밀양댐 수계의 수서곤충 군집에 대하여

Abstract

An ecological survey was performed in Miryang dam water system during the period of June 5-6, 2000. The fauna collected from 7 sites consisted of total 67 species, 49 genus, 25 families, in 7 orders of aquatic insects, These included 29 species of Ephemeroptera, 22 species of Trichoptera, 7 species of plecoptera, 6 species of Diptera, 1 species of Megaloptera, Odonata and Coleoptera repectively, The relative abundance of Ephemeroptera, Trichoptera, Plecoptera, Diptera, and Coleoptera was 71%,11.2%, 5.1%, 11.9% and 0.6% respectively. The primary dominant species of total level was Epeorus aesculus, and second dominant species was Epeorus latifolium. The primary dominant species were Heplagenia kihada at site 1, Ecdyonurus dracon at slte 2,3,4 and Epeorus aesculus at site 5, Epeorus lalrfolium at site 6,7, Dominance indices were ranged from 0,30 to 0,55, and species diversity indices from 3.11 to 4.25(mean=3.71). Saprobic system based on species diversity indicated that whole sites were oligosaprobic.