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Rev. luna azul ; (31): 17-25, jul.-dic. 2010. ilus, tab
Article in Spanish | LILACS | ID: lil-635698

ABSTRACT

En el río Cesar, que se usa como receptor de aguas residuales tratadas de las lagunas de estabilización Estación Salguero, se llevó a cabo un plan de muestreo de 6 meses durante los cuales se identificaron cianobacterias potencialmente productoras de cianotoxinas, además se estimó cualitativamente su abundancia y variación en la distribución de éstas a lo largo del área de muestreo; se evaluaron las fluctuaciones de las características físicas y químicas del área de estudio. Se establecieron tres estaciones de muestreo: río arriba, zona de vertimiento de las aguas residuales y río abajo; se usaron métodos para la identificación y recuento del material ficológico estandarizados y para medir los parámetros físico-químicos. La mayor abundancia de algunas cianobacterias estuvo estrechamente relacionada con las zonas del río donde existe mayor contaminación orgánica. Las cianobacterias productoras de toxinas que predominaron fueron Phormidium sp., Oscillatoria sp. y Pseudanabaena sp. Los resultados fisicoquímicos indican que la calidad del agua del río Cesar es alterada en los puntos donde el río recibe las descargas de aguas residuales y a lo largo de éste.


A 6 month sampling plan was carried out in the Cesar River, which is used as the receiver of treated waste water from the stabilized ponds in Salguero Station. During this time cyanobacteria, potential producer of cyanotoxins, were identified, and also their abundance and variation in the distribution through the sampled area were estimated; fluctuations of physical and chemical characteristics of the area in study were evaluated. Three sample stations were established: upstream, the waste water flowing zone, and downstream. Standardized methods for the identification and recount of phycological material and to measure the physical-chemical parameters were used. The greater abundance of some cyanobacteria was closely related to the areas of the river where there is greater organic contamination. Cyanobacteria producers of toxins which were more predominant were Phormidium sp., Oscillatoria sp. and Pseudanabaena sp. The physical-chemical results indicate that the quality of the water in Cesar river is altered in the areas where the river receives the flow of waste warter and all along its steam.


Subject(s)
Humans , Animals , Wastewater , Water Quality , Water , Cyanobacteria
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