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Fitoplancton del embalse Yacyretá (Argentina-Paraguay) a una década de su llenado

Authors: Meichtry de Zaburlín, Norma; Vogler, Roberto Eugenio; Llano, Víctor Martín; Martens, Irmgard Sandra Mabel;

Fitoplancton del embalse Yacyretá (Argentina-Paraguay) a una década de su llenado

Abstract

Se estudió la estructura y dinámica del fitoplancton del embalse Yacyretá en relación con las principalesvariables limnológicas durante el periodo diciembre de 2004 a noviembre de 2005, a 10 años del llenado del embalse.Las muestras cualitativas y cuantitativas fueron recolectadas en 6 estaciones, previamente seleccionadas siguiendo uncriterio de zonación longitudinal. Se analizó la densidad, composición, riqueza, diversidad específica, equitatividad ygrupos taxonómicos dominantes. Durante el período de estudio, el embalse Yacyretá no presentó estratificación térmicay la concentración de oxígeno disuelto fue alta en toda la columna de agua. Se registraron 200 especies distribuidas en 9clases. El número de especies por muestra osciló entre 14 y 45 taxa y la diversidad específica entre 1.55 y 4.61 bits. Ladensidad varió entre 66 y 10 060 ind/ml, con dominancia de Cryptophyceae y Bacillariophyceae en las distintas regionesdel embalse. Al inicio del otoño y final de la primavera, se registró un aumento en la densidad de Cyanobacteria en lasestaciones con mayor tiempo de residencia del agua. La composición y densidad del fitoplancton presentó una marcadavariación espacial y temporal determinada principalmente, por las variaciones del régimen hidrosedimentológico delrío Paraná.

Country
Argentina
Keywords

Spatial-temporal variation, blooms, Florecimiento, Paraná River, Variables ambientales, Blooms, QH301-705.5, variables ambientales, florecimiento, variación espacio-temporal, floraciones, Environmental variables, río Paraná, variables limnológicas, Variación espacio-temporal, spatial-temporal variation, Zoología, Biology (General), Río Paraná, environmental variables

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
Average
Average
Average
Green
gold