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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ftunibueairesbd:paper:paper_01427873_v35_n3_p610_Thompson 2023-05-15T13:50:11+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, Gustavo Ariel Alder, Viviana A. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01427873_v35_n3_p610_Thompson https://hdl.handle.net/20.500.12110/paper_01427873_v35_n3_p610_Thompson unknown https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01427873_v35_n3_p610_Thompson http://hdl.handle.net/20.500.12110/paper_01427873_v35_n3_p610_Thompson 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 2013 ftunibueairesbd https://doi.org/20.500.12110/paper_01427873_v35_n3_p610_Thompson 2023-02-16T02:23:33Z 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. Other/Unknown Material Antarc* Antarctic Copepods Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) Antarctic Argentina The Antarctic |
institution |
Open Polar |
collection |
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
op_collection_id |
ftunibueairesbd |
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, Gustavo Ariel Alder, Viviana 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. |
author |
Thompson, Gustavo Ariel Alder, Viviana A. |
author_facet |
Thompson, Gustavo Ariel Alder, Viviana A. |
author_sort |
Thompson, Gustavo Ariel |
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://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01427873_v35_n3_p610_Thompson https://hdl.handle.net/20.500.12110/paper_01427873_v35_n3_p610_Thompson |
geographic |
Antarctic Argentina The Antarctic |
geographic_facet |
Antarctic Argentina The Antarctic |
genre |
Antarc* Antarctic Copepods |
genre_facet |
Antarc* Antarctic Copepods |
op_relation |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01427873_v35_n3_p610_Thompson http://hdl.handle.net/20.500.12110/paper_01427873_v35_n3_p610_Thompson |
op_doi |
https://doi.org/20.500.12110/paper_01427873_v35_n3_p610_Thompson |
_version_ |
1766253178906476544 |