Water quality of the River Danube in Yugoslavia, evaluated from the oligochaete community
Djukic, N.; Miljanovic, B.; Maletin, S.; Ivanc, A.; Zhenjun, S.
During the period 1974-1993, Oligochaeta have been studied as indicator organisms for detecting changes in water quality of the lowland section of the River Danube in Yugoslavia. Water quality (especially in the bank region) has degraded considerably due to organic pollution and slower waterflows, particularly in the region of the Iron Gate dam, which was completed in the 1970s. In the last ten years, population densities have increased for species indicative of eutrophication (Branchiura sowerbyi, Limnodrilus hoffmeisteri, L. claparedeanus and Tubifex tubifex). The changes in water quality are a result of anthropogenic impacts, and these pose a serious threat to the Iron Gate section of the Danube.