Anti‑predatory chemical defences in Antarctic benthic fauna

Antarctic benthic communities are largely structured by predation, which leads to the development of mechanisms of repellence. Among those mechanisms, chemical defences are quite extensive, yet poorly understood. To increase knowledge about the role of chemical defences in the Southern Ocean ecosyst...

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Autores: Moles, Juan, Núñez-Pons, L., Taboada, Sergi, Figuerola, Blanca, Cristobo, Javier, Ávila, C.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2015
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/319253
Acceso en línea:http://hdl.handle.net/10261/319253
Access Level:acceso abierto
Palabra clave:Centro Oceanográfico de Gijón
Medio Marino
Antarctica
Benthic fauna
Chemical defences
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spelling Anti‑predatory chemical defences in Antarctic benthic faunaMoles, JuanNúñez-Pons, L.Taboada, SergiFiguerola, BlancaCristobo, JavierÁvila, C.Centro Oceanográfico de GijónMedio MarinoAntarcticaBenthic faunaChemical defencesAntarctic benthic communities are largely structured by predation, which leads to the development of mechanisms of repellence. Among those mechanisms, chemical defences are quite extensive, yet poorly understood. To increase knowledge about the role of chemical defences in the Southern Ocean ecosystems, we assessed the incidence of feeding repellents in sessile and vagile invertebrates from nine phyla: Porifera, Cnidaria, Nemertea, Annelida, Mollusca, Bryozoa, Echinodermata, Hemichordata, and Tunicata (Ascidiacea). Samples were collected at depths of 120–789 m in the eastern Weddell Sea and Bouvet Island, and at depths ranging 0–100 m in the South Shetland Islands. When possible, specimens were dissected to study anatomical allocation of repellents. The common, eurybathic sea star Odontaster validus was chosen to perform feeding repellence bioassays, using diethyl ether (lipophilic) and butanol (hydrophilic) extracts from these samples. Among the 75 species tested, 52 % were studied for the first time for anti-predatory properties. Results provide further evidence of the prevalence of defensive metabolites in Antarctic organisms, with 47 % of the species exhibiting significant repellence within their lipophilic extracts. They also suggest a wider use of nonpolar defensive chemicals. Sessile taxa displayed highest repellence activities, with ascidians, cnidarians, and sponges being the most chemically protected. Overall, the present study indicates that natural products by mediating trophic interactions between prey and their potential predators play an important role in structuring Antarctic benthic ecosystems.SIConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202320232015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/319253reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#ACTIQUIMCentro Oceanográfico de GijónSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3192532026-05-22T06:33:51Z
dc.title.none.fl_str_mv Anti‑predatory chemical defences in Antarctic benthic fauna
title Anti‑predatory chemical defences in Antarctic benthic fauna
spellingShingle Anti‑predatory chemical defences in Antarctic benthic fauna
Moles, Juan
Centro Oceanográfico de Gijón
Medio Marino
Antarctica
Benthic fauna
Chemical defences
title_short Anti‑predatory chemical defences in Antarctic benthic fauna
title_full Anti‑predatory chemical defences in Antarctic benthic fauna
title_fullStr Anti‑predatory chemical defences in Antarctic benthic fauna
title_full_unstemmed Anti‑predatory chemical defences in Antarctic benthic fauna
title_sort Anti‑predatory chemical defences in Antarctic benthic fauna
dc.creator.none.fl_str_mv Moles, Juan
Núñez-Pons, L.
Taboada, Sergi
Figuerola, Blanca
Cristobo, Javier
Ávila, C.
author Moles, Juan
author_facet Moles, Juan
Núñez-Pons, L.
Taboada, Sergi
Figuerola, Blanca
Cristobo, Javier
Ávila, C.
author_role author
author2 Núñez-Pons, L.
Taboada, Sergi
Figuerola, Blanca
Cristobo, Javier
Ávila, C.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Centro Oceanográfico de Gijón
Medio Marino
Antarctica
Benthic fauna
Chemical defences
topic Centro Oceanográfico de Gijón
Medio Marino
Antarctica
Benthic fauna
Chemical defences
description Antarctic benthic communities are largely structured by predation, which leads to the development of mechanisms of repellence. Among those mechanisms, chemical defences are quite extensive, yet poorly understood. To increase knowledge about the role of chemical defences in the Southern Ocean ecosystems, we assessed the incidence of feeding repellents in sessile and vagile invertebrates from nine phyla: Porifera, Cnidaria, Nemertea, Annelida, Mollusca, Bryozoa, Echinodermata, Hemichordata, and Tunicata (Ascidiacea). Samples were collected at depths of 120–789 m in the eastern Weddell Sea and Bouvet Island, and at depths ranging 0–100 m in the South Shetland Islands. When possible, specimens were dissected to study anatomical allocation of repellents. The common, eurybathic sea star Odontaster validus was chosen to perform feeding repellence bioassays, using diethyl ether (lipophilic) and butanol (hydrophilic) extracts from these samples. Among the 75 species tested, 52 % were studied for the first time for anti-predatory properties. Results provide further evidence of the prevalence of defensive metabolites in Antarctic organisms, with 47 % of the species exhibiting significant repellence within their lipophilic extracts. They also suggest a wider use of nonpolar defensive chemicals. Sessile taxa displayed highest repellence activities, with ascidians, cnidarians, and sponges being the most chemically protected. Overall, the present study indicates that natural products by mediating trophic interactions between prey and their potential predators play an important role in structuring Antarctic benthic ecosystems.
publishDate 2015
dc.date.none.fl_str_mv 2015
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/319253
url http://hdl.handle.net/10261/319253
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
ACTIQUIM
Centro Oceanográfico de Gijón
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
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