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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Autores principales: Aguirre, G.E., Capitanio, F.L., Lovrich, G.A., Esnal, G.B.
Formato: JOUR
Materias:
Beagle Channel
community structure
sub-Antarctic
Zooplankton
abundance
dominance
population density
primary production
sea surface salinity
sea surface temperature
seasonal variation
spatiotemporal analysis
zooplankton
Southern Ocean
Acartia tonsa
Copepoda
Ctenocalanus citer
Drepanopus forcipatus
Oithona similis
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_17451000_v8_n4_p341_Aguirre
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_17451000_v8_n4_p341_Aguirre
record_format dspace
spelling todo:paper_17451000_v8_n4_p341_Aguirre2023-10-03T16:31:54Z Seasonal variability of metazooplankton in coastal sub-Antarctic waters (Beagle Channel) Aguirre, G.E. Capitanio, F.L. Lovrich, G.A. Esnal, G.B. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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, G.E.
Capitanio, F.L.
Lovrich, G.A.
Esnal, G.B.
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.
format JOUR
author Aguirre, G.E.
Capitanio, F.L.
Lovrich, G.A.
Esnal, G.B.
author_facet Aguirre, G.E.
Capitanio, F.L.
Lovrich, G.A.
Esnal, G.B.
author_sort Aguirre, G.E.
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)
url http://hdl.handle.net/20.500.12110/paper_17451000_v8_n4_p341_Aguirre
work_keys_str_mv AT aguirrege seasonalvariabilityofmetazooplanktonincoastalsubantarcticwatersbeaglechannel
AT capitaniofl seasonalvariabilityofmetazooplanktonincoastalsubantarcticwatersbeaglechannel
AT lovrichga seasonalvariabilityofmetazooplanktonincoastalsubantarcticwatersbeaglechannel
AT esnalgb seasonalvariabilityofmetazooplanktonincoastalsubantarcticwatersbeaglechannel
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