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http://dx.doi.org/10.13047/KJEE.2019.33.2.187

Analysis of Fish Ecology and Water Quality for Health Assessments of Geum - River Watershed  

Park, Yun-Jeong (Education Graduate Course Chungnam National Univ.)
Lee, Sang-Jae (Saemangeum Regional Environmental Office)
An, Kwang Guk (Dept. of Biological Science, College of Bioscience and Biotechnology, Chungnam National Univ.)
Publication Information
Korean Journal of Environment and Ecology / v.33, no.2, 2019 , pp. 187-201 More about this Journal
Abstract
This study examined the physicochemical water quality and evaluated the ecological health in 14 sites of Geum River (upstream, mid-stream, and downstream) using the fish community distribution and guilds and eight multi-variable matrices of FAI (Fish Assessment Index) during June 2008-May 2009. The analysis of the water quality variables showed no significant variation in the upstream and mid-stream but a sharp variation due to the accumulation of organic matter from the point where the treated water of Gap and Miho streams flew. The analysis of physicochemical water properties showed that BOD, COD, TN, TP, Cond, and Chl-a tended to increase while DO decreased to cause eutrophication and algae development from the downstream where Miho and Gap stream merged. The analysis of fish community showed that the species richness index and species diversity index increased in the mid-stream area but decreased in the downstream area, indicating the stable ecosystem in the upper stream and the relatively unstable ecosystem in the downstream. The analysis of the species distribution showed that the dominant species were Zacco platypus that accounted for 20.9% of all fish species and Zacco koreanus that accounted for 13.1%. The analysis of the fish tolerance and feeding guild characteristics showed that the sensitive species, the insectivore species, and the aquatic species were dominant in the mid-stream point. On the other hand, contaminants from the sewage water treatment plant of Miho stream had a profound effect in the downstream to show the dominance of tolerant species, omnivorous species, and lentic species. Therefore, it is necessary to improve water quality by reducing the load of urban pollutants and to pay attention to the conservation and restoration of aquatic ecosystems.
Keywords
INDEX BIOLOGICAL INTEGRITY; POLLUTIONAL LOADING AMOUNTS; DOMINANT SPECIES; POLLUTION SOURCE;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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