창원시 도시하천에서 저서성 대형무척추동물의 군집분포와 생물학적 환경평가 = Community Distribution of Benthic Macroinvertebrates and Its Biological-Environmental Assessments in Urban Streams of Changwon City

다국어 초록 (Multilingual Abstract)

The study contains that the community distribution of benthic macroinvertebrates and its biological-environmental assessments in urban streams(Gaeumjeongcheon stream, Bansongcheon stream) of Changwon city. During the period of study, 3 phyla, 5 classes, 11 orders, 27 families, 38 species 1,703 individuals of benthic macroinvertebrates were collected. In consecutive order, the species composition is Non-insecta, Ephemeroptera, Odonata, Diptera, Hemiptera, Trichoptera. In Gaeumjeongcheon stream, Asellus hilgendorfii Bovalius was the most dominant species as 18.56% whereas chironomidae sp. was as 32.84% in Bansongcheon stream. Overall biotic indices including diversity, richness, evenness index show higher in Gaeumjeongcheon stream except for dominance index. As a result of biological environmental evaluation and cluster analysis, water quality class of Gaeumjeongcheon stream is Ⅲ, Ⅳ overall when Bansongcheon stream is Ⅴ. Also, the two streams were classified into different groups, which is because of numerous factors such as external disturbances.

국문 초록 (Abstract)

본 연구에서는 창원시 도시하천(가음정천, 반송천)의 저서성 대형무척추동물의 군집분포 조사 및 생물학적 환경평가를 하였다. 연구기간동안 조사된 저서성 대형무척추동물은 가음정천에서 총 3문 5강 11목 27과 38종 1,703개체이며 구성종은 비곤충류, 하루살이목, 잠자리목, 파리목, 노린재목, 날도래목의순이었다. 반송천에서는 총 3문 5강 9목 18과 23종 1,553개체이며 구성종은 비곤충류, 파리목, 하루살이목, 잠자리목, 노린재목, 날도래목 순이였다. 가음정천에는 물벌레(Asellus hilgendorfii Bovalius)가 18.56%로 전체적으로 우점하였고, 반송천에는 깔따구과 sp.(Chironomidae sp.)가 32.84%로 전체적으로 우점하였다. 생물지수는 우점도를 제외한 다양도, 풍부도, 균등도가 가음정천에서 더 높은 범위에 분포하였다. 생물학적 환경평가 결과, 가음정천은 전체적으로 수질등급 Ⅲ, Ⅳ등급 이었으며, 반송천은 수질등급 Ⅴ등급이었다. 유사도 분석결과, 두 하천이 서로 다른 그룹으로 묶였는데 이는 외부교란 등의 요인이 작용했을 것으로 판단된다.

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