A new trophic link between the pelagic and benthic systems on the Antarctic shelf

7 pages, 5 figures, 2 tables

Detalles Bibliográficos
Autores: Gili, Josep Maria, Rossi, Sergio, Pagès, Francesc, Orejas, Covadonga, Teixidó, Nuria, López-González, Pablo J., Arntz, Wolf E.
Tipo de recurso: artículo
Fecha de publicación:2006
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/121350
Acceso en línea:http://hdl.handle.net/10261/121350
Access Level:acceso abierto
Palabra clave:Salps
Antarctic
Octocorals
Benthic suspension feeders
Trophic links
Bentho-pelagic coupling
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spelling A new trophic link between the pelagic and benthic systems on the Antarctic shelfGili, Josep MariaRossi, SergioPagès, FrancescOrejas, CovadongaTeixidó, NuriaLópez-González, Pablo J.Arntz, Wolf E.SalpsAntarcticOctocoralsBenthic suspension feedersTrophic linksBentho-pelagic coupling7 pages, 5 figures, 2 tablesDuring the expeditions EASIZ II and EASIZ III carried out off the Antarctic Peninsula with RV 'Polarstern', a prey, until now never registered, was observed in the gastrovascular cavities of octocorallian Anthomastus bathyproctus colonies. A. bathyproctus gastrovascular contents contained salps of the species Salpa thompsoni in 83 to 88% of the colonies. Salps represented almost 100% of the prey items found in the octocorallian polyps. Salp chains were observed drifting just above the sediment. These chains undertook vertical migrations down to a depth of 700 m, reaching the seafloor. The captured salps had stomachs full of microplanktic prey, mainly diatoms and other phytoplankton cells. Fatty acids, considered to be of diatom origin, were detected in the stomachs of salps and in their tunica. The presence of such signature lipids was also detected in the octocorallian coenenchyme, although their concentration was considerably lower. These results suggest that salps may play an important role as a direct grazer of the phytoplankton produced in the top layers of the water column which, in turn, would be directly transferred to A. bathyproctus. An important part of the fresh contents of the salps will be assimilated by the octocorallians. Primary production is captured by a benthic suspension feeder through the grazer, bypassing the faecal pellet rain. The combined filtering activity and vertical migration of salps produces an 'elevator effect', which reduces the loss of energy through this short food chain, thus making the exchange between top and bottom layers more efficient. © Inter-Research 2006Financial support for this study was provided by the Spanish Antarctic Research Programme, Grants ANT1999-1608-E, REN2000-3096-E/ANT and REN2003-04236, and by the programme Acciones Integradas of the Spanish Ministerio de Asuntos Exteriores and Deutscher Akademischer Austauschdienst (DAAD), Grant 314-Al-e-drPeer ReviewedInter Research20062015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/121350reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.3354/meps322043info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1213502026-05-22T06:33:51Z
dc.title.none.fl_str_mv A new trophic link between the pelagic and benthic systems on the Antarctic shelf
title A new trophic link between the pelagic and benthic systems on the Antarctic shelf
spellingShingle A new trophic link between the pelagic and benthic systems on the Antarctic shelf
Gili, Josep Maria
Salps
Antarctic
Octocorals
Benthic suspension feeders
Trophic links
Bentho-pelagic coupling
title_short A new trophic link between the pelagic and benthic systems on the Antarctic shelf
title_full A new trophic link between the pelagic and benthic systems on the Antarctic shelf
title_fullStr A new trophic link between the pelagic and benthic systems on the Antarctic shelf
title_full_unstemmed A new trophic link between the pelagic and benthic systems on the Antarctic shelf
title_sort A new trophic link between the pelagic and benthic systems on the Antarctic shelf
dc.creator.none.fl_str_mv Gili, Josep Maria
Rossi, Sergio
Pagès, Francesc
Orejas, Covadonga
Teixidó, Nuria
López-González, Pablo J.
Arntz, Wolf E.
author Gili, Josep Maria
author_facet Gili, Josep Maria
Rossi, Sergio
Pagès, Francesc
Orejas, Covadonga
Teixidó, Nuria
López-González, Pablo J.
Arntz, Wolf E.
author_role author
author2 Rossi, Sergio
Pagès, Francesc
Orejas, Covadonga
Teixidó, Nuria
López-González, Pablo J.
Arntz, Wolf E.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Salps
Antarctic
Octocorals
Benthic suspension feeders
Trophic links
Bentho-pelagic coupling
topic Salps
Antarctic
Octocorals
Benthic suspension feeders
Trophic links
Bentho-pelagic coupling
description 7 pages, 5 figures, 2 tables
publishDate 2006
dc.date.none.fl_str_mv 2006
2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/121350
url http://hdl.handle.net/10261/121350
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.3354/meps322043
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Inter Research
publisher.none.fl_str_mv Inter Research
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
repository.mail.fl_str_mv
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score 15.812429

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