West Greenland ichthyoplankton and how melting glaciers could allow Arctic cod larvae to survive extreme summer temperatures
International audience Climate change is rapidly modifying marine fish assemblages in the Arctic. As fish eggs and larvae have a narrower thermal tolerance than nonreproductive adults, their response to increasing temperatures is likely one of the main drivers of these changes. In this study, we des...
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Online Access: | https://amu.hal.science/hal-03663191 https://amu.hal.science/hal-03663191/document https://amu.hal.science/hal-03663191/file/as-2020-0019.pdf https://doi.org/10.1139/as-2020-0019 |
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ftccsdartic:oai:HAL:hal-03663191v1 2023-12-17T10:23:01+01:00 West Greenland ichthyoplankton and how melting glaciers could allow Arctic cod larvae to survive extreme summer temperatures Bodnár, Tomáš Fraunié, Philippe Knobloch, Petr Řezníček, Hynek Bouchard, Caroline Charbogne, Agathe Baumgartner, Fabienne Maes, Sarah Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) 2021-03-01 https://amu.hal.science/hal-03663191 https://amu.hal.science/hal-03663191/document https://amu.hal.science/hal-03663191/file/as-2020-0019.pdf https://doi.org/10.1139/as-2020-0019 en eng HAL CCSD NRC Research Press info:eu-repo/semantics/altIdentifier/doi/10.1139/as-2020-0019 hal-03663191 https://amu.hal.science/hal-03663191 https://amu.hal.science/hal-03663191/document https://amu.hal.science/hal-03663191/file/as-2020-0019.pdf doi:10.1139/as-2020-0019 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2368-7460 Arctic Science https://amu.hal.science/hal-03663191 Arctic Science, 2021, 7 (1), pp.217-239. ⟨10.1139/as-2020-0019⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2021 ftccsdartic https://doi.org/10.1139/as-2020-0019 2023-11-19T00:11:52Z International audience Climate change is rapidly modifying marine fish assemblages in the Arctic. As fish eggs and larvae have a narrower thermal tolerance than nonreproductive adults, their response to increasing temperatures is likely one of the main drivers of these changes. In this study, we described ichthyoplankton assemblages in West Greenland between 62 and 73 °N, during summers 2017–2019, and investigated the relationship between sea surface temperature in the spring and summer and the survival of Arctic cod (Boreogadus saida (Lepechin, 1774)) early life stages over the hatching season. Warm years were associated with partial recruitment failures resulting from thermal stress to the eggs and larvae hatched late in the season. Using past environmental conditions, we forecasted an imminent decline in Arctic cod recruitment in the regions of Uummannaq and Disko Bay. Observations from fjords suggested that glacial meltwater could create a subsurface thermal refuge allowing Arctic cod larvae to survive despite very high summer sea surface temperature (ca. 10 °C). As the Greenland ice sheet is melting at an unprecedented speed, the mechanism underlying the “glacial meltwater summer refuge hypothesis” could curb some of the negative effects of ocean warming on the survival of young Arctic cod in West Greenland and other Arctic fjord systems. Article in Journal/Newspaper Arctic Arctic cod Arctic Boreogadus saida Climate change Disko Bay Greenland Ice Sheet Uummannaq Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Greenland Arctic Science 7 1 217 239 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Bodnár, Tomáš Fraunié, Philippe Knobloch, Petr Řezníček, Hynek Bouchard, Caroline Charbogne, Agathe Baumgartner, Fabienne Maes, Sarah West Greenland ichthyoplankton and how melting glaciers could allow Arctic cod larvae to survive extreme summer temperatures |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Climate change is rapidly modifying marine fish assemblages in the Arctic. As fish eggs and larvae have a narrower thermal tolerance than nonreproductive adults, their response to increasing temperatures is likely one of the main drivers of these changes. In this study, we described ichthyoplankton assemblages in West Greenland between 62 and 73 °N, during summers 2017–2019, and investigated the relationship between sea surface temperature in the spring and summer and the survival of Arctic cod (Boreogadus saida (Lepechin, 1774)) early life stages over the hatching season. Warm years were associated with partial recruitment failures resulting from thermal stress to the eggs and larvae hatched late in the season. Using past environmental conditions, we forecasted an imminent decline in Arctic cod recruitment in the regions of Uummannaq and Disko Bay. Observations from fjords suggested that glacial meltwater could create a subsurface thermal refuge allowing Arctic cod larvae to survive despite very high summer sea surface temperature (ca. 10 °C). As the Greenland ice sheet is melting at an unprecedented speed, the mechanism underlying the “glacial meltwater summer refuge hypothesis” could curb some of the negative effects of ocean warming on the survival of young Arctic cod in West Greenland and other Arctic fjord systems. |
author2 |
Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Bodnár, Tomáš Fraunié, Philippe Knobloch, Petr Řezníček, Hynek Bouchard, Caroline Charbogne, Agathe Baumgartner, Fabienne Maes, Sarah |
author_facet |
Bodnár, Tomáš Fraunié, Philippe Knobloch, Petr Řezníček, Hynek Bouchard, Caroline Charbogne, Agathe Baumgartner, Fabienne Maes, Sarah |
author_sort |
Bodnár, Tomáš |
title |
West Greenland ichthyoplankton and how melting glaciers could allow Arctic cod larvae to survive extreme summer temperatures |
title_short |
West Greenland ichthyoplankton and how melting glaciers could allow Arctic cod larvae to survive extreme summer temperatures |
title_full |
West Greenland ichthyoplankton and how melting glaciers could allow Arctic cod larvae to survive extreme summer temperatures |
title_fullStr |
West Greenland ichthyoplankton and how melting glaciers could allow Arctic cod larvae to survive extreme summer temperatures |
title_full_unstemmed |
West Greenland ichthyoplankton and how melting glaciers could allow Arctic cod larvae to survive extreme summer temperatures |
title_sort |
west greenland ichthyoplankton and how melting glaciers could allow arctic cod larvae to survive extreme summer temperatures |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://amu.hal.science/hal-03663191 https://amu.hal.science/hal-03663191/document https://amu.hal.science/hal-03663191/file/as-2020-0019.pdf https://doi.org/10.1139/as-2020-0019 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Arctic cod Arctic Boreogadus saida Climate change Disko Bay Greenland Ice Sheet Uummannaq |
genre_facet |
Arctic Arctic cod Arctic Boreogadus saida Climate change Disko Bay Greenland Ice Sheet Uummannaq |
op_source |
ISSN: 2368-7460 Arctic Science https://amu.hal.science/hal-03663191 Arctic Science, 2021, 7 (1), pp.217-239. ⟨10.1139/as-2020-0019⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1139/as-2020-0019 hal-03663191 https://amu.hal.science/hal-03663191 https://amu.hal.science/hal-03663191/document https://amu.hal.science/hal-03663191/file/as-2020-0019.pdf doi:10.1139/as-2020-0019 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1139/as-2020-0019 |
container_title |
Arctic Science |
container_volume |
7 |
container_issue |
1 |
container_start_page |
217 |
op_container_end_page |
239 |
_version_ |
1785555364403478528 |