Habitat and trophic ecology of Southern Ocean cephalopods from stable isotope analyses
International audience Although cephalopods play a critical role in marine food webs both as predators andprey, there is a limited knowledge of several basic aspects of their ecology, including their habitatand trophic level, in the Southern Ocean. We examined the ecological role of several Southern...
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Online Access: | https://hal.archives-ouvertes.fr/hal-01212859 https://doi.org/10.3354/meps11266 |
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ftunivnantes:oai:HAL:hal-01212859v1 2023-05-15T13:44:28+02:00 Habitat and trophic ecology of Southern Ocean cephalopods from stable isotope analyses Guerreiro, Miguel Phillips, Richard A. Cherel, Yves Ceia, Filipe R. Alvito, Pedro Rosa, Rui Xavier, José C. Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) 2015 https://hal.archives-ouvertes.fr/hal-01212859 https://doi.org/10.3354/meps11266 en eng HAL CCSD Inter Research info:eu-repo/semantics/altIdentifier/doi/10.3354/meps11266 hal-01212859 https://hal.archives-ouvertes.fr/hal-01212859 doi:10.3354/meps11266 ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.archives-ouvertes.fr/hal-01212859 Marine Ecology Progress Series, 2015, ⟨10.3354/meps11266⟩ Southern Ocean Pelagic ecosystem Distribution Foraging ecology Kondakovia longimana Diet [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2015 ftunivnantes https://doi.org/10.3354/meps11266 2023-01-04T00:07:41Z International audience Although cephalopods play a critical role in marine food webs both as predators andprey, there is a limited knowledge of several basic aspects of their ecology, including their habitatand trophic level, in the Southern Ocean. We examined the ecological role of several SouthernOcean cephalopod species by analyzing δ13C and δ15N values in lower cephalopod beaks obtainedfrom diet samples of wandering albatross Diomedea exulans from South Georgia (AtlanticOcean), and from Crozet and Kerguelen Islands (Indian Ocean). Beak δ13C values ranged from−25.7 to −17.9‰, and were used to assign different cephalopod species to the subtropical, sub-Antarctic or Antarctic Zones. Beak δ15N values were more variable among species, ranging from2.4 to 13.3‰, a difference of ~11‰ that represents approx. 3 trophic levels. Differences amongislands in isotope ratios in the same cephalopod species (higher δ15N and lower δ13C values inSouth Georgia) were attributed to regional oceanographic processes. Antarctic cephalopodsoccupy niches similar to those found in some pelagic fish, seabirds and marine mammals. Ascephalopods are key components in Southern Ocean food webs, these results greatly advance ourunderstanding of the structure, energy and carbon flows in this polar ecosystem. Article in Journal/Newspaper Antarc* Antarctic Diomedea exulans Kerguelen Islands Southern Ocean Wandering Albatross Université de Nantes: HAL-UNIV-NANTES Antarctic Indian Kerguelen Kerguelen Islands Southern Ocean Marine Ecology Progress Series 530 119 134 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Southern Ocean Pelagic ecosystem Distribution Foraging ecology Kondakovia longimana Diet [SDE]Environmental Sciences |
spellingShingle |
Southern Ocean Pelagic ecosystem Distribution Foraging ecology Kondakovia longimana Diet [SDE]Environmental Sciences Guerreiro, Miguel Phillips, Richard A. Cherel, Yves Ceia, Filipe R. Alvito, Pedro Rosa, Rui Xavier, José C. Habitat and trophic ecology of Southern Ocean cephalopods from stable isotope analyses |
topic_facet |
Southern Ocean Pelagic ecosystem Distribution Foraging ecology Kondakovia longimana Diet [SDE]Environmental Sciences |
description |
International audience Although cephalopods play a critical role in marine food webs both as predators andprey, there is a limited knowledge of several basic aspects of their ecology, including their habitatand trophic level, in the Southern Ocean. We examined the ecological role of several SouthernOcean cephalopod species by analyzing δ13C and δ15N values in lower cephalopod beaks obtainedfrom diet samples of wandering albatross Diomedea exulans from South Georgia (AtlanticOcean), and from Crozet and Kerguelen Islands (Indian Ocean). Beak δ13C values ranged from−25.7 to −17.9‰, and were used to assign different cephalopod species to the subtropical, sub-Antarctic or Antarctic Zones. Beak δ15N values were more variable among species, ranging from2.4 to 13.3‰, a difference of ~11‰ that represents approx. 3 trophic levels. Differences amongislands in isotope ratios in the same cephalopod species (higher δ15N and lower δ13C values inSouth Georgia) were attributed to regional oceanographic processes. Antarctic cephalopodsoccupy niches similar to those found in some pelagic fish, seabirds and marine mammals. Ascephalopods are key components in Southern Ocean food webs, these results greatly advance ourunderstanding of the structure, energy and carbon flows in this polar ecosystem. |
author2 |
Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) |
format |
Article in Journal/Newspaper |
author |
Guerreiro, Miguel Phillips, Richard A. Cherel, Yves Ceia, Filipe R. Alvito, Pedro Rosa, Rui Xavier, José C. |
author_facet |
Guerreiro, Miguel Phillips, Richard A. Cherel, Yves Ceia, Filipe R. Alvito, Pedro Rosa, Rui Xavier, José C. |
author_sort |
Guerreiro, Miguel |
title |
Habitat and trophic ecology of Southern Ocean cephalopods from stable isotope analyses |
title_short |
Habitat and trophic ecology of Southern Ocean cephalopods from stable isotope analyses |
title_full |
Habitat and trophic ecology of Southern Ocean cephalopods from stable isotope analyses |
title_fullStr |
Habitat and trophic ecology of Southern Ocean cephalopods from stable isotope analyses |
title_full_unstemmed |
Habitat and trophic ecology of Southern Ocean cephalopods from stable isotope analyses |
title_sort |
habitat and trophic ecology of southern ocean cephalopods from stable isotope analyses |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.archives-ouvertes.fr/hal-01212859 https://doi.org/10.3354/meps11266 |
geographic |
Antarctic Indian Kerguelen Kerguelen Islands Southern Ocean |
geographic_facet |
Antarctic Indian Kerguelen Kerguelen Islands Southern Ocean |
genre |
Antarc* Antarctic Diomedea exulans Kerguelen Islands Southern Ocean Wandering Albatross |
genre_facet |
Antarc* Antarctic Diomedea exulans Kerguelen Islands Southern Ocean Wandering Albatross |
op_source |
ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.archives-ouvertes.fr/hal-01212859 Marine Ecology Progress Series, 2015, ⟨10.3354/meps11266⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3354/meps11266 hal-01212859 https://hal.archives-ouvertes.fr/hal-01212859 doi:10.3354/meps11266 |
op_doi |
https://doi.org/10.3354/meps11266 |
container_title |
Marine Ecology Progress Series |
container_volume |
530 |
container_start_page |
119 |
op_container_end_page |
134 |
_version_ |
1766202053193891840 |