충주 국망산 일대 수계의 저서성 대형무척추동물 군집

An ecological survey was conducted to examine the characteristics of benthic macroinvertebrate community inhabiting adjacent streams originated from Mt. Gukmang in July 2007. The benthic macroinvertebrate taxa represented total 60 species belonging to 15 orders, 6 classes and 4 phyla from the qualitative and quantitative sampling. Among these, a total of 47 aquatic insect species (78.3%) were comprised of the major groups in all communities. The relative abundance of Ephemeroptera, Diptera, Platyhelminthes and Trichoptera was 55.5%, 15.4%, 9.4%, and 8.8%, respectively. According to results, ephemeropteran species were major dominant taxa. The primary dominant species was Baetis fuscatus (19.0%) followed by Ecdyonurus kibunensis (16.5%), Dugesia sp. (9.4%), Chironomidae sp.1 (5.9%), and Baetis silvaticus (5.0%). The average values of dominant index (DI), diversity index (H'), evenness index (J'), and species richness index (R1) were 0.485(±0.093), 3.201(±0.311), 0.791(±0.054), and 2.452(±0.750), and the water quality of all sites was oligosaprobic in average.