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KMID : 0615219800050010001
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Journal of Kwangju Health
1980 Volume.5 No. 1 p.1 ~ p.18
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Studies on the Eutrophication and Seasonal Development of Plankton in Gwangju Dongbock Lake
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김병환
류일광/이치영/강영식
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Abstract
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Eutrophication in the Lake Dongbock used as a source of water to Gwangju city was studied to examine the concentration of nutrients and distribution of phytoplanktons. Water sample was collected at 3 positions; surface water of influent area, lake center and pumping station from 18. May 1978 to 18. February 1980.
A summary of the experimental results is shown as follows.
(1) The phytoplankton identification in this investigation showed Cyanophyceae is 7 genera 8 species, Bacillariophyceae 16 genera 26 species and Chlorphyceae 16 genera 26 species; Total 39 genera 60 species.
(2) To appear a dominated alge was Synedra, Melosira, Asterionella, Navicula, Gloecystis, Golenkia and Microcystis.
(3) In the remarkly dominated specis of seasonal welfare s.p 1 and s.p 2, Synedra, Melosira, Asterionella and Gloecystis in spring- (May), and Microcystis, Aphanacapsa, Syrndra and Melosira in summer (Aug) occur the great deal of quantity, and is inclined to decrease in Autumn and Winter.
(4) The concentration of nutrients for nitrogen and phosphorous was 1.124㎎/l and 0.775㎎/l. Because Melosira, Asterionella, Scenedesmus and Anabaena is occuring, it proved to be Eutrophic Lake.
(5) As appearing indication of α and β mesosaprobic system; Anabaena, Microcystis, Oscillatoria, Melosira, Scnedesmus, Navicula and Antictrodesmus, the Lake Dong-bock continues to be a pollution.
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