Structure, abundance and biomass size spectra of copepods and other zooplankton communities in upper waters of the Southwestern Atlantic Ocean during summer
Little attention has been paid to small copepods and other zooplankton inhabiting pelagic ecosystems of the Southwestern Atlantic Ocean under the influence of the Antarctic Circumpolar Current circulation, despite their important role in the trophic chain and fisheries. This study gives a synoptic v...
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ftunbuenosairrdi:oai:RDI UBA:artiaex:paper_01427873_v35_n3_p610_Thompson_oai 2023-05-15T13:54:03+02:00 Structure, abundance and biomass size spectra of copepods and other zooplankton communities in upper waters of the Southwestern Atlantic Ocean during summer Thompson, G.A. Dinofrio, E.O. Alder, V.A. 2013 application/pdf https://hdl.handle.net/20.500.12110/paper_01427873_v35_n3_p610_Thompson http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_01427873_v35_n3_p610_Thompson_oai unknown http://hdl.handle.net/20.500.12110/paper_01427873_v35_n3_p610_Thompson http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_01427873_v35_n3_p610_Thompson_oai info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar CC-BY J. Plankton Res. 2013;35(3):610-629 copepods normalized biomass size spectra size structure Southwestern Atlantic zooplankton abundance biomass chlorophyll community structure crustacean population density population distribution summer trophic level upper ocean Atlantic Ocean Atlantic Ocean (Southwest) Brazil-Malvinas Confluence info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion 2013 ftunbuenosairrdi https://doi.org/20.500.12110/paper_01427873_v35_n3_p610_Thompson 2020-10-22T00:10:07Z Little attention has been paid to small copepods and other zooplankton inhabiting pelagic ecosystems of the Southwestern Atlantic Ocean under the influence of the Antarctic Circumpolar Current circulation, despite their important role in the trophic chain and fisheries. This study gives a synoptic view (January 2001) of the micro and mesoplankton size fractions and normalized biomass size spectra (NBSS) in upper waters of five different ecological domains (shelf and oceanic Subantarctic and Antarctic waters) including the Brazil-Malvinas confluence (BMC). Copepods were always the main component of the zooplankton; the <300-μm fraction represented between 70 and 99% in terms of numbers and from 20 to 88% in terms of biomass. Other zooplankton contributed with <40% to total zooplankton densities, though showing some biomass peaks (>50%). Chlorophyll a, sea surface temperature and salinity were the environmental variables that best explained the distribution trend of zooplankton, mainly that of the <300-μm fraction. For all the domains, NBSS revealed flat slopes (-0.6 to-1), suggesting a higher proportion of large organisms than expected at equilibrium. A dome-shape feature was detected in the BMC. Total biomass and trophic levels of the system were related to the composition of the community and the hydrological conditions of the domains covered. © 2013 The Author. Fil:Thompson, G.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Alder, V.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Article in Journal/Newspaper Antarc* Antarctic Copepods Repositorio Digital Institucional - Universidad de Buenos Aires (RDI UBA) Antarctic The Antarctic Argentina |
institution |
Open Polar |
collection |
Repositorio Digital Institucional - Universidad de Buenos Aires (RDI UBA) |
op_collection_id |
ftunbuenosairrdi |
language |
unknown |
topic |
copepods normalized biomass size spectra size structure Southwestern Atlantic zooplankton abundance biomass chlorophyll community structure crustacean population density population distribution summer trophic level upper ocean Atlantic Ocean Atlantic Ocean (Southwest) Brazil-Malvinas Confluence |
spellingShingle |
copepods normalized biomass size spectra size structure Southwestern Atlantic zooplankton abundance biomass chlorophyll community structure crustacean population density population distribution summer trophic level upper ocean Atlantic Ocean Atlantic Ocean (Southwest) Brazil-Malvinas Confluence Thompson, G.A. Dinofrio, E.O. Alder, V.A. Structure, abundance and biomass size spectra of copepods and other zooplankton communities in upper waters of the Southwestern Atlantic Ocean during summer |
topic_facet |
copepods normalized biomass size spectra size structure Southwestern Atlantic zooplankton abundance biomass chlorophyll community structure crustacean population density population distribution summer trophic level upper ocean Atlantic Ocean Atlantic Ocean (Southwest) Brazil-Malvinas Confluence |
description |
Little attention has been paid to small copepods and other zooplankton inhabiting pelagic ecosystems of the Southwestern Atlantic Ocean under the influence of the Antarctic Circumpolar Current circulation, despite their important role in the trophic chain and fisheries. This study gives a synoptic view (January 2001) of the micro and mesoplankton size fractions and normalized biomass size spectra (NBSS) in upper waters of five different ecological domains (shelf and oceanic Subantarctic and Antarctic waters) including the Brazil-Malvinas confluence (BMC). Copepods were always the main component of the zooplankton; the <300-μm fraction represented between 70 and 99% in terms of numbers and from 20 to 88% in terms of biomass. Other zooplankton contributed with <40% to total zooplankton densities, though showing some biomass peaks (>50%). Chlorophyll a, sea surface temperature and salinity were the environmental variables that best explained the distribution trend of zooplankton, mainly that of the <300-μm fraction. For all the domains, NBSS revealed flat slopes (-0.6 to-1), suggesting a higher proportion of large organisms than expected at equilibrium. A dome-shape feature was detected in the BMC. Total biomass and trophic levels of the system were related to the composition of the community and the hydrological conditions of the domains covered. © 2013 The Author. Fil:Thompson, G.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Alder, V.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. |
format |
Article in Journal/Newspaper |
author |
Thompson, G.A. Dinofrio, E.O. Alder, V.A. |
author_facet |
Thompson, G.A. Dinofrio, E.O. Alder, V.A. |
author_sort |
Thompson, G.A. |
title |
Structure, abundance and biomass size spectra of copepods and other zooplankton communities in upper waters of the Southwestern Atlantic Ocean during summer |
title_short |
Structure, abundance and biomass size spectra of copepods and other zooplankton communities in upper waters of the Southwestern Atlantic Ocean during summer |
title_full |
Structure, abundance and biomass size spectra of copepods and other zooplankton communities in upper waters of the Southwestern Atlantic Ocean during summer |
title_fullStr |
Structure, abundance and biomass size spectra of copepods and other zooplankton communities in upper waters of the Southwestern Atlantic Ocean during summer |
title_full_unstemmed |
Structure, abundance and biomass size spectra of copepods and other zooplankton communities in upper waters of the Southwestern Atlantic Ocean during summer |
title_sort |
structure, abundance and biomass size spectra of copepods and other zooplankton communities in upper waters of the southwestern atlantic ocean during summer |
publishDate |
2013 |
url |
https://hdl.handle.net/20.500.12110/paper_01427873_v35_n3_p610_Thompson http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_01427873_v35_n3_p610_Thompson_oai |
geographic |
Antarctic The Antarctic Argentina |
geographic_facet |
Antarctic The Antarctic Argentina |
genre |
Antarc* Antarctic Copepods |
genre_facet |
Antarc* Antarctic Copepods |
op_source |
J. Plankton Res. 2013;35(3):610-629 |
op_relation |
http://hdl.handle.net/20.500.12110/paper_01427873_v35_n3_p610_Thompson http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_01427873_v35_n3_p610_Thompson_oai |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/20.500.12110/paper_01427873_v35_n3_p610_Thompson |
_version_ |
1766259558511017984 |