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Abstract
UDK: 574.587(282.249 Drinjača)”2012”
 More and more intensive unplanned use of water resources in Europe and beyond, have turned the efforts for stopping exploitation and reduction of available freshwater ecosystems. According to the provisions of the Water Framework Directive (WFD), biotic parameters, especially the benthos organisms (zoological component) gives the greatest significance in the appropriate way of identifying the ecological status and typology. This paper presents the application of different biotic indices in assessing the ecological status of the river Drinjača. The analysis reveals a high diversity in the composition of phytobenthos and macrozoobenthos with domination of preimaginal stage of aquatic insects. Acoording to the indices applied, water of the river Drinjača at locations upstream and downstream of the confluence of Jadar is oligo to betamesosaprobic. A high ecological status has been determined by applying biotic indices on the macrozoobenthos composition ehich takes this part of the stream as referent to all other waterstreams of the same type on the territory of Bosnia and Herzeogovina.
Highlights
More and more intensive unplanned use of water resources in Europe and beyond, have turned the efforts for stopping exploitation and reduction of available freshwater ecosystems
Improving our understanding of freshwater ecology is very important, because of its biological implications, and because the proper management of freshwater is of practical interest for humanity
Freshwater environments are exposed to an increase in degradation
Summary
Improving our understanding of freshwater ecology is very important, because of its biological implications, and because the proper management of freshwater is of practical interest for humanity. In addition to a wide variety of natural stresses encountered by organisms in their habitats, human activities may generate other environmental issues Such harmful alteration, disruption or destruction of freshwater environment could become irreversible, especially in today's unregulated activities concerning water usage in Bosnia and Herzegovina. To the place Duge Njive, it flows in gorge-canyon valley, and upstream of the confluence, receives water from left tributaries Lomnica and Kamenice, and the right Tišić stream, Mrcevac and Jadar. This is a rapid river with an average water level of 63 cm (ZUBČEVIĆ, 1974). Measuring the physical/chemical parameters: water temperature, concentration, oxygen saturation (OXI 3205 set WTW) was performed
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