Trophic ecology of Southern Ocean sea stars: Influence of environmental drivers on trophic diversity
Like in the rest of the world, climate change impacts the Southern Ocean, but not in the same way in all regions of this ocean. Changes in sea ice cover around the Antarctic continent are one of the most visible manifestations. For example, sea ice cover has decreased significantly in the Western An...
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fttriple:oai:gotriple.eu:10670/1.zx0biv 2023-05-15T14:03:26+02:00 Trophic ecology of Southern Ocean sea stars: Influence of environmental drivers on trophic diversity Écologie trophique des étoiles de mer de l’Océan Austral : Influence des facteurs environnementaux sur la diversité trophique Le Bourg, Baptiste 2020-01-01 https://archimer.ifremer.fr/doc/00633/74468/74296.pdf https://archimer.ifremer.fr/doc/00633/74468/ fr fre Université de LIège 10670/1.zx0biv https://archimer.ifremer.fr/doc/00633/74468/74296.pdf https://archimer.ifremer.fr/doc/00633/74468/ other Archimer, archive institutionnelle de l'Ifremer geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2020 fttriple 2023-01-22T18:25:45Z Like in the rest of the world, climate change impacts the Southern Ocean, but not in the same way in all regions of this ocean. Changes in sea ice cover around the Antarctic continent are one of the most visible manifestations. For example, sea ice cover has decreased significantly in the Western Antarctic Peninsula while it tends to increase slightly on the rest of the coastline of the continent. These changes in environmental conditions influence the functioning of the ecosystems of this ocean. In particular, the disappearance or persistence of sea ice in a region where it was seasonally present may prevent the appearance of summer phytoplankton blooms, thus impacting the dynamics of krill populations and their predators in the pelagic environment. The benthic environment will also be disturbed by environmental modifications resulting from climate change, as organic matter fluxes toward this compartment will be affected. Sea stars (Echinodermata: Asteroidea) are a key component of Southern Ocean benthos, with 12% of the known sea star species living there. In temperate environments, this taxon may play an important role in the functioning of ecosystems with its trophic interactions controlling the populations of other organisms, which themselves have a large effect on the ecosystems. This group is considered to be quite resistant to changes of seawater temperature in the Antarctic environment. However, it will likely be affected by changes of environmental conditions and functioning of food webs. Indeed, a reduction in the abundance or disappearance of common prey can lead to an increased competition in sea star assemblages. In order to determine the ecological role of sea stars in the Southern Ocean and to understand how they might be impacted by climate change, a study of their trophic ecology and of the factors controlling it is necessary. Therefore, the objectives of this PhD thesis were to determine the trophic role of sea stars in the Southern Ocean, and how environmental factors such as turbidity, depth ... Text Antarc* Antarctic Antarctic Peninsula Sea ice Southern Ocean Unknown Antarctic Antarctic Peninsula Austral Southern Ocean The Antarctic |
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geo envir Le Bourg, Baptiste Trophic ecology of Southern Ocean sea stars: Influence of environmental drivers on trophic diversity |
topic_facet |
geo envir |
description |
Like in the rest of the world, climate change impacts the Southern Ocean, but not in the same way in all regions of this ocean. Changes in sea ice cover around the Antarctic continent are one of the most visible manifestations. For example, sea ice cover has decreased significantly in the Western Antarctic Peninsula while it tends to increase slightly on the rest of the coastline of the continent. These changes in environmental conditions influence the functioning of the ecosystems of this ocean. In particular, the disappearance or persistence of sea ice in a region where it was seasonally present may prevent the appearance of summer phytoplankton blooms, thus impacting the dynamics of krill populations and their predators in the pelagic environment. The benthic environment will also be disturbed by environmental modifications resulting from climate change, as organic matter fluxes toward this compartment will be affected. Sea stars (Echinodermata: Asteroidea) are a key component of Southern Ocean benthos, with 12% of the known sea star species living there. In temperate environments, this taxon may play an important role in the functioning of ecosystems with its trophic interactions controlling the populations of other organisms, which themselves have a large effect on the ecosystems. This group is considered to be quite resistant to changes of seawater temperature in the Antarctic environment. However, it will likely be affected by changes of environmental conditions and functioning of food webs. Indeed, a reduction in the abundance or disappearance of common prey can lead to an increased competition in sea star assemblages. In order to determine the ecological role of sea stars in the Southern Ocean and to understand how they might be impacted by climate change, a study of their trophic ecology and of the factors controlling it is necessary. Therefore, the objectives of this PhD thesis were to determine the trophic role of sea stars in the Southern Ocean, and how environmental factors such as turbidity, depth ... |
format |
Text |
author |
Le Bourg, Baptiste |
author_facet |
Le Bourg, Baptiste |
author_sort |
Le Bourg, Baptiste |
title |
Trophic ecology of Southern Ocean sea stars: Influence of environmental drivers on trophic diversity |
title_short |
Trophic ecology of Southern Ocean sea stars: Influence of environmental drivers on trophic diversity |
title_full |
Trophic ecology of Southern Ocean sea stars: Influence of environmental drivers on trophic diversity |
title_fullStr |
Trophic ecology of Southern Ocean sea stars: Influence of environmental drivers on trophic diversity |
title_full_unstemmed |
Trophic ecology of Southern Ocean sea stars: Influence of environmental drivers on trophic diversity |
title_sort |
trophic ecology of southern ocean sea stars: influence of environmental drivers on trophic diversity |
publisher |
Université de LIège |
publishDate |
2020 |
url |
https://archimer.ifremer.fr/doc/00633/74468/74296.pdf https://archimer.ifremer.fr/doc/00633/74468/ |
geographic |
Antarctic Antarctic Peninsula Austral Southern Ocean The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Austral Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Sea ice Southern Ocean |
op_source |
Archimer, archive institutionnelle de l'Ifremer |
op_relation |
10670/1.zx0biv https://archimer.ifremer.fr/doc/00633/74468/74296.pdf https://archimer.ifremer.fr/doc/00633/74468/ |
op_rights |
other |
_version_ |
1766274105046204416 |