Abstract

CARDENAS-CASTRO, Estrella; LUGO-VARGAS, Ligia; GONZALEZ-ACOSTA, Julio Alberto  and  TENJO-MORALES, Ana Isabel. APPLICATION OF THE FAMILY BIOTIC INDEX OF MACROINVERTEBRATES FOR WATER CHARACTERIZATION OF THE TEUSACA RIVER, TRIBUTARY OF THE BOGOTA RIVER. rev.udcaactual.divulg.cient. [online]. 2018, vol.21, n.2, pp.587-597. ISSN 0123-4226.  https://doi.org/10.31910/rudca.v21.n2.2018.1004.

The Teusacá River subbasin presents high industrial and urbanization activities in approximately 50% of its surface, which has generated discharges of waste water and pollutants into the aquatic environment. The aim of this study was to characterize the quality of water based on the insect family biotic index (FBI) in two river sectors (low and high) in two seasons (dry and rainy) and to analyze the FBI correlation with: TOC, phosphates sulphates, nitrates, nitrites and diversity indices. Sampling was carried out in October 2016 and in July 2017 at the end of the dry season and the rainy season, repectively, using a Surber net (500 microns and 0.09m2) at 10 sites, distributed along in the main course of the river. A total of 35 taxa were recorded, the groups with more families were: Diptera (28%), Coleoptera (17%) and Hemiptera (11%). The IBF was significantly and positively correlated with chemical pollutants (>76%) and the main pollutants of the River observed were phosphates and the TOC; while the IBF was not correlated with the diversity indices. The water quality in the high river sector was between good and regular in both seasons; while in the lower river sector it was very harmful and unhealthy. The results obtained suggest that the FBI is an appropriate indicator for determining the water quality of the river.

Keywords : aquatic invertebrates; rivers; water quality; water pollution.

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