Aquatic Macroinvertebrates as Indicators of Autodepuration Zones in the Colombian Andean Lotic System
The self-purification process in a water system involves the ability to stabilize the presence of external agents in the water column through physical, chemical, and biological processes. This study aims to identify this self-purification zone in a Colombian Andean lotic system, using the community of aquatic macroinvertebrates (AM) as a biological indicator, supported by physical and chemical variables as additional information. To do so, the water quality prior to anthropogenic impact was established as a reference point, recording parameters such as pH, dissolved oxygen, and conductivity. Subsequently, data were collected after the perturbing event until values comparable to the initial point were reached, thus determining the potential recovery zone. Analyses were conducted at four sampling stations, where AM were collected, and physical and chemical parameters were recorded. Organisms were predominantly identified at the genus level, using taxonomic keys and visual guides. The sampling period spanned six months, from December 2009 to May 2010. When comparing the density of certain AM genera in stations before and after anthropogenic impact, it was observed that the self-purification zone is located at the fourth station, situated 2.2 km away from the disturbance point. In this area, the number of individuals is similar in some taxa compared to the reference station, with variations in their density. The results obtained are supported by the biological water quality (BMWP/Col index) and the majority of the analyzed physical and chemical variables.
| Main Authors: | , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Universidad del Cauca
2023
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| Online Access: | https://revistas.unicauca.edu.co/index.php/novedades/article/view/2360 |
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