Ectosymbiosis associated with cidaroids (Echinodermata: Echinoidea) promotes benthic colonization of the seafloor in the Larsen embayments, western Antarctica
Ice-shelf collapses in the Larsen A and B embayments along the Weddell side of the Antarctic Peninsula resulted in new open-water areas that are likely reorganizing benthic communities. It is a natural laboratory to assess colonization of the sea bottom under new conditions. We tested the hypothesis...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/132470 2023-05-15T13:53:32+02:00 Ectosymbiosis associated with cidaroids (Echinodermata: Echinoidea) promotes benthic colonization of the seafloor in the Larsen embayments, western Antarctica Hardy, Clotilde David, Bruno Rigaud, Thierry De Ridder, Chantal Saucède, Thomas 2011 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/132470 https://dipot.ulb.ac.be/dspace/bitstream/2013/132470/1/Elsevier_114682.pdf en eng uri/info:doi/10.1016/j.dsr2.2010.05.025 uri/info:pii/S096706451000189X uri/info:pmid/10.1016/j.dsr2.2010.05.025 uri/info:scp/79851471438 https://dipot.ulb.ac.be/dspace/bitstream/2013/132470/1/Elsevier_114682.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/132470 1 full-text file(s): info:eu-repo/semantics/restrictedAccess Deep-sea research. Part 2. Topical studies in oceanography, 58 Ecologie [animale] Géologie et minéralogie Géochimie Géologie Biologie des milieux particuliers Antarctica Cidaroid echinoids Diversity Larsen embayments Symbiosis info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2011 ftunivbruxelles 2022-06-12T21:18:48Z Ice-shelf collapses in the Larsen A and B embayments along the Weddell side of the Antarctic Peninsula resulted in new open-water areas that are likely reorganizing benthic communities. It is a natural laboratory to assess colonization of the sea bottom under new conditions. We tested the hypothesis that the epibionts associated to cidaroid echinoids could promote or enhance the colonization of hard surfaces. In fact, being vagile, cidaroids might improve dispersal capabilities of the sessile animals that are attached to their spines, e.g. promoting the colonization of areas where the fauna has been eradicated by iceberg scouring. If this hypothesis is correct, pioneer sessile species present locally on stones might have affinities with ectosymbionts on cidaroids, and the sessile fauna present both on cidaroids and stones should be more similar in the Larsen embayments than in undisturbed areas. We therefore compared sessile species living on cidaroids with those living on stones in three areas: Larsen A and B embayments and two undisturbed and geographically different areas, Atka Bay and Elephant Island. Overall, richness, evaluated as 'morphotypes' richness, was lower in the Larsen area than in other areas, but levels of species diversity were similar among the three zones. The estimate of similarity between assemblages (using the C22 index of Chao et al. 2008) also suggests that cidaroid epibionts are either species-specific or specific to cidaroids, while the composition of sessile fauna on stones is more variable and probably dependent on local factors. In the two undisturbed areas, sessile fauna are highly different between stones and cidaroids. This contrasts with the Larsen embayments where cidaroids share more than 80% of epibionts with the surrounding stones. These results suggest that ectosymbioses linked to cidaroids strongly contribute to benthic colonization of the seafloor in the Larsen enbayments. With time, secondary successions are expected to occur, increasing the difference between epibiotic ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Elephant Island Ice Shelf Iceberg* DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Antarctic Antarctic Peninsula Atka ENVELOPE(151.789,151.789,60.835,60.835) Elephant Island ENVELOPE(-55.184,-55.184,-61.085,-61.085) The Antarctic Weddell |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Ecologie [animale] Géologie et minéralogie Géochimie Géologie Biologie des milieux particuliers Antarctica Cidaroid echinoids Diversity Larsen embayments Symbiosis |
spellingShingle |
Ecologie [animale] Géologie et minéralogie Géochimie Géologie Biologie des milieux particuliers Antarctica Cidaroid echinoids Diversity Larsen embayments Symbiosis Hardy, Clotilde David, Bruno Rigaud, Thierry De Ridder, Chantal Saucède, Thomas Ectosymbiosis associated with cidaroids (Echinodermata: Echinoidea) promotes benthic colonization of the seafloor in the Larsen embayments, western Antarctica |
topic_facet |
Ecologie [animale] Géologie et minéralogie Géochimie Géologie Biologie des milieux particuliers Antarctica Cidaroid echinoids Diversity Larsen embayments Symbiosis |
description |
Ice-shelf collapses in the Larsen A and B embayments along the Weddell side of the Antarctic Peninsula resulted in new open-water areas that are likely reorganizing benthic communities. It is a natural laboratory to assess colonization of the sea bottom under new conditions. We tested the hypothesis that the epibionts associated to cidaroid echinoids could promote or enhance the colonization of hard surfaces. In fact, being vagile, cidaroids might improve dispersal capabilities of the sessile animals that are attached to their spines, e.g. promoting the colonization of areas where the fauna has been eradicated by iceberg scouring. If this hypothesis is correct, pioneer sessile species present locally on stones might have affinities with ectosymbionts on cidaroids, and the sessile fauna present both on cidaroids and stones should be more similar in the Larsen embayments than in undisturbed areas. We therefore compared sessile species living on cidaroids with those living on stones in three areas: Larsen A and B embayments and two undisturbed and geographically different areas, Atka Bay and Elephant Island. Overall, richness, evaluated as 'morphotypes' richness, was lower in the Larsen area than in other areas, but levels of species diversity were similar among the three zones. The estimate of similarity between assemblages (using the C22 index of Chao et al. 2008) also suggests that cidaroid epibionts are either species-specific or specific to cidaroids, while the composition of sessile fauna on stones is more variable and probably dependent on local factors. In the two undisturbed areas, sessile fauna are highly different between stones and cidaroids. This contrasts with the Larsen embayments where cidaroids share more than 80% of epibionts with the surrounding stones. These results suggest that ectosymbioses linked to cidaroids strongly contribute to benthic colonization of the seafloor in the Larsen enbayments. With time, secondary successions are expected to occur, increasing the difference between epibiotic ... |
format |
Article in Journal/Newspaper |
author |
Hardy, Clotilde David, Bruno Rigaud, Thierry De Ridder, Chantal Saucède, Thomas |
author_facet |
Hardy, Clotilde David, Bruno Rigaud, Thierry De Ridder, Chantal Saucède, Thomas |
author_sort |
Hardy, Clotilde |
title |
Ectosymbiosis associated with cidaroids (Echinodermata: Echinoidea) promotes benthic colonization of the seafloor in the Larsen embayments, western Antarctica |
title_short |
Ectosymbiosis associated with cidaroids (Echinodermata: Echinoidea) promotes benthic colonization of the seafloor in the Larsen embayments, western Antarctica |
title_full |
Ectosymbiosis associated with cidaroids (Echinodermata: Echinoidea) promotes benthic colonization of the seafloor in the Larsen embayments, western Antarctica |
title_fullStr |
Ectosymbiosis associated with cidaroids (Echinodermata: Echinoidea) promotes benthic colonization of the seafloor in the Larsen embayments, western Antarctica |
title_full_unstemmed |
Ectosymbiosis associated with cidaroids (Echinodermata: Echinoidea) promotes benthic colonization of the seafloor in the Larsen embayments, western Antarctica |
title_sort |
ectosymbiosis associated with cidaroids (echinodermata: echinoidea) promotes benthic colonization of the seafloor in the larsen embayments, western antarctica |
publishDate |
2011 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/132470 https://dipot.ulb.ac.be/dspace/bitstream/2013/132470/1/Elsevier_114682.pdf |
long_lat |
ENVELOPE(151.789,151.789,60.835,60.835) ENVELOPE(-55.184,-55.184,-61.085,-61.085) |
geographic |
Antarctic Antarctic Peninsula Atka Elephant Island The Antarctic Weddell |
geographic_facet |
Antarctic Antarctic Peninsula Atka Elephant Island The Antarctic Weddell |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Elephant Island Ice Shelf Iceberg* |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Elephant Island Ice Shelf Iceberg* |
op_source |
Deep-sea research. Part 2. Topical studies in oceanography, 58 |
op_relation |
uri/info:doi/10.1016/j.dsr2.2010.05.025 uri/info:pii/S096706451000189X uri/info:pmid/10.1016/j.dsr2.2010.05.025 uri/info:scp/79851471438 https://dipot.ulb.ac.be/dspace/bitstream/2013/132470/1/Elsevier_114682.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/132470 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/restrictedAccess |
_version_ |
1766258721769390080 |