A temporal analysis on the dynamics of deep-sea macrofauna: Influence of environmental variability off Catalonia coast (western Mediterranean)

A seasonal analysis of deep-sea infauna (macrobenthos) based on quantitative sampling was conducted over the Catalan Sea slope, within the Besòs canyon (at ∼550–600 m) and on its adjacent slope (at 800 m). Both sites were sampled in February, April, June–July and October 2007. Environmental variable...

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Detalhes bibliográficos
Autores: Mamouridis, V., Cartes, Joan Enric, Parra-Descalzo, Santiago, Fanelli, Emanuela, Saiz-Salinas, José Ignacio
Tipo de documento: artigo
Data de publicação:2011
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/316428
Acesso em linha:http://hdl.handle.net/10261/316428
Access Level:Acceso aberto
Palavra-chave:Centro Oceanográfico de A Coruña
Medio Marino
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spelling A temporal analysis on the dynamics of deep-sea macrofauna: Influence of environmental variability off Catalonia coast (western Mediterranean)Mamouridis, V.Cartes, Joan EnricParra-Descalzo, SantiagoFanelli, EmanuelaSaiz-Salinas, José IgnacioCentro Oceanográfico de A CoruñaMedio MarinoA seasonal analysis of deep-sea infauna (macrobenthos) based on quantitative sampling was conducted over the Catalan Sea slope, within the Besòs canyon (at ∼550–600 m) and on its adjacent slope (at 800 m). Both sites were sampled in February, April, June–July and October 2007. Environmental variables influencing faunal distribution were also recorded in the sediment and sediment/water interface. Dynamics of macrobenthos at the two stations showed differences in biomass/abundance patterns and trophic structures. Biomass was higher inside the Besòs canyon than on the adjacent slope. The community was mostly dominated by surface-deposit feeding polychaetes (Ampharetidae, Paraonidae, Flabelligeridae) and crustaceans (amphipods such as Carangoliopsis spinulosa and Harpinia spp.) inside the canyon, while subsurface deposit feeders (mainly the sipunculan Onchnesoma steenstrupii) were dominant over the adjacent slope. The taxonomic composition in the suprabenthic assemblages of polychaetes, collected on the adjacent slope by a suprabenthic sledge, was clearly different from that collected by the box-corer. The suprabenthic assemblage was dominated by carnivorous forms (mainly Harmothoe sp. and Nephthys spp.) and linked to higher near-bottom turbidity. Inside Besòs a clear temporal succession of species was related to both food availability and quality and the proliferation of opportunistic species was consistent with higher variability in food sources (TOC, C/N, δ13C) in comparison to adjacent slope. This was likely caused by a greater influence of terrigenous inputs from river discharges. Inside the canyon, Capitellidae, Spionidae and Flabelligeridae, in general considered as deposit feeders, were more abundant in June–July coinciding with a clear signal of terrigenous carbon (depleted δ13C, high C/N) in the sediments. By contrast, during October and under conditions of high water turbidity and increases of TOM, carnivorous polychaetes (Glyceridae, Onuphidae) increased. Total macrobenthos biomass found over Catalonian slopes were higher than that found in the neighboring Toulon canyon, probably because the two canyons are influenced by different river inputs, connected with distinct terrigenous sources.Sí202320232011info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/316428reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCentro Oceanográfico de A Coruñainfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3164282026-05-22T06:33:51Z
dc.title.none.fl_str_mv A temporal analysis on the dynamics of deep-sea macrofauna: Influence of environmental variability off Catalonia coast (western Mediterranean)
title A temporal analysis on the dynamics of deep-sea macrofauna: Influence of environmental variability off Catalonia coast (western Mediterranean)
spellingShingle A temporal analysis on the dynamics of deep-sea macrofauna: Influence of environmental variability off Catalonia coast (western Mediterranean)
Mamouridis, V.
Centro Oceanográfico de A Coruña
Medio Marino
title_short A temporal analysis on the dynamics of deep-sea macrofauna: Influence of environmental variability off Catalonia coast (western Mediterranean)
title_full A temporal analysis on the dynamics of deep-sea macrofauna: Influence of environmental variability off Catalonia coast (western Mediterranean)
title_fullStr A temporal analysis on the dynamics of deep-sea macrofauna: Influence of environmental variability off Catalonia coast (western Mediterranean)
title_full_unstemmed A temporal analysis on the dynamics of deep-sea macrofauna: Influence of environmental variability off Catalonia coast (western Mediterranean)
title_sort A temporal analysis on the dynamics of deep-sea macrofauna: Influence of environmental variability off Catalonia coast (western Mediterranean)
dc.creator.none.fl_str_mv Mamouridis, V.
Cartes, Joan Enric
Parra-Descalzo, Santiago
Fanelli, Emanuela
Saiz-Salinas, José Ignacio
author Mamouridis, V.
author_facet Mamouridis, V.
Cartes, Joan Enric
Parra-Descalzo, Santiago
Fanelli, Emanuela
Saiz-Salinas, José Ignacio
author_role author
author2 Cartes, Joan Enric
Parra-Descalzo, Santiago
Fanelli, Emanuela
Saiz-Salinas, José Ignacio
author2_role author
author
author
author
dc.subject.none.fl_str_mv Centro Oceanográfico de A Coruña
Medio Marino
topic Centro Oceanográfico de A Coruña
Medio Marino
description A seasonal analysis of deep-sea infauna (macrobenthos) based on quantitative sampling was conducted over the Catalan Sea slope, within the Besòs canyon (at ∼550–600 m) and on its adjacent slope (at 800 m). Both sites were sampled in February, April, June–July and October 2007. Environmental variables influencing faunal distribution were also recorded in the sediment and sediment/water interface. Dynamics of macrobenthos at the two stations showed differences in biomass/abundance patterns and trophic structures. Biomass was higher inside the Besòs canyon than on the adjacent slope. The community was mostly dominated by surface-deposit feeding polychaetes (Ampharetidae, Paraonidae, Flabelligeridae) and crustaceans (amphipods such as Carangoliopsis spinulosa and Harpinia spp.) inside the canyon, while subsurface deposit feeders (mainly the sipunculan Onchnesoma steenstrupii) were dominant over the adjacent slope. The taxonomic composition in the suprabenthic assemblages of polychaetes, collected on the adjacent slope by a suprabenthic sledge, was clearly different from that collected by the box-corer. The suprabenthic assemblage was dominated by carnivorous forms (mainly Harmothoe sp. and Nephthys spp.) and linked to higher near-bottom turbidity. Inside Besòs a clear temporal succession of species was related to both food availability and quality and the proliferation of opportunistic species was consistent with higher variability in food sources (TOC, C/N, δ13C) in comparison to adjacent slope. This was likely caused by a greater influence of terrigenous inputs from river discharges. Inside the canyon, Capitellidae, Spionidae and Flabelligeridae, in general considered as deposit feeders, were more abundant in June–July coinciding with a clear signal of terrigenous carbon (depleted δ13C, high C/N) in the sediments. By contrast, during October and under conditions of high water turbidity and increases of TOM, carnivorous polychaetes (Glyceridae, Onuphidae) increased. Total macrobenthos biomass found over Catalonian slopes were higher than that found in the neighboring Toulon canyon, probably because the two canyons are influenced by different river inputs, connected with distinct terrigenous sources.
publishDate 2011
dc.date.none.fl_str_mv 2011
2023
2023
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/10261/316428
url http://hdl.handle.net/10261/316428
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Centro Oceanográfico de A Coruña
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
repository.mail.fl_str_mv
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score 15,812429

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