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dc.contributor.author
Frutos, Santa Margarita
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dc.contributor.author
Poi, Alicia Susana G.
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dc.contributor.author
Neiff, Juan Jose
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dc.date.available
2018-08-16T19:48:31Z
dc.date.issued
2006-11
dc.identifier.citation
Frutos, Santa Margarita; Poi, Alicia Susana G.; Neiff, Juan Jose; Zooplankton of the Paraguay River: A comparison between sections and hydrological phases; EDP Sciences; Annales de Limnologie-International Journal of Limnology; 42; 4; 11-2006; 277-288
dc.identifier.issn
0003-4088
dc.identifier.uri
http://hdl.handle.net/11336/56007
dc.description.abstract
Changes in the abundance, species richness and species diversity of zooplankton were studied in the Paraguay River. Fifty-nine sites were studied at two hydrological phases between Porto Cáceres (16°03'S-26°23'W) and the confluence with the Paraná (Argentine, 26°53'S-58°23'W), representing a distance of 2270 km. Zooplankton densities varied between 1 and 60 ind.l-1 at high water and between 11 and 100 ind.l-1 at low water. Multiple regression analysis revealed that the hydrological phase explained 64% of the variability in zooplankton density. Surveys found 196 taxa in the Paraguay River (including both the main course and its floodplain). The greater species richness was registered in the upper section. There were significant differences in the species richness and species diversity of Rotifera (Monogononta) between hydrological phases. In the main channel, the hydrological phase explained 54% of variability in species richness, whereas water temperature and electric conductivity explained less than 22% of the variability in species diversity. Rotifera was the most abundant group in both study periods. Despite the total number of species registered in the main channel, only six planktonic genera dominated the zooplankton assemblage (Polyarthra, Synchaeta, Filinia, Keratella and Lecane). The most abundant cladocerans belonged to Bosminidae (Bosminopsis sp.) and the dominant copepods were in the nauplii and juveniles stages. A longitudinal pattern in dominant taxa was not defined at high water. At low water, three species-site groups were separated in relation to environmental variables. The pulsing of the river determines the degree of connectivity with the floodplain and local features had a greater effect on zooplankton assemblages than large-scale landscape patterns.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Hydrologic Phases
dc.subject
Paraguay River
dc.subject
Zooplankton Abundance
dc.subject
Zooplankton Composition
dc.subject.classification
Ecología
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Zooplankton of the Paraguay River: A comparison between sections and hydrological phases
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-07-11T14:12:09Z
dc.journal.volume
42
dc.journal.number
4
dc.journal.pagination
277-288
dc.journal.pais
Francia
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dc.journal.ciudad
Paris
dc.description.fil
Fil: Frutos, Santa Margarita. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina. Universidad Nacional del Nordeste. Facultad de Cs.exactas Naturales y Agrimensura. Departamento de Agrimensura; Argentina
dc.description.fil
Fil: Poi, Alicia Susana G.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina. Universidad Nacional del Nordeste. Facultad de Cs.exactas Naturales y Agrimensura. Departamento de Agrimensura; Argentina
dc.description.fil
Fil: Neiff, Juan Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina
dc.journal.title
Annales de Limnologie-International Journal of Limnology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/limn/2006028
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.limnology-journal.org/articles/limn/abs/2006/04/limno200642p277/limno200642p277.html
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