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Abstract:

Associations of benthic invertebrates from Potter Cove (Antarctica) were defined from phototransects. Density, percentage cover, species richness S', diversity index H', evenness index J' and mean-size estimations were studied in relation to water depth down to 30 m. A clear bathymetric pattern was evident, with two different communities at 15 and 30 m, and a transition area between 20 and 25 m. At 15 m we observed a small number of taxa (nine in total), a high percentage of bare substratum (95%), and the dominant species were pennatulids and the bivalve Laternula elliptica. From 20 to 30 m the dominant species was the ascidian Molgula pedunculata and there was a slight increase in S', H' and J', as well as in the mean size of individuals, especially in M. pedunculata, while the proportion of bare substratum showed a constant decrease with depth. Using multivariate analyses, three faunal assemblages related to depth were defined and a strong association of some species, mainly predators and opportunistic necrophages, with M. pedunculata was revealed. Ice impact (icebergs and anchor ice) seems to be the major regulating factor of benthic assemblages in shallow waters.

Registro:

Documento: Artículo
Título:Benthic faunal associations on soft substrates at Potter Cove, King George Island, Antarctica
Autor:Sahade, R.; Tatián, M.; Kowalke, J.; Kühne, S.; Esnal, G.B.
Filiación:Cátedra de Anatomia Comparada, Fac. de Cie. Exact. Fis. Y Naturales, Univ. Nacional de Córdoba, Ave. Velez Sarsfield 299, 5000 Córdoba, Argentina
Alfred Wegener Inst. f. Polar und M., P.B. 120161, 27515 Bremerhaven, Germany
Depto. de Ciencias Biológicas, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
Palabras clave:benthic invertebrate; community structure; soft bottom; vertical distribution; zoobenthos; Antarctica, South Shetland Islands, King George Island, Potter Cove; Anthozoa; Ascidiacea; Laternula elliptioca; Molgula pedunculata; Pennatulidae; Vivalvia
Año:1998
Volumen:19
Número:2
Página de inicio:85
Página de fin:91
DOI: http://dx.doi.org/10.1007/s003000050218
Título revista:Polar Biology
Título revista abreviado:Polar Biol.
ISSN:07224060
CODEN:POBID
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07224060_v19_n2_p85_Sahade

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Citas:

---------- APA ----------
Sahade, R., Tatián, M., Kowalke, J., Kühne, S. & Esnal, G.B. (1998) . Benthic faunal associations on soft substrates at Potter Cove, King George Island, Antarctica. Polar Biology, 19(2), 85-91.
http://dx.doi.org/10.1007/s003000050218
---------- CHICAGO ----------
Sahade, R., Tatián, M., Kowalke, J., Kühne, S., Esnal, G.B. "Benthic faunal associations on soft substrates at Potter Cove, King George Island, Antarctica" . Polar Biology 19, no. 2 (1998) : 85-91.
http://dx.doi.org/10.1007/s003000050218
---------- MLA ----------
Sahade, R., Tatián, M., Kowalke, J., Kühne, S., Esnal, G.B. "Benthic faunal associations on soft substrates at Potter Cove, King George Island, Antarctica" . Polar Biology, vol. 19, no. 2, 1998, pp. 85-91.
http://dx.doi.org/10.1007/s003000050218
---------- VANCOUVER ----------
Sahade, R., Tatián, M., Kowalke, J., Kühne, S., Esnal, G.B. Benthic faunal associations on soft substrates at Potter Cove, King George Island, Antarctica. Polar Biol. 1998;19(2):85-91.
http://dx.doi.org/10.1007/s003000050218