Diet components in the food of Antarctic ascidians living at low levels of primary production

Autores
Tatián, M.; Sahade, R.; Esnal, G.B.
Año de publicación
2004
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Coupling between pelagic and benthic systems has been described in numerous shallow water communities. In Potter Cove, where pelagic primary production is low (not only during the Antarctic winter but also during the summer), the rich benthic community present there must depend on other food sources than phytoplankton. Over a year-round period we determined the abundance of the different seston particles which constituted the stomach contents of the Antarctic ascidian Cnemidocarpa verrucosa (Lesson, 1830) at Potter Cove. Stomach repletion was highest in November and lowest in June. Ascidians took in a wide range of particles from large detritus (macroalgal debris and faecal pellets) to minute particles < 5 μm. Large detritus and minute particles together represent the main percentage of contents throughout the year (mean 91%). Diatoms were a low percentage (mean 4.5%). Unidentified flagellates, dinoflagellates and coccolithophorids were scarce, with mean values lower than 4%. Among diatoms benthic species were more abundant in summer and pelagic ones prevailed from March to November. Resuspension of benthic material due to wind mixing and the input of allochthonous particles by currents are important mechanisms that ensure food for ascidians and the community of suspension feeders in Potter Cove.
Fil:Esnal, G.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fuente
Antarct. Sci. 2004;16(2):123-128
Materia
Benthos
Seston
South Shetland Islands
Southern Ocean
Stomach contents
benthic-pelagic coupling
diet
food supply
primary production
resuspension
Antarctica
King George Island
Potter Cove
South Shetland Islands
Ascidia
Ascidiacea
Bacillariophyta
Cnemidocarpa
Cnemidocarpa verrucosa
Dinophyceae
Haptophyceae
Invertebrata
Mastigophora (flagellates)
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/2.5/ar
Repositorio
Biblioteca Digital (UBA-FCEN)
Institución
Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
OAI Identificador
paperaa:paper_09541020_v16_n2_p123_Tatian

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oai_identifier_str paperaa:paper_09541020_v16_n2_p123_Tatian
network_acronym_str BDUBAFCEN
repository_id_str 1896
network_name_str Biblioteca Digital (UBA-FCEN)
spelling Diet components in the food of Antarctic ascidians living at low levels of primary productionTatián, M.Sahade, R.Esnal, G.B.BenthosSestonSouth Shetland IslandsSouthern OceanStomach contentsbenthic-pelagic couplingdietfood supplyprimary productionresuspensionAntarcticaKing George IslandPotter CoveSouth Shetland IslandsAscidiaAscidiaceaBacillariophytaCnemidocarpaCnemidocarpa verrucosaDinophyceaeHaptophyceaeInvertebrataMastigophora (flagellates)Coupling between pelagic and benthic systems has been described in numerous shallow water communities. In Potter Cove, where pelagic primary production is low (not only during the Antarctic winter but also during the summer), the rich benthic community present there must depend on other food sources than phytoplankton. Over a year-round period we determined the abundance of the different seston particles which constituted the stomach contents of the Antarctic ascidian Cnemidocarpa verrucosa (Lesson, 1830) at Potter Cove. Stomach repletion was highest in November and lowest in June. Ascidians took in a wide range of particles from large detritus (macroalgal debris and faecal pellets) to minute particles < 5 μm. Large detritus and minute particles together represent the main percentage of contents throughout the year (mean 91%). Diatoms were a low percentage (mean 4.5%). Unidentified flagellates, dinoflagellates and coccolithophorids were scarce, with mean values lower than 4%. Among diatoms benthic species were more abundant in summer and pelagic ones prevailed from March to November. Resuspension of benthic material due to wind mixing and the input of allochthonous particles by currents are important mechanisms that ensure food for ascidians and the community of suspension feeders in Potter Cove.Fil:Esnal, G.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.2004info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12110/paper_09541020_v16_n2_p123_TatianAntarct. Sci. 2004;16(2):123-128reponame:Biblioteca Digital (UBA-FCEN)instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesinstacron:UBA-FCENenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/2.5/ar2025-09-29T13:42:57Zpaperaa:paper_09541020_v16_n2_p123_TatianInstitucionalhttps://digital.bl.fcen.uba.ar/Universidad públicaNo correspondehttps://digital.bl.fcen.uba.ar/cgi-bin/oaiserver.cgiana@bl.fcen.uba.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:18962025-09-29 13:42:58.794Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturalesfalse
dc.title.none.fl_str_mv Diet components in the food of Antarctic ascidians living at low levels of primary production
title Diet components in the food of Antarctic ascidians living at low levels of primary production
spellingShingle Diet components in the food of Antarctic ascidians living at low levels of primary production
Tatián, M.
Benthos
Seston
South Shetland Islands
Southern Ocean
Stomach contents
benthic-pelagic coupling
diet
food supply
primary production
resuspension
Antarctica
King George Island
Potter Cove
South Shetland Islands
Ascidia
Ascidiacea
Bacillariophyta
Cnemidocarpa
Cnemidocarpa verrucosa
Dinophyceae
Haptophyceae
Invertebrata
Mastigophora (flagellates)
title_short Diet components in the food of Antarctic ascidians living at low levels of primary production
title_full Diet components in the food of Antarctic ascidians living at low levels of primary production
title_fullStr Diet components in the food of Antarctic ascidians living at low levels of primary production
title_full_unstemmed Diet components in the food of Antarctic ascidians living at low levels of primary production
title_sort Diet components in the food of Antarctic ascidians living at low levels of primary production
dc.creator.none.fl_str_mv Tatián, M.
Sahade, R.
Esnal, G.B.
author Tatián, M.
author_facet Tatián, M.
Sahade, R.
Esnal, G.B.
author_role author
author2 Sahade, R.
Esnal, G.B.
author2_role author
author
dc.subject.none.fl_str_mv Benthos
Seston
South Shetland Islands
Southern Ocean
Stomach contents
benthic-pelagic coupling
diet
food supply
primary production
resuspension
Antarctica
King George Island
Potter Cove
South Shetland Islands
Ascidia
Ascidiacea
Bacillariophyta
Cnemidocarpa
Cnemidocarpa verrucosa
Dinophyceae
Haptophyceae
Invertebrata
Mastigophora (flagellates)
topic Benthos
Seston
South Shetland Islands
Southern Ocean
Stomach contents
benthic-pelagic coupling
diet
food supply
primary production
resuspension
Antarctica
King George Island
Potter Cove
South Shetland Islands
Ascidia
Ascidiacea
Bacillariophyta
Cnemidocarpa
Cnemidocarpa verrucosa
Dinophyceae
Haptophyceae
Invertebrata
Mastigophora (flagellates)
dc.description.none.fl_txt_mv Coupling between pelagic and benthic systems has been described in numerous shallow water communities. In Potter Cove, where pelagic primary production is low (not only during the Antarctic winter but also during the summer), the rich benthic community present there must depend on other food sources than phytoplankton. Over a year-round period we determined the abundance of the different seston particles which constituted the stomach contents of the Antarctic ascidian Cnemidocarpa verrucosa (Lesson, 1830) at Potter Cove. Stomach repletion was highest in November and lowest in June. Ascidians took in a wide range of particles from large detritus (macroalgal debris and faecal pellets) to minute particles < 5 μm. Large detritus and minute particles together represent the main percentage of contents throughout the year (mean 91%). Diatoms were a low percentage (mean 4.5%). Unidentified flagellates, dinoflagellates and coccolithophorids were scarce, with mean values lower than 4%. Among diatoms benthic species were more abundant in summer and pelagic ones prevailed from March to November. Resuspension of benthic material due to wind mixing and the input of allochthonous particles by currents are important mechanisms that ensure food for ascidians and the community of suspension feeders in Potter Cove.
Fil:Esnal, G.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
description Coupling between pelagic and benthic systems has been described in numerous shallow water communities. In Potter Cove, where pelagic primary production is low (not only during the Antarctic winter but also during the summer), the rich benthic community present there must depend on other food sources than phytoplankton. Over a year-round period we determined the abundance of the different seston particles which constituted the stomach contents of the Antarctic ascidian Cnemidocarpa verrucosa (Lesson, 1830) at Potter Cove. Stomach repletion was highest in November and lowest in June. Ascidians took in a wide range of particles from large detritus (macroalgal debris and faecal pellets) to minute particles < 5 μm. Large detritus and minute particles together represent the main percentage of contents throughout the year (mean 91%). Diatoms were a low percentage (mean 4.5%). Unidentified flagellates, dinoflagellates and coccolithophorids were scarce, with mean values lower than 4%. Among diatoms benthic species were more abundant in summer and pelagic ones prevailed from March to November. Resuspension of benthic material due to wind mixing and the input of allochthonous particles by currents are important mechanisms that ensure food for ascidians and the community of suspension feeders in Potter Cove.
publishDate 2004
dc.date.none.fl_str_mv 2004
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12110/paper_09541020_v16_n2_p123_Tatian
url http://hdl.handle.net/20.500.12110/paper_09541020_v16_n2_p123_Tatian
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/2.5/ar
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/2.5/ar
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv Antarct. Sci. 2004;16(2):123-128
reponame:Biblioteca Digital (UBA-FCEN)
instname:Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron:UBA-FCEN
reponame_str Biblioteca Digital (UBA-FCEN)
collection Biblioteca Digital (UBA-FCEN)
instname_str Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
instacron_str UBA-FCEN
institution UBA-FCEN
repository.name.fl_str_mv Biblioteca Digital (UBA-FCEN) - Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
repository.mail.fl_str_mv ana@bl.fcen.uba.ar
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