무등산국립공원의 부착규조류 분포와 생물학적 수질평가

Abstract

This survey was conducted to evaluate the distribution and biological water quality of epilithic diatoms from April to September 2022 by selecting a total of 17sites in Mudeungsan National Park, Korea. Environmental factors were analyzed such as water temperature, pH, electrical conductivity, BOD, TN and TP. A total of 111 species of epilithic diatoms appeared, and the dominant species were 13 species including Achnanthes convergens, Cocconeis placentula var. lineata, and Gomphonema clevei. Among dominant species, C. placentula var. lineata appeared as the dominant species 13times, showing the highest number of appearances. Among the ecological taxa, the relative frequencies of saproxenous group ranged from 20.63 to 99.57%, saprophilous group ranged from 0 to 50.08%. In evaluation of biological water quality, TDI was 12.5 ~ 99.7, water quality grade was E ~ A, DAIpo was 38.22 ~ 99.79, and water quality was D ~ A grade. In conclusion, the most representative epilithic diatom of Mudeungsan National Park was C. placentula var. lineata in terms of appearance number and dominance frequency. Biological water quality assessments are mostly in good condition, but some points appear to require continuous monitoring of the aquatic environment.