The community structure of benthic macroinvertebrates in Upo wetland was identified, and the biological water quality was evaluated. In addition, through statistical analysis of current and literature data, ecological changes over time were evaluated for each wetland. Benthos were quantitatively collected in March, June, and September of 2020 and 2021, and 4 phyla, 5 classes, 16 orders, 42 families, 81 species and 3,406 individuals were identified. In the functional feeding group of Upo wetland, predators were dominant with 34 species (45.95%) and 1,504 individuals (41.84%). In the habitual dwelling group, sprawlers and swimmers showed the highest proportion in the number of species and individuals. Average biological indices in Mokpo and Upo were the highest and lowest, respectively, and it is considered that Mokpo maintains the healthy ecosystem for benthic macroinvertebrates. Community stability was high in Upo, and other wetlands are thought to be stabilizing. The ecological score of benthic macroinvertebrate community is considered to be more suitable index among three biological water quality evaluation indices for the environmental evaluation of Upo wetland. The evaluation results on changes in environmental quality showed that Upo has stable ecosystem without significant change, Mokpo and Sajipo have significant increases in some indices.

Abstract
1. 서 론
2. 재료 및 방법
    2.1. 조사지점 및 조사기간
    2.2. 조사방법 및 분류
    2.3. 생물학적 환경평가
    2.4. 생물지수 및 생태계 변화평가
    2.5. 기능군과 군집 안정성
3. 결과 및 고찰
    3.1. 저서성 대형무척추동물 서식 현황
    3.2. 생물지수
    3.3. 생물학적 환경질 평가
    3.4. 기능군의 유형분석
    3.5. 주요출현군
    3.6. 군집 안정성
    3.7. 우포늪의 생태계변화
4. 결 론
REFERENCES

• 황태원(창원대학교 생물학･화학융합학부) | Tae-Won Hwang (Department of Biology & Chemistry, Changwon National University, Changwon 51140, Korea)
• 배성우(창원대학교 생물학･화학융합학부) | Seong-Woo Bae (Department of Biology & Chemistry, Changwon National University, Changwon 51140, Korea)
• 윤춘식(창원대학교 생물학･화학융합학부) | Chun-Sik Yoon (Department of Biology & Chemistry, Changwon National University, Changwon 51140, Korea)
• 홍성진(낙동강유역환경청) | Sung-Jin Hong (Nakdong River Basin Environmental Office, Changwon 51439, Korea)
• 정선우(창원대학교 생물학･화학융합학부) | Seon-Woo Cheong (Department of Biology & Chemistry, Changwon National University, Changwon 51140, Korea) Corresponding author