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KMID : 0382419980240030131
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Korean Journal of Environmental Health Society
1998 Volume.24 No. 3 p.131 ~ p.136
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A Study on the Epilithic Algae in a stream drained from Hot Springs
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Choi Hwan-Seok
Yu Chun-Man
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Abstract
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Attached algal community and several physico-chemical characters were investigated at Seokjong hot spring in Chollabukdo in February and in April, 1997. The results of physico-chemical factors are as follows:water temperatures were varied from 6.5℃ to 32.0℃; pH range was 6.9 to 7.7; The levels of electric conductivity were 105㎛hos/cm to 477㎛hos/cm; chemical oxygen demand(COD) range was 1.5 mg/ℓ to 21.2 mg/ℓ; ammonia concentration was 0.20 mg/ℓ to 8.74 mg/ℓ; nitrate concentrations were 0.36 mg/ℓ to 2.43 mg/ℓ; phosphate concentration was N.D. to 0.52 mg/ℓ; sulfur concentration was 14.6 mg/ℓ to 66.1 mg/ℓ. Attacched algal species were identified. Totally, 63 taxa were classified and composed of 4 phylum, 4 class, 10 order, 17 family and 31 genera. The total biomass of attacched algae was 1.036 x 10 exp(7) cells/l that composed of 5.39 x 10 exp(6) cells/l of blue-green algae, 4.05 x 10 exp(6) cells/l of diatom and 0.93 x 10 exp(6) cells/l of green algae. The succession of dominant species was Synechocystis thermalis. This could be due to the thermal wastewaters. In biotic indices tests, the values of dominance index(DI) were 0.33 to 0.67 in winter, 0.18 to 0.68 in spring. The values of diversity index(H´) were 1.44 to 2.69 in winter, 1.62 to 2.89 in spring. And the values of eveness index (J) were 0.31 to 0.61 in winter, 0.37 to 0.65 in spring.
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