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Abstract:

The aim of this study was to analyse the variability in the species composition and abundance of the metazooplankton community in different coastal areas of the Beagle Channel (southern tip of South America) during a seasonal cycle. Sampling was conducted during November (spring) 2005, March (summer), June (autumn) and September (winter) 2006 at 12 coastal stations. Copepods were the most abundant group throughout the study, and their assemblages were composed of a mixture of species typical of the south-western Atlantic, the south-eastern Pacific and the Southern Ocean. Among them, Oithona similis, Ctenocalanus citer and Drepanopus forcipatus were the dominant species. The copepod Acartia tonsa was the only taxon that displayed a spatial pattern of abundance, showing higher densities in areas with lower salinities. The community structure showed a strong temporal pattern. The metazooplankton community in March and June was mainly composed of copepods, while in November and September the community showed a greater diversity. In these two months high densities of meroplanktonic larvae were found, in coincidence with higher chlorophyll-a concentration. This temporal pattern seems to be more dependent on primary production than on physical factors such as temperature or salinity. The absence of a clear spatial pattern may suggest that the studied area of the Beagle Channel behaves as a semi-enclosed water body. © 2012 Copyright Taylor and Francis Group, LLC.

Registro:

Documento: Artículo
Título:Seasonal variability of metazooplankton in coastal sub-Antarctic waters (Beagle Channel)
Autor:Aguirre, G.E.; Capitanio, F.L.; Lovrich, G.A.; Esnal, G.B.
Filiación:Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany
Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina
Centro Austral de Investigaciones Científicas, Ushuaia, Tierra del Fuego, Argentina
Palabras clave:Beagle Channel; community structure; sub-Antarctic; Zooplankton; abundance; community structure; dominance; population density; primary production; sea surface salinity; sea surface temperature; seasonal variation; spatiotemporal analysis; zooplankton; Beagle Channel; Southern Ocean; Acartia tonsa; Copepoda; Ctenocalanus citer; Drepanopus forcipatus; Oithona similis
Año:2012
Volumen:8
Número:4
Página de inicio:341
Página de fin:353
DOI: http://dx.doi.org/10.1080/17451000.2011.627922
Título revista:Marine Biology Research
Título revista abreviado:Mar. Biol. Res.
ISSN:17451000
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17451000_v8_n4_p341_Aguirre

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Citas:

---------- APA ----------
Aguirre, G.E., Capitanio, F.L., Lovrich, G.A. & Esnal, G.B. (2012) . Seasonal variability of metazooplankton in coastal sub-Antarctic waters (Beagle Channel). Marine Biology Research, 8(4), 341-353.
http://dx.doi.org/10.1080/17451000.2011.627922
---------- CHICAGO ----------
Aguirre, G.E., Capitanio, F.L., Lovrich, G.A., Esnal, G.B. "Seasonal variability of metazooplankton in coastal sub-Antarctic waters (Beagle Channel)" . Marine Biology Research 8, no. 4 (2012) : 341-353.
http://dx.doi.org/10.1080/17451000.2011.627922
---------- MLA ----------
Aguirre, G.E., Capitanio, F.L., Lovrich, G.A., Esnal, G.B. "Seasonal variability of metazooplankton in coastal sub-Antarctic waters (Beagle Channel)" . Marine Biology Research, vol. 8, no. 4, 2012, pp. 341-353.
http://dx.doi.org/10.1080/17451000.2011.627922
---------- VANCOUVER ----------
Aguirre, G.E., Capitanio, F.L., Lovrich, G.A., Esnal, G.B. Seasonal variability of metazooplankton in coastal sub-Antarctic waters (Beagle Channel). Mar. Biol. Res. 2012;8(4):341-353.
http://dx.doi.org/10.1080/17451000.2011.627922