Estudio del fitoplancton aguas arriba y aguas abajo del embalse Casa de Piedra, río Colorado (La Pampa, Argentina)

Autores
Galea, M. J.; Bazán, Graciela Inés; Álvarez, S. B.; Martínez de Fabricius, A. L.
Año de publicación
2014
Idioma
español castellano
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In order to study the phytoplankton composition of the Colorado river, seasonal samples were taken during the period between May 2010 and April 2011. The study area is a natural border basin of the provinces of La Pampa and Río Negro and a transitional basin of Patagonia Argentina without records of previous studies. Selected sampling points are located upstream and downstream of the dam reservoir Casa de Piedra. In this study are presented preliminary results of phytoplankton composition analized in emplaced sites at 38º01’58”S-67º52’90”W to 288 msnm and 38°14’55’’ S-67º11’49’’W to 232 msnm. Samples were collected with plankton net of 20 μm mesh size and physicochemical variables were recorded simultaneously. Phytoplankton samples were observed in vivo and then fixed in 4% formalin and embedded in the herbarium of the SRFA UNLPam. As a result of the qualitative study so far hundred forty-one taxa were reported, of which twenty-nine belong to Cyanophyceae, fourty five to Chlorophyceae and fifty five to Bacillariophyceae. The index of similarity of Bray Curtis with S= 48 separates the sampled sites. The greatest similarity is between summer and autumn of 2011 with S = 66.66. Among the common species of Bacillariophyceae, with Aulacoseira granulata var. angustissima, Melosira varians, Fragilaria crotonensis, Cocconeis placentula var. euglypta, Epithemia sorex, Nitzschia sigma, N. sigmoidea and Cymatopleura solea were the highest percentage of occurrence at the study sites. Our results represent a great advance in the knowledge and distribution of algae in this region of the country.
Facultad de Ciencias Naturales y Museo
Materia
Ciencias Naturales
ficoflora
Agua Dulce
embalse
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-nd/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/56945
Acceder
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spelling Estudio del fitoplancton aguas arriba y aguas abajo del embalse Casa de Piedra, río Colorado (La Pampa, Argentina)Galea, M. J.Bazán, Graciela InésÁlvarez, S. B.Martínez de Fabricius, A. L.Ciencias NaturalesficofloraAgua DulceembalseIn order to study the phytoplankton composition of the Colorado river, seasonal samples were taken during the period between May 2010 and April 2011. The study area is a natural border basin of the provinces of La Pampa and Río Negro and a transitional basin of Patagonia Argentina without records of previous studies. Selected sampling points are located upstream and downstream of the dam reservoir Casa de Piedra. In this study are presented preliminary results of phytoplankton composition analized in emplaced sites at 38º01’58”S-67º52’90”W to 288 msnm and 38°14’55’’ S-67º11’49’’W to 232 msnm. Samples were collected with plankton net of 20 μm mesh size and physicochemical variables were recorded simultaneously. Phytoplankton samples were observed in vivo and then fixed in 4% formalin and embedded in the herbarium of the SRFA UNLPam. As a result of the qualitative study so far hundred forty-one taxa were reported, of which twenty-nine belong to Cyanophyceae, fourty five to Chlorophyceae and fifty five to Bacillariophyceae. The index of similarity of Bray Curtis with S= 48 separates the sampled sites. The greatest similarity is between summer and autumn of 2011 with S = 66.66. Among the common species of Bacillariophyceae, with Aulacoseira granulata var. angustissima, Melosira varians, Fragilaria crotonensis, Cocconeis placentula var. euglypta, Epithemia sorex, Nitzschia sigma, N. sigmoidea and Cymatopleura solea were the highest percentage of occurrence at the study sites. Our results represent a great advance in the knowledge and distribution of algae in this region of the country.Facultad de Ciencias Naturales y Museo2014info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf287-300http://sedici.unlp.edu.ar/handle/10915/56945spainfo:eu-repo/semantics/altIdentifier/url/http://www.bacuatica.org/index.php/bacuatica/article/view/42info:eu-repo/semantics/altIdentifier/issn/1668-4869info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T16:47:40Zoai:sedici.unlp.edu.ar:10915/56945Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 16:47:40.392SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Estudio del fitoplancton aguas arriba y aguas abajo del embalse Casa de Piedra, río Colorado (La Pampa, Argentina)
title Estudio del fitoplancton aguas arriba y aguas abajo del embalse Casa de Piedra, río Colorado (La Pampa, Argentina)
spellingShingle Estudio del fitoplancton aguas arriba y aguas abajo del embalse Casa de Piedra, río Colorado (La Pampa, Argentina)
Galea, M. J.
Ciencias Naturales
ficoflora
Agua Dulce
embalse
title_short Estudio del fitoplancton aguas arriba y aguas abajo del embalse Casa de Piedra, río Colorado (La Pampa, Argentina)
title_full Estudio del fitoplancton aguas arriba y aguas abajo del embalse Casa de Piedra, río Colorado (La Pampa, Argentina)
title_fullStr Estudio del fitoplancton aguas arriba y aguas abajo del embalse Casa de Piedra, río Colorado (La Pampa, Argentina)
title_full_unstemmed Estudio del fitoplancton aguas arriba y aguas abajo del embalse Casa de Piedra, río Colorado (La Pampa, Argentina)
title_sort Estudio del fitoplancton aguas arriba y aguas abajo del embalse Casa de Piedra, río Colorado (La Pampa, Argentina)
dc.creator.none.fl_str_mv Galea, M. J.
Bazán, Graciela Inés
Álvarez, S. B.
Martínez de Fabricius, A. L.
author Galea, M. J.
author_facet Galea, M. J.
Bazán, Graciela Inés
Álvarez, S. B.
Martínez de Fabricius, A. L.
author_role author
author2 Bazán, Graciela Inés
Álvarez, S. B.
Martínez de Fabricius, A. L.
author2_role author
author
author
dc.subject.none.fl_str_mv Ciencias Naturales
ficoflora
Agua Dulce
embalse
topic Ciencias Naturales
ficoflora
Agua Dulce
embalse
dc.description.none.fl_txt_mv In order to study the phytoplankton composition of the Colorado river, seasonal samples were taken during the period between May 2010 and April 2011. The study area is a natural border basin of the provinces of La Pampa and Río Negro and a transitional basin of Patagonia Argentina without records of previous studies. Selected sampling points are located upstream and downstream of the dam reservoir Casa de Piedra. In this study are presented preliminary results of phytoplankton composition analized in emplaced sites at 38º01’58”S-67º52’90”W to 288 msnm and 38°14’55’’ S-67º11’49’’W to 232 msnm. Samples were collected with plankton net of 20 μm mesh size and physicochemical variables were recorded simultaneously. Phytoplankton samples were observed in vivo and then fixed in 4% formalin and embedded in the herbarium of the SRFA UNLPam. As a result of the qualitative study so far hundred forty-one taxa were reported, of which twenty-nine belong to Cyanophyceae, fourty five to Chlorophyceae and fifty five to Bacillariophyceae. The index of similarity of Bray Curtis with S= 48 separates the sampled sites. The greatest similarity is between summer and autumn of 2011 with S = 66.66. Among the common species of Bacillariophyceae, with Aulacoseira granulata var. angustissima, Melosira varians, Fragilaria crotonensis, Cocconeis placentula var. euglypta, Epithemia sorex, Nitzschia sigma, N. sigmoidea and Cymatopleura solea were the highest percentage of occurrence at the study sites. Our results represent a great advance in the knowledge and distribution of algae in this region of the country.
Facultad de Ciencias Naturales y Museo
description In order to study the phytoplankton composition of the Colorado river, seasonal samples were taken during the period between May 2010 and April 2011. The study area is a natural border basin of the provinces of La Pampa and Río Negro and a transitional basin of Patagonia Argentina without records of previous studies. Selected sampling points are located upstream and downstream of the dam reservoir Casa de Piedra. In this study are presented preliminary results of phytoplankton composition analized in emplaced sites at 38º01’58”S-67º52’90”W to 288 msnm and 38°14’55’’ S-67º11’49’’W to 232 msnm. Samples were collected with plankton net of 20 μm mesh size and physicochemical variables were recorded simultaneously. Phytoplankton samples were observed in vivo and then fixed in 4% formalin and embedded in the herbarium of the SRFA UNLPam. As a result of the qualitative study so far hundred forty-one taxa were reported, of which twenty-nine belong to Cyanophyceae, fourty five to Chlorophyceae and fifty five to Bacillariophyceae. The index of similarity of Bray Curtis with S= 48 separates the sampled sites. The greatest similarity is between summer and autumn of 2011 with S = 66.66. Among the common species of Bacillariophyceae, with Aulacoseira granulata var. angustissima, Melosira varians, Fragilaria crotonensis, Cocconeis placentula var. euglypta, Epithemia sorex, Nitzschia sigma, N. sigmoidea and Cymatopleura solea were the highest percentage of occurrence at the study sites. Our results represent a great advance in the knowledge and distribution of algae in this region of the country.
publishDate 2014
dc.date.none.fl_str_mv 2014
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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info:ar-repo/semantics/articulo
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status_str publishedVersion
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info:eu-repo/semantics/altIdentifier/issn/1668-4869
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
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repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
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