Trophic plasticity of Antarctic echinoids under contrasted environmental conditions
Echinoids are common members of Antarctic zoobenthos, and different groups can show important trophic diversity. As part of the ANT-XXIX/3 cruise of RV Polarstern, trophic plasticity of sea urchins was studied in three neighbouring regions (Drake Passage, Bransfield Strait and Weddell Sea) featuring...
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ftorbi:oai:orbi.ulg.ac.be:2268/192028 2024-04-21T07:49:13+00:00 Trophic plasticity of Antarctic echinoids under contrasted environmental conditions Michel, Loïc David, Bruno Dubois, Philippe Lepoint, Gilles De Ridder, Chantal MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège 2016-02-12 A0 https://orbi.uliege.be/handle/2268/192028 https://orbi.uliege.be/bitstream/2268/192028/1/MichelL_VLIZ2016.pdf en eng https://orbi.uliege.be/handle/2268/192028 info:hdl:2268/192028 https://orbi.uliege.be/bitstream/2268/192028/1/MichelL_VLIZ2016.pdf open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess VLIZ Marine Scientist Day, Bruges, Belgium [BE], 12/02/2016 Antarctic Echinoids Feeding behaviour Stable isotopes Ecological plasticity diet shift Life sciences Zoology Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Zoologie Sciences de l’environnement & écologie Sciences aquatiques & océanologie conference poster not in proceedings http://purl.org/coar/resource_type/c_18co info:eu-repo/semantics/conferencePoster 2016 ftorbi 2024-03-27T14:47:06Z Echinoids are common members of Antarctic zoobenthos, and different groups can show important trophic diversity. As part of the ANT-XXIX/3 cruise of RV Polarstern, trophic plasticity of sea urchins was studied in three neighbouring regions (Drake Passage, Bransfield Strait and Weddell Sea) featuring several depth-related habitats offering different trophic environments to benthic consumers. Three families with contrasting feeding habits (Cidaridae, Echinidae and Schizasteridae) were studied. Gut content examination and stable isotopes ratios of C and N suggest that each of the studied families showed a different response to variation in environmental and food conditions. Schizasteridae trophic plasticity was low, and these sea urchins were bulk sediment feeders relying on sediment-associated organic matter in all regions and/or depth-related habitats. Cidaridae consumed the most animal-derived material. Their diet varied according to the considered area, as sea urchins from Bransfield Strait relied mostly on living and/or dead animal material, while specimens from Weddell Sea fed on a mixture of dead animal material and other detritus. Echinidae also showed important trophic plasticity. They fed on various detrital items in Bransfield Strait, and selectivity of ingested material varied across depth-related habitats. In Weddell Sea, stable isotopes revealed that they mostly relied on highly 13C-enriched food items, presumably microbially-reworked benthic detritus. The differences in adaptive strategies could lead to family-specific responses of Antarctic echinoids to environmental and food-related changes. vERSO (BR/132/A1/vERSO) Conference Object Antarc* Antarctic Bransfield Strait Drake Passage Weddell Sea University of Liège: ORBi (Open Repository and Bibliography) |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Antarctic Echinoids Feeding behaviour Stable isotopes Ecological plasticity diet shift Life sciences Zoology Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Zoologie Sciences de l’environnement & écologie Sciences aquatiques & océanologie |
spellingShingle |
Antarctic Echinoids Feeding behaviour Stable isotopes Ecological plasticity diet shift Life sciences Zoology Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Zoologie Sciences de l’environnement & écologie Sciences aquatiques & océanologie Michel, Loïc David, Bruno Dubois, Philippe Lepoint, Gilles De Ridder, Chantal Trophic plasticity of Antarctic echinoids under contrasted environmental conditions |
topic_facet |
Antarctic Echinoids Feeding behaviour Stable isotopes Ecological plasticity diet shift Life sciences Zoology Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Zoologie Sciences de l’environnement & écologie Sciences aquatiques & océanologie |
description |
Echinoids are common members of Antarctic zoobenthos, and different groups can show important trophic diversity. As part of the ANT-XXIX/3 cruise of RV Polarstern, trophic plasticity of sea urchins was studied in three neighbouring regions (Drake Passage, Bransfield Strait and Weddell Sea) featuring several depth-related habitats offering different trophic environments to benthic consumers. Three families with contrasting feeding habits (Cidaridae, Echinidae and Schizasteridae) were studied. Gut content examination and stable isotopes ratios of C and N suggest that each of the studied families showed a different response to variation in environmental and food conditions. Schizasteridae trophic plasticity was low, and these sea urchins were bulk sediment feeders relying on sediment-associated organic matter in all regions and/or depth-related habitats. Cidaridae consumed the most animal-derived material. Their diet varied according to the considered area, as sea urchins from Bransfield Strait relied mostly on living and/or dead animal material, while specimens from Weddell Sea fed on a mixture of dead animal material and other detritus. Echinidae also showed important trophic plasticity. They fed on various detrital items in Bransfield Strait, and selectivity of ingested material varied across depth-related habitats. In Weddell Sea, stable isotopes revealed that they mostly relied on highly 13C-enriched food items, presumably microbially-reworked benthic detritus. The differences in adaptive strategies could lead to family-specific responses of Antarctic echinoids to environmental and food-related changes. vERSO (BR/132/A1/vERSO) |
author2 |
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège |
format |
Conference Object |
author |
Michel, Loïc David, Bruno Dubois, Philippe Lepoint, Gilles De Ridder, Chantal |
author_facet |
Michel, Loïc David, Bruno Dubois, Philippe Lepoint, Gilles De Ridder, Chantal |
author_sort |
Michel, Loïc |
title |
Trophic plasticity of Antarctic echinoids under contrasted environmental conditions |
title_short |
Trophic plasticity of Antarctic echinoids under contrasted environmental conditions |
title_full |
Trophic plasticity of Antarctic echinoids under contrasted environmental conditions |
title_fullStr |
Trophic plasticity of Antarctic echinoids under contrasted environmental conditions |
title_full_unstemmed |
Trophic plasticity of Antarctic echinoids under contrasted environmental conditions |
title_sort |
trophic plasticity of antarctic echinoids under contrasted environmental conditions |
publishDate |
2016 |
url |
https://orbi.uliege.be/handle/2268/192028 https://orbi.uliege.be/bitstream/2268/192028/1/MichelL_VLIZ2016.pdf |
genre |
Antarc* Antarctic Bransfield Strait Drake Passage Weddell Sea |
genre_facet |
Antarc* Antarctic Bransfield Strait Drake Passage Weddell Sea |
op_source |
VLIZ Marine Scientist Day, Bruges, Belgium [BE], 12/02/2016 |
op_relation |
https://orbi.uliege.be/handle/2268/192028 info:hdl:2268/192028 https://orbi.uliege.be/bitstream/2268/192028/1/MichelL_VLIZ2016.pdf |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
_version_ |
1796931432551022592 |