Rôle de la glace saisonnière dans la dynamique de l'écosystème marin de l'Antarctique : impact potentiel du changement climatique global
Seasonal ice cover is linked to an intense biological activity in polar regions. Every year, ice melting induces the stabilisation of the water column which can be observed until 150 km from the margin of seasonal ice, favoring the development of profuse phytoplankton blooms. For the case of Antarct...
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ftdoajarticles:oai:doaj.org/article:2d8ada1680b943a28e16186227ff205c 2024-09-15T17:48:15+00:00 Rôle de la glace saisonnière dans la dynamique de l'écosystème marin de l'Antarctique : impact potentiel du changement climatique global Gustavo Ferreyra Irene Schloss Serge Demers https://doi.org/10.4000/vertigo.3172 https://doaj.org/article/2d8ada1680b943a28e16186227ff205c FR fre Éditions en environnement VertigO https://journals.openedition.org/vertigo/3172 https://doaj.org/toc/1492-8442 1492-8442 doi:10.4000/vertigo.3172 https://doaj.org/article/2d8ada1680b943a28e16186227ff205c VertigO, Vol 5, Iss 3 seasonal ice marginal ice phytoplankton krill salps global change Environmental sciences GE1-350 article ftdoajarticles https://doi.org/10.4000/vertigo.3172 2024-08-05T17:50:02Z Seasonal ice cover is linked to an intense biological activity in polar regions. Every year, ice melting induces the stabilisation of the water column which can be observed until 150 km from the margin of seasonal ice, favoring the development of profuse phytoplankton blooms. For the case of Antarctica, life cycles of key species in the ecosystem, particularly the krill Euphausia superba, strongly depends on ice dynamics. This species has been considered as the main link between phytoplankton and higher trophic levels in the food web (fishes, birds and mammals). Several field observations as well as models suggest a replacement of krill by another group of organisms: the salps (particularly Salpa thompsoni). Such replacement has been related to the decrease in duration and extent of seasonal ice during the last decades, which in turn shows a strong correlation with the air temperature increase in some areas of Antarctica (Amundsen – Bellingshausen seas and Antarctic Peninsula). These changes could have significant consequences for both the biodiversity and the functioning of the Antarctic ecosystem, since salps represent a low energy source for high predators. The potential significance of the above processes on Antarctic ecosystem dynamics is analysed in the present paper. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Euphausia superba Directory of Open Access Journals: DOAJ Articles |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
French |
topic |
seasonal ice marginal ice phytoplankton krill salps global change Environmental sciences GE1-350 |
spellingShingle |
seasonal ice marginal ice phytoplankton krill salps global change Environmental sciences GE1-350 Gustavo Ferreyra Irene Schloss Serge Demers Rôle de la glace saisonnière dans la dynamique de l'écosystème marin de l'Antarctique : impact potentiel du changement climatique global |
topic_facet |
seasonal ice marginal ice phytoplankton krill salps global change Environmental sciences GE1-350 |
description |
Seasonal ice cover is linked to an intense biological activity in polar regions. Every year, ice melting induces the stabilisation of the water column which can be observed until 150 km from the margin of seasonal ice, favoring the development of profuse phytoplankton blooms. For the case of Antarctica, life cycles of key species in the ecosystem, particularly the krill Euphausia superba, strongly depends on ice dynamics. This species has been considered as the main link between phytoplankton and higher trophic levels in the food web (fishes, birds and mammals). Several field observations as well as models suggest a replacement of krill by another group of organisms: the salps (particularly Salpa thompsoni). Such replacement has been related to the decrease in duration and extent of seasonal ice during the last decades, which in turn shows a strong correlation with the air temperature increase in some areas of Antarctica (Amundsen – Bellingshausen seas and Antarctic Peninsula). These changes could have significant consequences for both the biodiversity and the functioning of the Antarctic ecosystem, since salps represent a low energy source for high predators. The potential significance of the above processes on Antarctic ecosystem dynamics is analysed in the present paper. |
format |
Article in Journal/Newspaper |
author |
Gustavo Ferreyra Irene Schloss Serge Demers |
author_facet |
Gustavo Ferreyra Irene Schloss Serge Demers |
author_sort |
Gustavo Ferreyra |
title |
Rôle de la glace saisonnière dans la dynamique de l'écosystème marin de l'Antarctique : impact potentiel du changement climatique global |
title_short |
Rôle de la glace saisonnière dans la dynamique de l'écosystème marin de l'Antarctique : impact potentiel du changement climatique global |
title_full |
Rôle de la glace saisonnière dans la dynamique de l'écosystème marin de l'Antarctique : impact potentiel du changement climatique global |
title_fullStr |
Rôle de la glace saisonnière dans la dynamique de l'écosystème marin de l'Antarctique : impact potentiel du changement climatique global |
title_full_unstemmed |
Rôle de la glace saisonnière dans la dynamique de l'écosystème marin de l'Antarctique : impact potentiel du changement climatique global |
title_sort |
rôle de la glace saisonnière dans la dynamique de l'écosystème marin de l'antarctique : impact potentiel du changement climatique global |
publisher |
Éditions en environnement VertigO |
url |
https://doi.org/10.4000/vertigo.3172 https://doaj.org/article/2d8ada1680b943a28e16186227ff205c |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Euphausia superba |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Euphausia superba |
op_source |
VertigO, Vol 5, Iss 3 |
op_relation |
https://journals.openedition.org/vertigo/3172 https://doaj.org/toc/1492-8442 1492-8442 doi:10.4000/vertigo.3172 https://doaj.org/article/2d8ada1680b943a28e16186227ff205c |
op_doi |
https://doi.org/10.4000/vertigo.3172 |
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1810289403055046656 |