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Bacterial Abundances and Enzymatic Activities in the Pore Water of Media of Artificial Floating Island in Lake Paro  

Kim, Yong-Jeon (Dept. of Environmental Sience, Kangwon National University)
Hur, Jai-Kyou (Dept. of Environmental Sience, Kangwon National University)
Nam, Jong-Hyun (Dept. of Environmental Sience, Kangwon National University)
Kim, In-Seon (Dept. of Environmental Sience, Kangwon National University)
Choi, Kyoung-Suk (Dept. of Environmental Sience, Kangwon National University)
Choi, Seung-Ik (Dept. of Environmental Sience, Kangwon National University)
Ahn, Tae-Seok (Dept. of Environmental Sience, Kangwon National University)
Publication Information
Korean Journal of Microbiology / v.43, no.1, 2007 , pp. 40-46 More about this Journal
Abstract
For restoration of disturbed ecosystem in Lake Paro, artificial floating island (AFI) was installed. Even though the lake water was oligo-mesotrophic, the macrophytes, such as Iris ensata, Iris pseudoacorus, Phragmites communis were growing well in the rubberized coconut fiber media. For elucidating this process, total bacterial numbers, active bacterial numbers and exoenzymatic activities of ${\beta}-glucosidase$ and phosphatase of pore water of media and lake water were analyzed. The average of total bacterial numbers, active bacterial numbers and exoenzymatic activities of ${\beta}-glucosidase$ and phosphatase were $28.6{\times}10^{6}\;cells/ml,\;22.7{\times}10^{6}\;cells/ml,\;452.9nM/L/hr,\;and\;16381.9nM/L/hr$ which were 10, 15, 22 and 38 times higher than those of lake water, respectively. Moreover, the total phosphorus and total nitrogen concentration of media showed high values of 0.82 mg/L and 7.0 mg/L, respectively, while those of lake water 0.07 mg/L and 2.3 mg/L. This results suggest that the bacteria was playing an important role for restoration of disturbed ecosystem with newly created microbial ecosystem in media of artificial floating island.
Keywords
artificial floating island; attached bacteria; new microbial ecosystem; pore water; rubberized coconut fiber;
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