author_sort |
Frinault, Bétina |
title |
Antarctic Seabed Assemblages in an Ice-Shelf-Adjacent Polynya, Western Weddell Sea |
title_short |
Antarctic Seabed Assemblages in an Ice-Shelf-Adjacent Polynya, Western Weddell Sea |
title_full |
Antarctic Seabed Assemblages in an Ice-Shelf-Adjacent Polynya, Western Weddell Sea |
title_fullStr |
Antarctic Seabed Assemblages in an Ice-Shelf-Adjacent Polynya, Western Weddell Sea |
title_full_unstemmed |
Antarctic Seabed Assemblages in an Ice-Shelf-Adjacent Polynya, Western Weddell Sea |
title_sort |
antarctic seabed assemblages in an ice-shelf-adjacent polynya, western weddell sea |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-03998622 https://hal.science/hal-03998622/document https://hal.science/hal-03998622/file/biology-11-01705-v3.pdf https://doi.org/10.3390/biology11121705 |
genre |
Antarc* Antarctic Ice Shelf Ice Shelves Weddell Sea |
genre_facet |
Antarc* Antarctic Ice Shelf Ice Shelves Weddell Sea |
op_source |
ISSN: 2079-7737 Biology https://hal.science/hal-03998622 Biology, 2022, 11 (12), pp.1705. ⟨10.3390/biology11121705⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3390/biology11121705 hal-03998622 https://hal.science/hal-03998622 https://hal.science/hal-03998622/document https://hal.science/hal-03998622/file/biology-11-01705-v3.pdf doi:10.3390/biology11121705 WOS: 000900558200001 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3390/biology11121705 |
container_title |
Biology |
container_volume |
11 |
container_issue |
12 |
container_start_page |
1705 |
_version_ |
1799480463550578688 |
spelling |
ftepunivpsaclay:oai:HAL:hal-03998622v1 2024-05-19T07:29:38+00:00 Antarctic Seabed Assemblages in an Ice-Shelf-Adjacent Polynya, Western Weddell Sea Frinault, Bétina Christie, Frazer Fawcett, Sarah Flynn, Raquel Hutchinson, Katherine Montes Strevens, Chloë Taylor, Michelle Woodall, Lucy Barnes, David School of Geography and the Environment Oxford (SoGE) University of Oxford Scott Polar Research Institute University of Cambridge UK (CAM) Department of Oceanography Cape Town University of Cape Town Marine and Antarctic Research Center for Innovation and Sustainability (MARIS) Nucleus for European Modeling of the Ocean (NEMO R&D ) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) School of life sciences University of Essex British Antarctic Survey (BAS) Natural Environment Research Council (NERC) 2022-12 https://hal.science/hal-03998622 https://hal.science/hal-03998622/document https://hal.science/hal-03998622/file/biology-11-01705-v3.pdf https://doi.org/10.3390/biology11121705 en eng HAL CCSD MDPI info:eu-repo/semantics/altIdentifier/doi/10.3390/biology11121705 hal-03998622 https://hal.science/hal-03998622 https://hal.science/hal-03998622/document https://hal.science/hal-03998622/file/biology-11-01705-v3.pdf doi:10.3390/biology11121705 WOS: 000900558200001 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2079-7737 Biology https://hal.science/hal-03998622 Biology, 2022, 11 (12), pp.1705. ⟨10.3390/biology11121705⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2022 ftepunivpsaclay https://doi.org/10.3390/biology11121705 2024-04-25T00:35:14Z International audience Ice shelves cover ~1.6 million km2 of the Antarctic continental shelf and are sensitive indicators of climate change. With ice-shelf retreat, aphotic marine environments transform into new open-water spaces of photo-induced primary production and associated organic matter export to the benthos. Predicting how Antarctic seafloor assemblages may develop following ice-shelf loss requires knowledge of assemblages bordering the ice-shelf margins, which are relatively undocumented. This study investigated seafloor assemblages, by taxa and functional groups, in a coastal polynya adjacent to the Larsen C Ice Shelf front, western Weddell Sea. The study area is rarely accessed, at the frontline of climate change, and located within a CCAMLR-proposed international marine protected area. Four sites, ~1 to 16 km from the ice-shelf front, were explored for megabenthic assemblages, and potential environmental drivers of assemblage structures were assessed. Faunal density increased with distance from the ice shelf, with epifaunal deposit-feeders a surrogate for overall density trends. Faunal richness did not exhibit a significant pattern with distance from the ice shelf and was most variable at sites closest to the ice-shelf front. Faunal assemblages significantly differed in composition among sites, and those nearest to the ice shelf were the most dissimilar; however, ice-shelf proximity did not emerge as a significant driver of assemblage structure. Overall, the study found a biologically-diverse and complex seafloor environment close to an ice-shelf front and provides ecological baselines for monitoring benthic ecosystem responses to environmental change, supporting marine management. Article in Journal/Newspaper Antarc* Antarctic Ice Shelf Ice Shelves Weddell Sea École Polytechnique, Université Paris-Saclay: HAL Biology 11 12 1705 |