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인천시 도시복원하천 공촌천의 저서성대형무척추동물의 군집 구조에 관한 연구

Study on Community Structure of Benthic Macro-Invertebrates Inhabiting in an Urban Restoration Stream, Gongchon-cheon, in Incheon City

  • 투고 : 2014.07.09
  • 심사 : 2014.07.25
  • 발행 : 2014.11.30

초록

인천광역시의 주요 하천 중 규모가 크고 시민 생활과 밀접한 관련이 있는 공촌천을 대상으로 자연형 하천 조성에 따른 영향 및 개선방안을 도출하기 위해서 연구를 수행하였으며, 이를 위해 2009년 7월에 준공한 공촌천에 대하여 조사 및 분석을 실시하였다. 공촌천의 모니터링 결과 중 조사 여건이 유사한 2004년, 2009년, 2010년의 출현종 분석 결과를 살펴보면, 2004년에는 32종, 2009년 22종, 2010년 46종으로 조사되었으며, 이는 공사전(2004년) 32종이 확인되었던 군집이 자연형 하천정비 공사로 인해 하상이 교란된 시점(2009년)에는 22종으로 출현 분류군이 감소하였으며, 공사가 완료된 후(2010년) 출현종이 46종으로 빠르게 회복한 것을 볼 수 있다. 이는 자연형 하천 정비 공사로 인해 저서성대형무척추동물이 서식 할 수 있는 공간(수제, 여울, 소) 등이 조성되어 다양한 저서성대형무척추동물이 이입된 것으로 판단된다. 이는 본 하천의 생물지수 및 ESB지수, KSI지수 분석 결과와 출현 변화 패턴과 유사한 결과를 보여 하천정비사업 기간 동안 감소하였다가 정비사업 후 안정화 기간을 거쳐 더 좋은 생물 서식 현황을 보이는 것으로 확인되었다.

The subject of this study is the Gongchon-cheon which is one of the largest streams in Incheon and is closely related to lives of citizen. Comparative analysis is made on the changes of the environment and the ecological condition of Gongchon-cheon after the stream naturalization construction which is completed in July 2009. From the results of the survey, 32 species in 2004, 22 species in 2009 and 46 species in 2010 have been recorded. The number of the species decreased from 2004 to 2009 due to the disturbance of the river environment, and it increased in a short time from 2009 to 2010 because of the recovery of the environment. It demonstrates the stream naturalization construction providing enough environments (dikes and rapids) for the benthic macro invertebrates. The result of the present study is similar with the river's biology index, ESB index, and KSI index, and also it is similar with the pattern of the appearance, which illustrates that the species decreased during the naturalization construction, and increased after the stabilization since the finish of the naturalization construction, and it has been confirmed that the naturalization construction provides the better environment for the inhabitation of organisms.

키워드

참고문헌

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