Alteration of the food web along the Antarctic Peninsula in response to a regional warming trend
International audience In the nearshore coastal waters along the Antarctic Peninsula, a recurrent shift in phytoplankton community structure, from diatoms to cryptophytes, has been documented. The shift was observed in consecutive years (1991-1996) during the austral summer and was correlated in tim...
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ftsorbonneuniv:oai:HAL:hal-03506662v1 2024-09-15T17:42:43+00:00 Alteration of the food web along the Antarctic Peninsula in response to a regional warming trend Moline, Ma Claustre, Hervé Frazer, Tk Schofield, O Vernet, M Laboratoire de Physique et Chimie Marines (LPCM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Génétique et Pathologie Expérimentales Institut Cochin (UMR_S567 / UMR 8104) Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS) 2004 https://hal.science/hal-03506662 https://doi.org/10.1111/j.1365-2486.2004.00825.x en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2486.2004.00825.x hal-03506662 https://hal.science/hal-03506662 doi:10.1111/j.1365-2486.2004.00825.x ISSN: 1354-1013 EISSN: 1365-2486 Global Change Biology https://hal.science/hal-03506662 Global Change Biology, 2004, 10 (12), pp.1973-1980. ⟨10.1111/j.1365-2486.2004.00825.x⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2004 ftsorbonneuniv https://doi.org/10.1111/j.1365-2486.2004.00825.x 2024-07-25T23:47:52Z International audience In the nearshore coastal waters along the Antarctic Peninsula, a recurrent shift in phytoplankton community structure, from diatoms to cryptophytes, has been documented. The shift was observed in consecutive years (1991-1996) during the austral summer and was correlated in time and space with glacial melt-water runoff and reduced surface water salinities. Elevated temperatures along the Peninsula will increase the extent of coastal melt-water zones and the seasonal prevalence of cryptophytes. This is significant because a change from diatoms to cryptophytes represents a marked shift in the size distribution of the phytoplankton community, which will, in turn, impact the zooplankton assemblage. Cryptophytes, because of their small size, are not grazed efficiently by Antarctic krill, a keystone species in the food web. An increase in the abundance and relative proportion of cryptophytes in coastal waters along the Peninsula will likely cause a shift in the spatial distribution of krill and may allow also for the rapid asexual proliferation of carbon poor gelatinous zooplankton, salps in particular. This scenario may account for the reported increase in the frequency of occurrence and abundance of large swarms of salps within the region. Salps are not a preferred food source for organisms that occupy higher trophic levels in the food web, specifically penguins and seals, and thus negative feedbacks to the ecology of these consumers can be anticipated as a consequence of shifts in phytoplankton community composition. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctic Peninsula HAL Sorbonne Université Global Change Biology 10 12 1973 1980 |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Moline, Ma Claustre, Hervé Frazer, Tk Schofield, O Vernet, M Alteration of the food web along the Antarctic Peninsula in response to a regional warming trend |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience In the nearshore coastal waters along the Antarctic Peninsula, a recurrent shift in phytoplankton community structure, from diatoms to cryptophytes, has been documented. The shift was observed in consecutive years (1991-1996) during the austral summer and was correlated in time and space with glacial melt-water runoff and reduced surface water salinities. Elevated temperatures along the Peninsula will increase the extent of coastal melt-water zones and the seasonal prevalence of cryptophytes. This is significant because a change from diatoms to cryptophytes represents a marked shift in the size distribution of the phytoplankton community, which will, in turn, impact the zooplankton assemblage. Cryptophytes, because of their small size, are not grazed efficiently by Antarctic krill, a keystone species in the food web. An increase in the abundance and relative proportion of cryptophytes in coastal waters along the Peninsula will likely cause a shift in the spatial distribution of krill and may allow also for the rapid asexual proliferation of carbon poor gelatinous zooplankton, salps in particular. This scenario may account for the reported increase in the frequency of occurrence and abundance of large swarms of salps within the region. Salps are not a preferred food source for organisms that occupy higher trophic levels in the food web, specifically penguins and seals, and thus negative feedbacks to the ecology of these consumers can be anticipated as a consequence of shifts in phytoplankton community composition. |
author2 |
Laboratoire de Physique et Chimie Marines (LPCM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Génétique et Pathologie Expérimentales Institut Cochin (UMR_S567 / UMR 8104) Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Moline, Ma Claustre, Hervé Frazer, Tk Schofield, O Vernet, M |
author_facet |
Moline, Ma Claustre, Hervé Frazer, Tk Schofield, O Vernet, M |
author_sort |
Moline, Ma |
title |
Alteration of the food web along the Antarctic Peninsula in response to a regional warming trend |
title_short |
Alteration of the food web along the Antarctic Peninsula in response to a regional warming trend |
title_full |
Alteration of the food web along the Antarctic Peninsula in response to a regional warming trend |
title_fullStr |
Alteration of the food web along the Antarctic Peninsula in response to a regional warming trend |
title_full_unstemmed |
Alteration of the food web along the Antarctic Peninsula in response to a regional warming trend |
title_sort |
alteration of the food web along the antarctic peninsula in response to a regional warming trend |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.science/hal-03506662 https://doi.org/10.1111/j.1365-2486.2004.00825.x |
genre |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula |
op_source |
ISSN: 1354-1013 EISSN: 1365-2486 Global Change Biology https://hal.science/hal-03506662 Global Change Biology, 2004, 10 (12), pp.1973-1980. ⟨10.1111/j.1365-2486.2004.00825.x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1365-2486.2004.00825.x hal-03506662 https://hal.science/hal-03506662 doi:10.1111/j.1365-2486.2004.00825.x |
op_doi |
https://doi.org/10.1111/j.1365-2486.2004.00825.x |
container_title |
Global Change Biology |
container_volume |
10 |
container_issue |
12 |
container_start_page |
1973 |
op_container_end_page |
1980 |
_version_ |
1810489434358939648 |