계룡산국립공원의 부착돌말류 분포와 유기물지수(DAIpo) 및 영양염지수(TDI)를 이용한 생물학적 수질평가

초록

In the present study, nine survey points were selected in Gyeryongsan National Park, South Korea, to evaluate the dis- tribution and water quality of attached diatoms in May and September 2021. The habitat status and species diversity of epilithic dia- toms were analyzed to evaluate biological water quality using epilithic diatoms. In total, 107 types of attached diatoms appeared, with 80 and 78 species identified in May and September, respectively. Eight dominant species were identified, including Achnanthes con- vergens and Achnanthidium minutissimum. For ecological taxa, the relative frequencies of saproxenous taxa, saprophilous taxa, and indifferent t were 15.7–93.4%, 0–10.5%, and 6.6–84.3%, respectively. The Trophic Diatom Index (TDI) was 18.2–96.5, the water quality grade was E-A, The Diatom Assemblage Index for organic water pollution (DAIpo) was 57.9–96.7, and the water quality was C-A grade in the biological water quality evaluation. On average, points R6 and R8 were grade A, and point R9 was grade D. TDI and DAIpo were mostly in good condition; however, differences in water quality grades were observed at certain points depending on the survey period. Therefore, the biological water quality evaluation in Gyeryongsan National Park based on DAIpo and TDI indexes could reflect the status of aquatic ecosystem environment.

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