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Effects of Environmental Factors on the Bacterial Community in Eutrophic Masan Reservoir  

남귀숙 (농업기반공사 농어촌연구원)
손형식 (부산대학교 미생물학과)
차미선 (부산대학교 미생물학과)
조순자 (부산대학교 미생물학과)
이광식 (농업기반공사 농어촌연구원)
이상준 (부산대학교 미생물학과)
Publication Information
Korean Journal of Microbiology / v.39, no.2, 2003 , pp. 95-101 More about this Journal
Abstract
The total bacterial numbers, Eubacterial community structures and environmental factors which affect bacterial community were estimated monthly using DAPI and fluorescent in situ hybridization monthly, from June to November 2000 to evaluate the correlation between the bacterial community and environmental factors in eutrophic agricultural Masan reservoir in Asan. Average water temperatures varied from 12.3 to $27.5^{\circ}C$, pH 7.5 to 9.0, DO 7. I~12.8 mg/L, COD 6.4~13.0 mg/L, chlorophyll a 30.5~99.0 mg/㎥, SS 7.S~25.7 mg/L, TN 1.748~3.543 mg/L., and TP 0.104~0.581 mg/L, respectively. Total bacterial numbers showed high ranges from 0.4 to 9.6$\times$ $10^{6}$ cells/ml, and these indicated the mesotrophic or eutrophic state. The ratio of Eubacteria to total bacteria was 67.6-88.0%, which was higher than that in other reservoir. The relationships of total bacteria and Eubacteria community were more significant with organic nitrogen (Org-N), and organic phosphorus (Org-P) than with water temperature. Proteobacteria groups showed strongly significant relationships with Org-P and Org-N and significant relationships with water temperature, conductivity, COD, and inorganic nitrogen. C-F group was the most significant with Org-N, and HGC group with water temperature. However, relationships of Chl-a, pH, DO and SS showed no significance with any bacterial community. These results were different from other studies, because of the specific characteristics of Masan reservoir such as old, shallow and eutrophic states. The seasonal variation of bacterial community in Masan reservoir does not seem to depend on phytoplankton dynamics but on storm event and organic materials from watershed and the sediment of reservoir.
Keywords
bacterial community; correlation coefficient; fluorescent in situ hybridization (FISH); Masan reservoir;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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