Assessment of Water Quality of the Gostelja River Based on the Composition of Macrozoobenthos Communities

The collection of macrozoobenthos from the Gostelja River was conducted in May 2022. Sampling was carried out at 7 locations. Through qualitative-quantitative analysis of macrozoobenthos, a total of 19 taxa or 355 individuals belonging to different taxonomic groups such as Mollusca, Turbellaria, Ephemeroptera, Plecoptera, Trichoptera, Diptera, and Odonata were recorded. Based on the conducted research and index calculations, we can conclude that different water quality classes can be observed along the course of the Gostelja River.