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
- Institución
- Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
- OAI Identificador
- paperaa:paper_09541020_v16_n2_p123_Tatian
Ver los metadatos del registro completo
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paperaa:paper_09541020_v16_n2_p123_Tatian |
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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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1844618735897280512 |
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13.070432 |