Microzooplankton and tintinnid species-specific assemblage structures: Patterns of distribution and year-to-year variations in the Weddell Sea (Antarctica)

Silicoflagellates, large heterotrophic dinoflagellates, radiolarians, tintinnids and micro-crustaceans were counted in 72 screened (15 μm) samples retrieved at 0-150 m from the Weddell Sea in January 1989. Tintinnid species were identified and biomass estimates were carried out for all groups on the...

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Detalles Bibliográficos
Autores principales:	Boltovskoy, Demetrio, Alder, Viviana A.
Publicado:	1992
Materias:	dinoflagellate distribution plankton assemblage protozoan Radiolaria tintinnid year-to-year variations Weddell Sea
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01427873_v14_n10_p1405_Boltovskoy http://hdl.handle.net/20.500.12110/paper_01427873_v14_n10_p1405_Boltovskoy
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_01427873_v14_n10_p1405_Boltovskoy
record_format	dspace
spelling	paper:paper_01427873_v14_n10_p1405_Boltovskoy2023-06-08T15:11:28Z Microzooplankton and tintinnid species-specific assemblage structures: Patterns of distribution and year-to-year variations in the Weddell Sea (Antarctica) Boltovskoy, Demetrio Alder, Viviana A. dinoflagellate distribution plankton assemblage protozoan Radiolaria tintinnid year-to-year variations Weddell Sea Silicoflagellates, large heterotrophic dinoflagellates, radiolarians, tintinnids and micro-crustaceans were counted in 72 screened (15 μm) samples retrieved at 0-150 m from the Weddell Sea in January 1989. Tintinnid species were identified and biomass estimates were carried out for all groups on the basis of measurements of cell dimensions. Dinoflagellates dominated the micro-heterotrophic community at all stations and depths (65% of overall microzooplanktonic carbon in the 0-150 m interval), followed by the tintinnids (18%), microcrustaceans (16%) and radiolarians (1%). All groups, with the exception of silicoflagellates, peaked noticeably in the vicinity of the southern end of the transect (76-77°S). Relationships between concentrations of chlorophyll a and microzooplanktonic biomass were present, yet not altogether consistent, but both phyto- and microzooplankton seemed to generally respond to regional enhancements associated with the ice edge. Comparison with similar Weddell and Weddell-Scotia data retrieved in February-March 1987 and November 1988-December 1989, respectively, are highly coherent in terms of microplanktonic abundances, their geographic and vertical distribution patterns, and the specific make-up and distribution of tintinnid assemblages. Analyses of the oral diameters of tintinnid morphotypes suggest that the latitudinal and vertical distribution of their five dominant taxa (which account for >90% of all individuals) is structured so as to maximize resource partitioning. © 1992 Oxford University Press. Fil:Boltovskoy, D. 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. 1992 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01427873_v14_n10_p1405_Boltovskoy http://hdl.handle.net/20.500.12110/paper_01427873_v14_n10_p1405_Boltovskoy
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	dinoflagellate distribution plankton assemblage protozoan Radiolaria tintinnid year-to-year variations Weddell Sea
spellingShingle	dinoflagellate distribution plankton assemblage protozoan Radiolaria tintinnid year-to-year variations Weddell Sea Boltovskoy, Demetrio Alder, Viviana A. Microzooplankton and tintinnid species-specific assemblage structures: Patterns of distribution and year-to-year variations in the Weddell Sea (Antarctica)
topic_facet	dinoflagellate distribution plankton assemblage protozoan Radiolaria tintinnid year-to-year variations Weddell Sea
description	Silicoflagellates, large heterotrophic dinoflagellates, radiolarians, tintinnids and micro-crustaceans were counted in 72 screened (15 μm) samples retrieved at 0-150 m from the Weddell Sea in January 1989. Tintinnid species were identified and biomass estimates were carried out for all groups on the basis of measurements of cell dimensions. Dinoflagellates dominated the micro-heterotrophic community at all stations and depths (65% of overall microzooplanktonic carbon in the 0-150 m interval), followed by the tintinnids (18%), microcrustaceans (16%) and radiolarians (1%). All groups, with the exception of silicoflagellates, peaked noticeably in the vicinity of the southern end of the transect (76-77°S). Relationships between concentrations of chlorophyll a and microzooplanktonic biomass were present, yet not altogether consistent, but both phyto- and microzooplankton seemed to generally respond to regional enhancements associated with the ice edge. Comparison with similar Weddell and Weddell-Scotia data retrieved in February-March 1987 and November 1988-December 1989, respectively, are highly coherent in terms of microplanktonic abundances, their geographic and vertical distribution patterns, and the specific make-up and distribution of tintinnid assemblages. Analyses of the oral diameters of tintinnid morphotypes suggest that the latitudinal and vertical distribution of their five dominant taxa (which account for >90% of all individuals) is structured so as to maximize resource partitioning. © 1992 Oxford University Press.
author	Boltovskoy, Demetrio Alder, Viviana A.
author_facet	Boltovskoy, Demetrio Alder, Viviana A.
author_sort	Boltovskoy, Demetrio
title	Microzooplankton and tintinnid species-specific assemblage structures: Patterns of distribution and year-to-year variations in the Weddell Sea (Antarctica)
title_short	Microzooplankton and tintinnid species-specific assemblage structures: Patterns of distribution and year-to-year variations in the Weddell Sea (Antarctica)
title_full	Microzooplankton and tintinnid species-specific assemblage structures: Patterns of distribution and year-to-year variations in the Weddell Sea (Antarctica)
title_fullStr	Microzooplankton and tintinnid species-specific assemblage structures: Patterns of distribution and year-to-year variations in the Weddell Sea (Antarctica)
title_full_unstemmed	Microzooplankton and tintinnid species-specific assemblage structures: Patterns of distribution and year-to-year variations in the Weddell Sea (Antarctica)
title_sort	microzooplankton and tintinnid species-specific assemblage structures: patterns of distribution and year-to-year variations in the weddell sea (antarctica)
publishDate	1992
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01427873_v14_n10_p1405_Boltovskoy http://hdl.handle.net/20.500.12110/paper_01427873_v14_n10_p1405_Boltovskoy
work_keys_str_mv	AT boltovskoydemetrio microzooplanktonandtintinnidspeciesspecificassemblagestructurespatternsofdistributionandyeartoyearvariationsintheweddellseaantarctica AT aldervivianaa microzooplanktonandtintinnidspeciesspecificassemblagestructurespatternsofdistributionandyeartoyearvariationsintheweddellseaantarctica
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Microzooplankton and tintinnid species-specific assemblage structures: Patterns of distribution and year-to-year variations in the Weddell Sea (Antarctica)

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