Food availability and gut contents in the ascidian Cnemidocarpa verrucosa at Potter Cove, Antarctica

A high seasonality characterizes Antarctic environments, and generates marked differences in availability and composition of food for benthic filter feeders. During a year-round period at Potter Cove, Antarctica, algal pigment concentration (chlorophyll a) and organic matter were measured in water c...

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Detalles Bibliográficos
Autor principal: Esnal, Graciela Beatriz
Publicado: 2002
Materias:
filter feeder
food availability
organic matter
stomach content
zoobenthos
Antarctica
algae
Ascidia
Ascidiacea
Cnemidocarpa
Cnemidocarpa verrucosa
Invertebrata
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07224060_v25_n1_p58_Tatian
http://hdl.handle.net/20.500.12110/paper_07224060_v25_n1_p58_Tatian
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_07224060_v25_n1_p58_Tatian
record_format dspace
spelling paper:paper_07224060_v25_n1_p58_Tatian2023-06-08T15:43:28Z Food availability and gut contents in the ascidian Cnemidocarpa verrucosa at Potter Cove, Antarctica Esnal, Graciela Beatriz filter feeder food availability organic matter stomach content zoobenthos Antarctica algae Ascidia Ascidiacea Cnemidocarpa Cnemidocarpa verrucosa Invertebrata A high seasonality characterizes Antarctic environments, and generates marked differences in availability and composition of food for benthic filter feeders. During a year-round period at Potter Cove, Antarctica, algal pigment concentration (chlorophyll a) and organic matter were measured in water column and sediment samples. Chemical composition of gut contents of the ascidian Cnemidocarpa verrucosa was also analyzed. Despite the low standing stock, capture and absorption of organic matter were detected year-round, suggesting intake of other particles besides microalgae. The mechanism that provides food to the ascidians and epibenthic communities may be related to the supply of allochtonous particles, bottom resuspension events, and microbial community dynamics. Sea-ice cycles may affect food availability in terms of water-column mixing and benthic resuspension. The scarce primary production and the high amount of sedimented material are not limiting conditions in Potter Cove, which presents a rich ascidian community. Fil:Esnal, G.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2002 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07224060_v25_n1_p58_Tatian http://hdl.handle.net/20.500.12110/paper_07224060_v25_n1_p58_Tatian
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic filter feeder
food availability
organic matter
stomach content
zoobenthos
Antarctica
algae
Ascidia
Ascidiacea
Cnemidocarpa
Cnemidocarpa verrucosa
Invertebrata
spellingShingle filter feeder
food availability
organic matter
stomach content
zoobenthos
Antarctica
algae
Ascidia
Ascidiacea
Cnemidocarpa
Cnemidocarpa verrucosa
Invertebrata
Esnal, Graciela Beatriz
Food availability and gut contents in the ascidian Cnemidocarpa verrucosa at Potter Cove, Antarctica
topic_facet filter feeder
food availability
organic matter
stomach content
zoobenthos
Antarctica
algae
Ascidia
Ascidiacea
Cnemidocarpa
Cnemidocarpa verrucosa
Invertebrata
description A high seasonality characterizes Antarctic environments, and generates marked differences in availability and composition of food for benthic filter feeders. During a year-round period at Potter Cove, Antarctica, algal pigment concentration (chlorophyll a) and organic matter were measured in water column and sediment samples. Chemical composition of gut contents of the ascidian Cnemidocarpa verrucosa was also analyzed. Despite the low standing stock, capture and absorption of organic matter were detected year-round, suggesting intake of other particles besides microalgae. The mechanism that provides food to the ascidians and epibenthic communities may be related to the supply of allochtonous particles, bottom resuspension events, and microbial community dynamics. Sea-ice cycles may affect food availability in terms of water-column mixing and benthic resuspension. The scarce primary production and the high amount of sedimented material are not limiting conditions in Potter Cove, which presents a rich ascidian community.
author Esnal, Graciela Beatriz
author_facet Esnal, Graciela Beatriz
author_sort Esnal, Graciela Beatriz
title Food availability and gut contents in the ascidian Cnemidocarpa verrucosa at Potter Cove, Antarctica
title_short Food availability and gut contents in the ascidian Cnemidocarpa verrucosa at Potter Cove, Antarctica
title_full Food availability and gut contents in the ascidian Cnemidocarpa verrucosa at Potter Cove, Antarctica
title_fullStr Food availability and gut contents in the ascidian Cnemidocarpa verrucosa at Potter Cove, Antarctica
title_full_unstemmed Food availability and gut contents in the ascidian Cnemidocarpa verrucosa at Potter Cove, Antarctica
title_sort food availability and gut contents in the ascidian cnemidocarpa verrucosa at potter cove, antarctica
publishDate 2002
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07224060_v25_n1_p58_Tatian
http://hdl.handle.net/20.500.12110/paper_07224060_v25_n1_p58_Tatian
work_keys_str_mv AT esnalgracielabeatriz foodavailabilityandgutcontentsintheascidiancnemidocarpaverrucosaatpottercoveantarctica
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