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Abstract:

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.

Registro:

Documento: Artículo
Título:Food availability and gut contents in the ascidian Cnemidocarpa verrucosa at Potter Cove, Antarctica
Autor:Tatián, M.; Sahade, R.; Kowalke, J.; Kivatinitz, S.C.; Esnal, G.B.
Filiación:Cat. Anat. Comparada/Ecologia Marina, F.C.E.F. y Naturales, U.N.C., Av. Velez Sarsfield 299, 5000 Córdoba, Argentina
Alfred-Wegener Inst. Polar/Meeresf., Columbusstrasse, 27515, Bremerhaven, Germany
Facultad de Ciencias Químicas, Pabellón Argentina, Ciudad Universitaria, 5000 Córdoba, Argentina
Departamento de Ciencias Biologicas, Fac. de Ciencas Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
Palabras clave:filter feeder; food availability; organic matter; stomach content; zoobenthos; Antarctica; algae; Ascidia; Ascidiacea; Cnemidocarpa; Cnemidocarpa verrucosa; Invertebrata
Año:2002
Volumen:25
Número:1
Página de inicio:58
Página de fin:64
DOI: http://dx.doi.org/10.1007/s003000100311
Título revista:Polar Biology
Título revista abreviado:Polar Biol.
ISSN:07224060
CODEN:POBID
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07224060_v25_n1_p58_Tatian

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Citas:

---------- APA ----------
Tatián, M., Sahade, R., Kowalke, J., Kivatinitz, S.C. & Esnal, G.B. (2002) . Food availability and gut contents in the ascidian Cnemidocarpa verrucosa at Potter Cove, Antarctica. Polar Biology, 25(1), 58-64.
http://dx.doi.org/10.1007/s003000100311
---------- CHICAGO ----------
Tatián, M., Sahade, R., Kowalke, J., Kivatinitz, S.C., Esnal, G.B. "Food availability and gut contents in the ascidian Cnemidocarpa verrucosa at Potter Cove, Antarctica" . Polar Biology 25, no. 1 (2002) : 58-64.
http://dx.doi.org/10.1007/s003000100311
---------- MLA ----------
Tatián, M., Sahade, R., Kowalke, J., Kivatinitz, S.C., Esnal, G.B. "Food availability and gut contents in the ascidian Cnemidocarpa verrucosa at Potter Cove, Antarctica" . Polar Biology, vol. 25, no. 1, 2002, pp. 58-64.
http://dx.doi.org/10.1007/s003000100311
---------- VANCOUVER ----------
Tatián, M., Sahade, R., Kowalke, J., Kivatinitz, S.C., Esnal, G.B. Food availability and gut contents in the ascidian Cnemidocarpa verrucosa at Potter Cove, Antarctica. Polar Biol. 2002;25(1):58-64.
http://dx.doi.org/10.1007/s003000100311