On April 29, 2021 (1st), June 2 (2nd), and August 17 (3rd), we surveyed benthic macroinvertebrates fauna at Muljangori-oreum wetland in Bonggae-dong, Jeju Island, Korea. Muljangori-oreum wetland was divided into four areas. The survey was conducted in three accessible areas (areas 1-3). As a result of habitat environment analysis, the average monthly temperature from 2017 to 2021 was the highest in July and August and the lowest in December and February. This pattern was repeated. As a result of analyzing changes in vegetation and water surface area through satellite images, normalized difference vegetation index (NDVI) increased from February to July and decreased after July. Normalized difference water index (NDWI) was analyzed to show an inverse relationship. A total of 21 species from 13 families were identified in the qualitative survey and a total of 412 individuals of 24 species from 15 families were identified in the quantitative survey. A total of 26 species from 17 families, 8 orders, 3 classes, and 2 phyla of benthic macroinvertebrates were identified. The dominant species was Chronomidae spp. with 132 individuals (32.04%). Noterus japonicus was a subdominant species with 71 individuals (17.23%). As a result of comparative analysis of species identified in this study and the literature, it was confirmed that species diversity was high for Coleoptera and Odonata. Main functional feeding groups (FFGs) were found to be predators. Habitat orientation groups (HOGs) were found to be swimmers. In OHC (Odonata, Hemiptera, and Coleoptera) group, 17 species (73.91%) in 2021, 23 species (79.31%) in 2016, 26 species (86.67%) in 2018, and 19 species (79.17%) in 2019 were identified. Cybister japonicus, an endangered species II, was confirmed to inhabit Muljangori-oreum wetland in the literature. Ten individuals (2.43%) were also confirmed to inhabit Muljangori-oreum wetland in 2021. Therefore, continuous management and habitat protection are required to maintain the habitat environment of C. japonicus in Muljangori-oreum wetland.

Abstract
서 론
재료 및 방법
    1. 조사지점 및 조사시기
    2. 분석방법
결과 및 고찰
    1. 서식지 환경 분석
    2. 종조성
    3. 연도별 종조성 및 기능군 분석
    4. OHC-group
적 요
사 사
REFERENCES

• 한중수(상지대학교 생명과학과) | Jung Soo Han (Department of Biological Science, College of Science & Engineering, Sangji University)
• 안채희(상지대학교 생명과학과) | Chae Hui An (Department of Biological Science, College of Science & Engineering, Sangji University)
• 임정철(국립생태원 습지센터) | Jeong Cheol Lim (Wetland Center, National Institute of Ecology)
• 조광진(국립생태원 습지센터) | Kwang Jin Cho (Wetland Center, National Institute of Ecology) Corresponding author
• 이황구(상지대학교 생명과학과) | Hwang Goo Lee (Department of Biological Science, College of Science & Engineering, Sangji University) Corresponding author