ECOLOGICAL RESPONSE OF STREAMS IN KOREA UNDER DIFFERENT MANAGEMENT REGIMES

  • Lee Chang-Seok (Faculty of Environment and Life Sciences, Seoul Women's University) ;
  • Cho Yong-Chan (Faculty of Environment and Life Sciences, Seoul Women's University) ;
  • Shin Hyun-Cheol (Faculty of Environment and Life Sciences, Seoul Women's University) ;
  • Moon Jeong-Suk (Department of Ecological restoration, National Institute of Environmental Research) ;
  • Lee Byung-Cheon (Department of Plant Specimen, National Arboretum) ;
  • Bae Yang-Seop (Department of Biology, Incheon University) ;
  • Byun Hwa-Geun (Department of Biology, Gangwon University) ;
  • Yi Hoon-Bok (Bio-Evaluation Center, Korea Research Institute of Bioscience and Biotechnology)
  • Published : 2005.07.01

Abstract

Today, a trend that tries to return the artificial space of a river to a natural one is expanding. But in Korea, which lies in the monsoon climate zone, rivers endure flood damage every year. Moreover, climatic change from global warming causes severe variations in precipitation patterns. Until recently, river restoration practices in Korea have followed partial restoration. These restorative treatments transformed artificial structures of the stream to natural ones and introduced natural vegetation by imitating natural or semi-natural streams. Treatment transformed the riparian structure and increased the diversity of micro-topography and vegetation. Furthermore, restoration recovered species composition, increased species diversity, and inhibited the establishment of exotic species. In particular, the Suip stream, which was left to its natural process for approximately 50 years, recovered its natural features almost completely through passive restoration. An urban stream, the Yangjae, and a rural stream, the Dongmoon, were restored partially by applying ecological principles. On the contrary, technological treatment applied to recover flood damage induced species composition far from the natural vegetation and decreased species diversity. Additionally, this treatment increased exotic species. The same results were found also in benthic invertebrate and fish fauna. The above-mentioned results reflect the importance of ecological considerations in river management.

Keywords

References

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