Macroinvertebrados bentonicos como indicadores de la calidad del agua de la cienaga La Pava en el municipio de Magangue-Bolivar.

Abstract

The swamps are bodies of water of environmental importance that provide a variety of ecosystem services benefiting society, however, these ecosystems are being affected by climate change and mainly by anthropic activities. The objective of this study was to evaluate the water quality by analyzing the composition of benthic macroinvertebrates through diversity indices such as Margalef, Menhinick, Shannon, Jaccard and Simpson's dominance index. At the same time, biotic indices such as BMWP/Col and IBF were used and relationships were established with the physicochemical parameters in situ and ex situ, through a canonical correspondence analysis (ACC). A total of 4,084 macroinvertebrates belonging to 23 families were collected, the most abundant being the Chironomidae and Culicidae families. The diversity indices showed the same diversity pattern for all the stations, being the E2 station the one with the least diversity, in the same way the Kruskal Wallis analysis for richness did not show significant differences between the stations (p>0.05). . The BMWP/Col and IBF indices classified the stations into three classes (I, II, III), with station E2 being the one with the greatest disturbance. On the other hand, according to the ACC, there were higher relationships between families of the order Odonata, including some families of the order Hemiptera with higher concentrations of dissolved oxygen, as well as a high relationship between the pH and families of the order Hygrophila and Mesogastropoda. The Ciénaga La Pava presented variations in water quality, evidencing its decrease in quality in seasons that have a greater impact due to anthropic activities.