The Ejido River is an ecosystem of ecological and social importance which flows through much of the city of Popayán becoming an environmental axis, but human activities have led to a deterioration of this ecosystem. In order to establish indicators for this water resource, the aquatic community was evaluated (Macroinvertebrates and periphyton), performing sampling (4) in four points distributed over the urban area of the city, where there were variations of the physico-chemical characteristics of water in relation to the biota present. According to the score awarded by the BMWP, 4 sampling points are classified in class V (≤ 15) as being heavily polluted waters. 18 genera of algae were identified, the most frequent were: Anabaena, Chlamydomona, Euglenophyta, Oscillatoria, Trachelomona, Merismopedia and Tabellaria, which is an indicator of eutrophication and high content of organic matter; a condition due to dumping from the life stock slaughter center and the lack of a sewerage system. Keywords: Bioindicators, Quality of water, Biomonitoring. Composición y estructura de la comunidad de macroinvertebrados y perifiton del río Ejido, Popayán -CaucaResumen El río Ejido es un ecosistema de importancia ecológica y social, que atraviesa gran parte de la ciudad de Popayán convirtiéndose en un eje ambiental, pero las diferentes actividades antrópicas han conllevado a un deterioro del ecosistema. Con el fin de establecer indicadores de este recurso hídrico, se evaluó la comunidad acuática (Macroinvertebrados y Perifiton); realizándose muestreos (4), en cuatro puntos distribuidos sobre la zona urbana de la ciudad, donde se registraron las variaciones de las características fisicoquímicas del agua en relación con la biota presente. De acuerdo a la puntuación otorgada por el BMWP, los 4 puntos de muestreo se catalogan en clase V (≤ 15) siendo aguas fuertemente contaminadas. Se identificaron 18 géneros de algas, los más frecuentes fueron: Anabaena, Chlamydomona, Euglenophyta, Oscillatoria, Trachelomona, Merismopedia y Tabellaria, indicadoras de eutrofia y altos contenidos de materia orgánica; condición debida a los vertimientos de la central de sacrificio (matadero) y de la carencia de sistema de alcantarillado.Palabras clave: Bioindicadores, Calidad de agua, Biomonitoreo.
No abstract
The carragenophytas species are defined as macro-algae, members of the Phylum Rodophyta, Rodophyceae Class, Florideophycidae Subclass, Gigartinales Order. The most important commercial species at the international level are the Betaphycus, Eucheuma and Kappaphycus genera and at the national level the species belonging to the Gigartina, Mazzaella and Sarcothalia genera.
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