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Environmental Studies in the Lower Part of the Han River IIX. Assessment for Water Quality Using Epilithic Diatom Assemblage Index to Organic Water Pollution (DAIpo) in Dry Season  

Jung, Seung-Won (Department of Life Science, Hanyang University)
Park, Sung-Hwan (Department of Life Science, Sangmyung University)
Lee, Jin-Hwan (Department of Life Science, Sangmyung University)
Publication Information
Korean Journal of Environmental Biology / v.26, no.3, 2008 , pp. 233-239 More about this Journal
Abstract
In order to access the water quality using epilithic diatom assemblage index to organic water pollution (DAIpo) in the lower part of the Han River, the diatom samples were collected biweekly at 2 stations by means of artificial substrates of ceramic tiles from February, 2004 to February, 2005. A total of 60 taxa, representing 18 genera 51 species, 7 varieties and 2 forms, of diatoms were identified in the present study. Dominant percentages of Aulacoseria granulata and Melosira varians (Indifferent taxa) were 22.76$\sim$30.30% and 17.44$\sim$34.78%, respectively, and Nitzschia palea (Saprophilous taxa) were 15.00$\sim$31.76% at St. 1. In St. 2, the percentages of dominant species, N. palea, were 19.86$\sim$58.20%. Average DAIpo index was 40.6 in St. 1 and 32.1 in St. 2, and the saprobic level was shown $\beta$-mesosaprobic in the lower part of the Han River. It is suggested that epilithic diatoms as bioindicators and a DAIpo index indicate useful for analy-zing assessment of the water quality.
Keywords
DAIpo index; epilithic diatoms; dry season; the Han River;
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