Seasonal variability of metazooplankton in coastal sub-Antarctic waters (Beagle Channel)
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...
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2012
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17451000_v8_n4_p341_Aguirre http://hdl.handle.net/20.500.12110/paper_17451000_v8_n4_p341_Aguirre |
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paper:paper_17451000_v8_n4_p341_Aguirre2023-06-08T16:28:19Z Seasonal variability of metazooplankton in coastal sub-Antarctic waters (Beagle Channel) Aguirre, Gastón Ezequiel Capitanio, Fabiana Lía Lovrich, Gustavo Alejandro Esnal, Graciela Beatriz 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 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. Fil:Aguirre, G.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Capitanio, F.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Lovrich, G.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Esnal, G.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17451000_v8_n4_p341_Aguirre http://hdl.handle.net/20.500.12110/paper_17451000_v8_n4_p341_Aguirre |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 Aguirre, Gastón Ezequiel Capitanio, Fabiana Lía Lovrich, Gustavo Alejandro Esnal, Graciela Beatriz Seasonal variability of metazooplankton in coastal sub-Antarctic waters (Beagle Channel) |
| topic_facet |
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 |
| description |
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. |
| author |
Aguirre, Gastón Ezequiel Capitanio, Fabiana Lía Lovrich, Gustavo Alejandro Esnal, Graciela Beatriz |
| author_facet |
Aguirre, Gastón Ezequiel Capitanio, Fabiana Lía Lovrich, Gustavo Alejandro Esnal, Graciela Beatriz |
| author_sort |
Aguirre, Gastón Ezequiel |
| title |
Seasonal variability of metazooplankton in coastal sub-Antarctic waters (Beagle Channel) |
| title_short |
Seasonal variability of metazooplankton in coastal sub-Antarctic waters (Beagle Channel) |
| title_full |
Seasonal variability of metazooplankton in coastal sub-Antarctic waters (Beagle Channel) |
| title_fullStr |
Seasonal variability of metazooplankton in coastal sub-Antarctic waters (Beagle Channel) |
| title_full_unstemmed |
Seasonal variability of metazooplankton in coastal sub-Antarctic waters (Beagle Channel) |
| title_sort |
seasonal variability of metazooplankton in coastal sub-antarctic waters (beagle channel) |
| publishDate |
2012 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17451000_v8_n4_p341_Aguirre http://hdl.handle.net/20.500.12110/paper_17451000_v8_n4_p341_Aguirre |
| work_keys_str_mv |
AT aguirregastonezequiel seasonalvariabilityofmetazooplanktonincoastalsubantarcticwatersbeaglechannel AT capitaniofabianalia seasonalvariabilityofmetazooplanktonincoastalsubantarcticwatersbeaglechannel AT lovrichgustavoalejandro seasonalvariabilityofmetazooplanktonincoastalsubantarcticwatersbeaglechannel AT esnalgracielabeatriz seasonalvariabilityofmetazooplanktonincoastalsubantarcticwatersbeaglechannel |
| _version_ |
1768545346881847296 |