Zooplankton and their driving factors in a large subtropical river during low water periods

Autores
Jose, Susana Beatriz; Devercelli, Melina; Rojas Molina, Florencia Mercedes
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The composition, abundance and functional diversity of zooplankton from the main channel of the Middle Paraná River were studied. Monthly samples were collected in both ordinary drought periods (1977, 1978, 1981, 2007) and extraordinary drought ones (La Niña events 1971–1972, 1999–2000). A constant pattern of zooplankton structure was recorded from 1971 to 1981 characterised by a strong rotifer dominance. Changes were observed in the last two periods, with the planktonic larvae of Limnoperna fortunei as a new component of zooplankton. The abundance of zooplankton showed a significant interannual variability and a decreasing trend over time with the maximum values almost 100 times lower from 1999 onwards, mainly resulting from a decline in rotifer density. Cladocerans and copepods occurred with very low abundance and were similar across years. Bosmina and Bosminopsis showed a decreasing trend through time. Evidence was found of intrazooplanktonic competition between rotifers and cladocerans. Zooplankton and phytoplankton abundance presented similar trends, but the edible algal fraction (< 20 μm) showed a negative relation with Bosminidae, suggesting cladoceran control. In the last period, zooplankton changes were not associated with physical parameters (except flow velocity), nutrients or phytoplankton. The absence of a constant pattern and the causes of the declining trend of zooplankton abundance over time could be related to biotic interactions and multiple-stressors throughout the study.
Fil: Jose, Susana Beatriz. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas. Escuela Superior de Sanidad; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentina
Fil: Devercelli, Melina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentina
Fil: Rojas Molina, Florencia Mercedes. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentina
Materia
Long-Term Study
Microphagous Rotifers
Phytoplankton
Selective Filter Feeding Cladocerans
Zooplankton Abundance
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/31678
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/31678
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Zooplankton and their driving factors in a large subtropical river during low water periodsJose, Susana BeatrizDevercelli, MelinaRojas Molina, Florencia MercedesLong-Term StudyMicrophagous RotifersPhytoplanktonSelective Filter Feeding CladoceransZooplankton Abundancehttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The composition, abundance and functional diversity of zooplankton from the main channel of the Middle Paraná River were studied. Monthly samples were collected in both ordinary drought periods (1977, 1978, 1981, 2007) and extraordinary drought ones (La Niña events 1971–1972, 1999–2000). A constant pattern of zooplankton structure was recorded from 1971 to 1981 characterised by a strong rotifer dominance. Changes were observed in the last two periods, with the planktonic larvae of Limnoperna fortunei as a new component of zooplankton. The abundance of zooplankton showed a significant interannual variability and a decreasing trend over time with the maximum values almost 100 times lower from 1999 onwards, mainly resulting from a decline in rotifer density. Cladocerans and copepods occurred with very low abundance and were similar across years. Bosmina and Bosminopsis showed a decreasing trend through time. Evidence was found of intrazooplanktonic competition between rotifers and cladocerans. Zooplankton and phytoplankton abundance presented similar trends, but the edible algal fraction (< 20 μm) showed a negative relation with Bosminidae, suggesting cladoceran control. In the last period, zooplankton changes were not associated with physical parameters (except flow velocity), nutrients or phytoplankton. The absence of a constant pattern and the causes of the declining trend of zooplankton abundance over time could be related to biotic interactions and multiple-stressors throughout the study.Fil: Jose, Susana Beatriz. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas. Escuela Superior de Sanidad; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; ArgentinaFil: Devercelli, Melina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; ArgentinaFil: Rojas Molina, Florencia Mercedes. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; ArgentinaE Schweizerbartsche Verlags2014-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/31678Rojas Molina, Florencia Mercedes; Devercelli, Melina; Jose, Susana Beatriz; Zooplankton and their driving factors in a large subtropical river during low water periods; E Schweizerbartsche Verlags; Fundamental and Applied Limnology; 184; 2; 4-2014; 125-1391863-9135CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.schweizerbart.de/papers/fal/detail/184/82860/Zooplankton_and_their_driving_factors_in_a_large_subtropical_river_during_low_water_periods?af=searchinfo:eu-repo/semantics/altIdentifier/doi/10.1127/1863-9135/2014/0520info:eu-repo/semantics/altIdentifier/url/http://www.ingentaconnect.com/content/schweiz/fal/2014/00000184/00000002/art00004info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:35:57Zoai:ri.conicet.gov.ar:11336/31678instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:35:58.171CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Zooplankton and their driving factors in a large subtropical river during low water periods
title Zooplankton and their driving factors in a large subtropical river during low water periods
spellingShingle Zooplankton and their driving factors in a large subtropical river during low water periods
Jose, Susana Beatriz
Long-Term Study
Microphagous Rotifers
Phytoplankton
Selective Filter Feeding Cladocerans
Zooplankton Abundance
title_short Zooplankton and their driving factors in a large subtropical river during low water periods
title_full Zooplankton and their driving factors in a large subtropical river during low water periods
title_fullStr Zooplankton and their driving factors in a large subtropical river during low water periods
title_full_unstemmed Zooplankton and their driving factors in a large subtropical river during low water periods
title_sort Zooplankton and their driving factors in a large subtropical river during low water periods
dc.creator.none.fl_str_mv Jose, Susana Beatriz
Devercelli, Melina
Rojas Molina, Florencia Mercedes
author Jose, Susana Beatriz
author_facet Jose, Susana Beatriz
Devercelli, Melina
Rojas Molina, Florencia Mercedes
author_role author
author2 Devercelli, Melina
Rojas Molina, Florencia Mercedes
author2_role author
author
dc.subject.none.fl_str_mv Long-Term Study
Microphagous Rotifers
Phytoplankton
Selective Filter Feeding Cladocerans
Zooplankton Abundance
topic Long-Term Study
Microphagous Rotifers
Phytoplankton
Selective Filter Feeding Cladocerans
Zooplankton Abundance
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The composition, abundance and functional diversity of zooplankton from the main channel of the Middle Paraná River were studied. Monthly samples were collected in both ordinary drought periods (1977, 1978, 1981, 2007) and extraordinary drought ones (La Niña events 1971–1972, 1999–2000). A constant pattern of zooplankton structure was recorded from 1971 to 1981 characterised by a strong rotifer dominance. Changes were observed in the last two periods, with the planktonic larvae of Limnoperna fortunei as a new component of zooplankton. The abundance of zooplankton showed a significant interannual variability and a decreasing trend over time with the maximum values almost 100 times lower from 1999 onwards, mainly resulting from a decline in rotifer density. Cladocerans and copepods occurred with very low abundance and were similar across years. Bosmina and Bosminopsis showed a decreasing trend through time. Evidence was found of intrazooplanktonic competition between rotifers and cladocerans. Zooplankton and phytoplankton abundance presented similar trends, but the edible algal fraction (< 20 μm) showed a negative relation with Bosminidae, suggesting cladoceran control. In the last period, zooplankton changes were not associated with physical parameters (except flow velocity), nutrients or phytoplankton. The absence of a constant pattern and the causes of the declining trend of zooplankton abundance over time could be related to biotic interactions and multiple-stressors throughout the study.
Fil: Jose, Susana Beatriz. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas. Escuela Superior de Sanidad; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentina
Fil: Devercelli, Melina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentina
Fil: Rojas Molina, Florencia Mercedes. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto Nacional de Limnología. Universidad Nacional del Litoral. Instituto Nacional de Limnología; Argentina
description The composition, abundance and functional diversity of zooplankton from the main channel of the Middle Paraná River were studied. Monthly samples were collected in both ordinary drought periods (1977, 1978, 1981, 2007) and extraordinary drought ones (La Niña events 1971–1972, 1999–2000). A constant pattern of zooplankton structure was recorded from 1971 to 1981 characterised by a strong rotifer dominance. Changes were observed in the last two periods, with the planktonic larvae of Limnoperna fortunei as a new component of zooplankton. The abundance of zooplankton showed a significant interannual variability and a decreasing trend over time with the maximum values almost 100 times lower from 1999 onwards, mainly resulting from a decline in rotifer density. Cladocerans and copepods occurred with very low abundance and were similar across years. Bosmina and Bosminopsis showed a decreasing trend through time. Evidence was found of intrazooplanktonic competition between rotifers and cladocerans. Zooplankton and phytoplankton abundance presented similar trends, but the edible algal fraction (< 20 μm) showed a negative relation with Bosminidae, suggesting cladoceran control. In the last period, zooplankton changes were not associated with physical parameters (except flow velocity), nutrients or phytoplankton. The absence of a constant pattern and the causes of the declining trend of zooplankton abundance over time could be related to biotic interactions and multiple-stressors throughout the study.
publishDate 2014
dc.date.none.fl_str_mv 2014-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/31678
Rojas Molina, Florencia Mercedes; Devercelli, Melina; Jose, Susana Beatriz; Zooplankton and their driving factors in a large subtropical river during low water periods; E Schweizerbartsche Verlags; Fundamental and Applied Limnology; 184; 2; 4-2014; 125-139
1863-9135
CONICET Digital
CONICET
url http://hdl.handle.net/11336/31678
identifier_str_mv Rojas Molina, Florencia Mercedes; Devercelli, Melina; Jose, Susana Beatriz; Zooplankton and their driving factors in a large subtropical river during low water periods; E Schweizerbartsche Verlags; Fundamental and Applied Limnology; 184; 2; 4-2014; 125-139
1863-9135
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.schweizerbart.de/papers/fal/detail/184/82860/Zooplankton_and_their_driving_factors_in_a_large_subtropical_river_during_low_water_periods?af=search
info:eu-repo/semantics/altIdentifier/doi/10.1127/1863-9135/2014/0520
info:eu-repo/semantics/altIdentifier/url/http://www.ingentaconnect.com/content/schweiz/fal/2014/00000184/00000002/art00004
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv E Schweizerbartsche Verlags
publisher.none.fl_str_mv E Schweizerbartsche Verlags
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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