Abstract

VERA-PARRA, Néstor F. et al. Impact of wastewater discharge from an oil company on the phytoperiphyton community of Acacias river (Meta, Colombia) during raining season. Orinoquia [online]. 2011, vol.15, n.1, pp.31-40. ISSN 0121-3709.

The aim of this study was to determine the effects of water associated with the oil industry production, which is discharged into the Acacias River, Meta - Colombia. For this purpose, the abundance and richness of the phytoperyphyton community and the effects on physical and chemical water variables of the tributary receiving the wastewater discharges were evaluated throughout an evaluation of the algae communities associated with rocky substrates during the rainy season (July 27 to August 10, 2009). Three main points were selected: ca. 200 m before the wastewater discharge, the wastewater discharges site and, the river after the mixing of wastewater discharge (ca. 200 m after the mixing). The physical and chemical parameters and the abiotic component were evaluated in each site. Highly significant differences (P<0.001) for biotic factors, such as richness of algae and abundance, and also physical and chemical variables in the wastewater discharges site were observed. These results could infer the possible deleterious effects of these wastewater discharges on the aquatic ecosystem allowing the higher abundance of Cyanophycecae in this site.

Keywords : bioindicador; oil industry; phytoperiphyton; wastewater discharge; algae.

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