수원시 일대 저수지의 저서성 대형무척추동물상

Benthic macroinvertebrates fauna was investigated at the reservoirs located in Suwon-si, Gyeonggi-do, South Korea from October, 2012 to March, 2013. Six reservoirs (Gwanggyo, Sindae, Woncheon, Ilwol, Ilwang and Seoho) were selected for quantitative (Dredge, 50×50cm, mesh size 1mm) and qualitative (Hand net, mesh size 1mm) sampling of benthic macroinvertebrates. Total taxa of benthic macroinvertebrates were 34 species, 19 families, 10 orders, 6 classes in 4 phyla. Aquatic insects were composed of 23 species, 11 families, 5 orders, 1 class in 1 phylum. The dominant species and the subdominant species based on abundance were Limnodrilus gotoi and Tanypodinae sp. with 24.4% and 21.5% of dominance respectively. Dominance indices and richness indices of benthic macroinvertebrate communities showed the range of 0.60∼0.95 and 0.36∼1.53 respectively. Dominance indices showed a negative correlation with chemical oxygen demand (r=—0.64, p<0.01), total nitrogen (r=—0.56, p<0.05), total phosphorus (r=—0.54, p<0.05) and chlorophyll  (r=—0.61, p<0.05).