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Cyanobacteria y Cianotoxinas en una laguna somera del Nordeste de Argentina

Authors: Forastier, Marina E.; Zalocar, Yolanda; Sedan, Daniela Yazmine; Andrinolo, Darío;

Cyanobacteria y Cianotoxinas en una laguna somera del Nordeste de Argentina

Abstract

El objetivo de este trabajo fue analizar las variaciones temporales del fitoplancton e identificar y cuantificar las cianobacterias y cianotoxinas de la laguna Aeroclub (27º28'S-58º43'W), entre octubre de 2005 y mayo de 2008. La densidad del fitoplancton osciló entre 59 y 7113 ind.m1· 1 y estuvo representado por ocho grupos taxonómicos, con dominancia de Cyanobacteria > Chlorophyceae > Cryptophyceae. Las cianobacterias predominaron durante la mayor parte del estudio (48% de los muestreos) con un rango de variación entre 3 (25-10-07) y 6741 ind.ml-1 (17-03-06). Su densidad presentó correlación estadísticamente significativa con la temperatura del agua (r,= 0,511; p < 0,05; g.l. = 56). La identificación de cianotoxinas se realizó con material concentrado de Microcystis aeruginosa (Kütz.) Kütz. y M. wesenbergii (Kom.) Kom. Los resultados del análisis en HPLC mostraron cuatro variantes de microcistinas: LR, RR, YR y [D-Leu1] LR. Durante el estudio, en tres ocasiones Microcystis (M. aeruginosa + M. wesenbergii) superaron el límite máximo establecido por la OMS para un Nivel de alerta I (20000 cél.ml- 1 ). Debido a la escasa acción antrópica en suelos circundantes de la laguna y, la baja concentración de nutrientes detectada en sus aguas, es posible que las floraciones de cianobacterias no superen este nivel de alerta. Sin embargo, cambios en sus niveles tróficos u otras modificaciones antrópicas podrían alterar el actual equilibrio ecológico.

Country
Argentina
Keywords

FITOPLANCTON, M. wesenbergii, MICROCYSTIS AERUGINOSA, Nordeste argentino, CUENCA DEL RIACHUELO, Química, Fitoplancton, PROVINCIA DE CORRIENTES, Fitop lancton, Microcistinas, MICROCISTINAS, Provincia de Corrientes, M. WESENBERGII, NORDESTE ARGENTINO, https://purl.org/becyt/ford/1.6, Cuenca del Riachuelo, Microcystis aeruginosa, https://purl.org/becyt/ford/1

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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!
0
Average
Average
Average
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bronze