Journal of Environmental Impact Assessment (환경영향평가)

Korean Society of Environmental Impact Assessment (한국환경영향평가학회)
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Assessment of Inhabitation and Species Diversity of Fish to Substrate Size in the Geum River Basin

금강수계에서 하상재료에 따른 어류의 종다양성 및 서식지 평가

  • Hur, Jun Wook (Bio-Monitoring Center) ;
  • In, Dong Soo (Department of Biology Education, Kongju National University) ;
  • Jang, Min Ho (Department of Biology Education, Kongju National University) ;
  • Kang, Hyoengsik (Environmental Strategy Research Group, Korea Environment Institute) ;
  • Kang, Kyoung Ho (Department of Aquaculture, Chonnam National University)
  • 허준욱 (생물모니터링센터) ;
  • 인동수 (공주대학교 생물교육과) ;
  • 장민호 (공주대학교 생물교육과) ;
  • 강형식 (한국환경정책평가연구원) ;
  • 강경호 (전남대학교 수산해양대학 해양기술학부)
  • Received : 2011.06.30
  • Accepted : 2011.11.25
  • Published : 2011.12.31
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Abstract

In order to establish fundamental data for stream restoration and environmental flow, we investigated inhabitation and species diversity of fish to substrate size in the typical streams of Geum River Basin. Field monitoring including fish sampling was conducted from October 2007 to October 2009. Substrate size was determined according to six different : silt (Si), sand (Sa), fine gravel (Fg), coarse gravel (Cg), cobbles (Co) and boulders (Bo). A total number of fish caught in the 18 sites was 7,649 representing 10 families 50 species, and Si, Sa, Fg, Cg, Co and Bo stations occupied 30, 29, 38, 30, 27 and 17 species, respectively. The most frequently found species in number was pale chum (Zacco platypus, 29.7%, n=2,275) followed by Z. koreanus (22.5%, n=1,720) in total stations. Biological diversity with increase of substrate size from the dominance of part species showed higher values as dominance index, lower and diversity, richness and evenness index. Index of biological integrity (IBI) and qualitative habitat evaluation index (QHEI) scores decreased with increase of substrate size. Therefore, it is necessary to make an effort on stream rehabilitation with evaluation of physical habitat condition by indicator species in order to maintain biodiversity and perform ecological restoration.

Keywords

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