여름철 천호지의 하절기 엽록소 a와 세균 활성의 변화 = Change of chlorophyll-a and bacterial activity during summer in Cheonho reservoir

다국어 초록 (Multilingual Abstract)

Environmental factors were investigated at an outlet station of Cheonho reservoir from July 10th to July 26th in 1995. Water temperature was maintained at 24∼25℃ and pH was an alkaline with a ranged of 8.2∼9.9 for the investigation period. The concentration of nitrite was ranged from 22 to 262 ㎍/ℓ and that of inorganic phosphate was low in spite of the highest concentration of inlet stream. The chlorophll-a concentration rapidly decreased with precipitation and then gradually increased to 157 ㎍/ℓ at second week. Inorganic phosphate was correlated negatively with chlorophyll-a. The number of heterotrophic bacteria was not correlated with precipitation and remained stable at 2.6∼7.0×10 exp(4) CFU/㎖. Glucose uptake rate varied from 30 to 60%/h and increased with increasing precipitation.