Prva limnološka istraživanja kvaliteta vode Srebrnog jezera u Srbiji
First limnological investigations of the water quality of the Lake Srebrno in Serbia
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The first limnological investigations of the Lake Srebrno water quality were performed in March 2007. The investigations included qualitative, quantitative, and saprobiological analyses of bottom fauna communities, physical chemical analyses of sediments and the determination of chlorophyll a concentration, as well as analyses of the trophic status. Samples were collected at eighteen localities distributed along the shore line, as well as from the deep parts of the lake. Twenty taxa from nine macro-invertebrate groups were recorded. The classification of the water in Lake Srebrno was proposed, based on trophic and saprobic levels. Trophic levels were in the range of upper limits of meso- to eutrophy, and within the limits of the eutrophic status. Calculated values of the Saprobic Index S, based on bio-indicator organisms of macrozoobenthos, ranged from S=2.81 to S=3.58. The water quality was estimated to be within the limits proposed to III and IV-III class of the Serbian (Yugoslav) watercourses.