Composition of the Macroinvertebrates of the Hilly-Mountainous Stream in South-Western Serbia
2015
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Чланак у часопису (Објављена верзија)
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© 2015 by the Serbian association for water protection
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The aim of this paper is to present the composition and structure of aquatic macroinvertebrate fauna of the Trnavska River. The Trnavska River is a hilly-mountainous watercourse located in the south-western part of Serbia (the Ibar River drainage, the Danube Basin). It is characterized by a rocky and pebble bottom. The downstream stretch of the river is under the influence of human activities and regulated by concrete slabs down to the confluence into the Raška River. A total of 48 macroinvertebrate taxa were recorded. Insects were the most diverse taxa group with a share of 83% of all taxa recorded. Trichoptera were found to be the most diversified order of insects (11 species). Insects were found to be the principal component of the macroinvertebrate community in respect to quantitative composition, as well, with a share of 67.08% of the total community density. Amphipoda (Crustacea) were found to be the subdominant component in respect to community density. The Trnavska River is the south-western boundary of the distribution of the Gammarus fossarum in Serbia. Mixed populations of G. fossarum and G. balcanicus were recorded in the upper stretch of the Trnavska River (sites 1-3).