The community temperature index (CTI) reflects the temperature and environmental preferences of the community. We investigated the distribution patterns of major aquatic insect assemblages (Ephemeroptera, Plecoptera, and Trichoptera; EPT) based on CTI in streams of South Korea. We selected unpolluted 151 study sites at upper streams (less than 3rd) with less than 1.5 mg L-1 of biochemical oxygen demand. Study sites were clustered into six groups based on the similarities of their EPT composition. All three orders showed a continuous decrease in the number of species as CTI increased, especially in Plecoptera. In addition, the functional feeding groups were also significantly changed according the CTI changes. Temperature tolerance range of each group’s indicator species varied according to the CTI of the group. Finally, changes of CTI reflected differences of EPT assemblages according to the differences of environmental condition including temperature. Therefore, CTI can be applied to the evaluation and preservation of stream ecosystems and prediction of community changes due to climate change.

Abstract
서 론
재료 및 방 법
    1. 자료수집
    2. 군집온도지수 산출
    3. 분석방법
결 과
    1. 군집 분류
    2. 군집 및 섭식기능군 분석
    3. 우점종 및 지표종 분석
    4. NMDS 분석
고 찰본
적 요
REFERENCES

• 심동원(경희대학교 생물학과) | Dong-Won Shim (Department of Biology, Kyung Hee University)
• 이다영(경희대학교 생물학과) | Da-Yeong Lee (Department of Biology, Kyung Hee University)
• 이대성(경희대학교 생물학과) | Dae-Seong Lee (Department of Biology, Kyung Hee University)
• 박영석(경희대학교 생물학과) | Young-Seuk Park (Department of Biology, Kyung Hee University) Corresponding author