Geographic and seasonal variability in the isotopic niche of little auks
International audience The non-breeding season of seabirds is extremely challenging to study because it isoften spent offshore under harsh environmental conditions. We used stable isotope analysis to investigatelittle auk Alle alle feeding ecology throughout the annual cycle. The geographic distribu...
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ftecolephe:oai:HAL:hal-01100480v1 2024-05-19T07:28:06+00:00 Geographic and seasonal variability in the isotopic niche of little auks Fort, Jérôme Cherel, Yves Harding, Ann M.A. Welcker, Jorg Jakubas, Dariusz Steen, Harald Karnovsky, Nina J. Grémillet, David Centre d’Ecologie Fonctionnelle et Evolutive (CEFE) Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud )-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Alaska Pacific University Norwegian Polar Institute Department of Vertebrate Ecology and Zoology University of Gdańsk (UG) Pomona College DST-NRF Centre of Excellence at the Percy FitzPatrick Institute University of Cape Town 2010-09-13 https://hal.science/hal-01100480 https://hal.science/hal-01100480/document https://hal.science/hal-01100480/file/Fort%20et%20al._MEPS.pdf https://doi.org/10.3354/meps08721 en eng HAL CCSD Inter Research info:eu-repo/semantics/altIdentifier/doi/10.3354/meps08721 hal-01100480 https://hal.science/hal-01100480 https://hal.science/hal-01100480/document https://hal.science/hal-01100480/file/Fort%20et%20al._MEPS.pdf doi:10.3354/meps08721 info:eu-repo/semantics/OpenAccess ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-01100480 Marine Ecology Progress Series, 2010, 414, pp.293-302. ⟨10.3354/meps08721⟩ Alcid Annual cycle Copepod Diet North Atlantic Pelagic ecosystem Seabird Stable isotopes [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2010 ftecolephe https://doi.org/10.3354/meps08721 2024-04-25T02:04:16Z International audience The non-breeding season of seabirds is extremely challenging to study because it isoften spent offshore under harsh environmental conditions. We used stable isotope analysis to investigatelittle auk Alle alle feeding ecology throughout the annual cycle. The geographic distribution oflittle auks in the Arctic covers a wide range of oceanographic conditions. We sampled birds from 5different colonies located in the most important breeding areas (Greenland and Spitsbergen) toexamine how individuals breeding in contrasting marine environments differ in their trophic nichethroughout the year. We found differences in summer δ15N values among the colonies, suggestingdifferent target species despite low overall δ15N values in blood, which indicates a diet that is primarilycomposed of copepods. A rise in δ15N values between summer and autumn indicated that adultschanged their trophic status to feed at a higher trophic level. During autumn, a large overlap infeather δ13C values between colonies suggests a common moulting area off Northeast Greenland.During winter, the isotopic signatures show that the trophic status of Greenland and Spitsbergenbirds differed, with birds from Greenland feeding at low trophic levels (probably mostly on copepods),and birds from Spitsbergen maintaining a higher trophic level. These findings highlight contrastingseasonal and regional diet in little auk populations, and reveal possible population overlapsduring the autumn moult. We found substantial trophic variability in little auks, which may indicateunsuspected capabilities to adapt to current, drastic environmental change in the North Atlantic. Article in Journal/Newspaper Alle alle Arctic Greenland little auk North Atlantic Copepods Spitsbergen EPHE (Ecole pratique des hautes études, Paris): HAL Marine Ecology Progress Series 414 293 302 |
institution |
Open Polar |
collection |
EPHE (Ecole pratique des hautes études, Paris): HAL |
op_collection_id |
ftecolephe |
language |
English |
topic |
Alcid Annual cycle Copepod Diet North Atlantic Pelagic ecosystem Seabird Stable isotopes [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
Alcid Annual cycle Copepod Diet North Atlantic Pelagic ecosystem Seabird Stable isotopes [SDE.BE]Environmental Sciences/Biodiversity and Ecology Fort, Jérôme Cherel, Yves Harding, Ann M.A. Welcker, Jorg Jakubas, Dariusz Steen, Harald Karnovsky, Nina J. Grémillet, David Geographic and seasonal variability in the isotopic niche of little auks |
topic_facet |
Alcid Annual cycle Copepod Diet North Atlantic Pelagic ecosystem Seabird Stable isotopes [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
International audience The non-breeding season of seabirds is extremely challenging to study because it isoften spent offshore under harsh environmental conditions. We used stable isotope analysis to investigatelittle auk Alle alle feeding ecology throughout the annual cycle. The geographic distribution oflittle auks in the Arctic covers a wide range of oceanographic conditions. We sampled birds from 5different colonies located in the most important breeding areas (Greenland and Spitsbergen) toexamine how individuals breeding in contrasting marine environments differ in their trophic nichethroughout the year. We found differences in summer δ15N values among the colonies, suggestingdifferent target species despite low overall δ15N values in blood, which indicates a diet that is primarilycomposed of copepods. A rise in δ15N values between summer and autumn indicated that adultschanged their trophic status to feed at a higher trophic level. During autumn, a large overlap infeather δ13C values between colonies suggests a common moulting area off Northeast Greenland.During winter, the isotopic signatures show that the trophic status of Greenland and Spitsbergenbirds differed, with birds from Greenland feeding at low trophic levels (probably mostly on copepods),and birds from Spitsbergen maintaining a higher trophic level. These findings highlight contrastingseasonal and regional diet in little auk populations, and reveal possible population overlapsduring the autumn moult. We found substantial trophic variability in little auks, which may indicateunsuspected capabilities to adapt to current, drastic environmental change in the North Atlantic. |
author2 |
Centre d’Ecologie Fonctionnelle et Evolutive (CEFE) Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud )-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Alaska Pacific University Norwegian Polar Institute Department of Vertebrate Ecology and Zoology University of Gdańsk (UG) Pomona College DST-NRF Centre of Excellence at the Percy FitzPatrick Institute University of Cape Town |
format |
Article in Journal/Newspaper |
author |
Fort, Jérôme Cherel, Yves Harding, Ann M.A. Welcker, Jorg Jakubas, Dariusz Steen, Harald Karnovsky, Nina J. Grémillet, David |
author_facet |
Fort, Jérôme Cherel, Yves Harding, Ann M.A. Welcker, Jorg Jakubas, Dariusz Steen, Harald Karnovsky, Nina J. Grémillet, David |
author_sort |
Fort, Jérôme |
title |
Geographic and seasonal variability in the isotopic niche of little auks |
title_short |
Geographic and seasonal variability in the isotopic niche of little auks |
title_full |
Geographic and seasonal variability in the isotopic niche of little auks |
title_fullStr |
Geographic and seasonal variability in the isotopic niche of little auks |
title_full_unstemmed |
Geographic and seasonal variability in the isotopic niche of little auks |
title_sort |
geographic and seasonal variability in the isotopic niche of little auks |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-01100480 https://hal.science/hal-01100480/document https://hal.science/hal-01100480/file/Fort%20et%20al._MEPS.pdf https://doi.org/10.3354/meps08721 |
genre |
Alle alle Arctic Greenland little auk North Atlantic Copepods Spitsbergen |
genre_facet |
Alle alle Arctic Greenland little auk North Atlantic Copepods Spitsbergen |
op_source |
ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-01100480 Marine Ecology Progress Series, 2010, 414, pp.293-302. ⟨10.3354/meps08721⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3354/meps08721 hal-01100480 https://hal.science/hal-01100480 https://hal.science/hal-01100480/document https://hal.science/hal-01100480/file/Fort%20et%20al._MEPS.pdf doi:10.3354/meps08721 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3354/meps08721 |
container_title |
Marine Ecology Progress Series |
container_volume |
414 |
container_start_page |
293 |
op_container_end_page |
302 |
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1799471142365298688 |