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KMID : 0615219920170010297
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Journal of Kwangju Health
1992 Volume.17 No. 1 p.297 ~ p.309
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A Study on Phytoplankton Distribution in the Upperpart of Yoˇngsan Lake
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金秉煥
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Abstract
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Water properties and phytoplankton distribution in supperpart of Yongsan lake were investigated during the period from Jun. 30. 1991 to Nov. 17. 1991.
A summary of the surveyed results is as follows.
1. pH ranged from 6.5∼9.4. DO:3.5∼19.9㎎/ℓ, BOD : 1.9∼14.3㎎/ℓ, Total-N: 0.28∼1.21㎎/ℓ and Total-P : 0.25∼0.128㎎/ℓ respectively.
2. At upperpart (Duigugi ferry) where a great number of phytoplanktons were appeared in autumn (Nov. 17) the values of Total-N and Total - P were 1.04㎎/ℓ and 0.128㎎/ℓ respectively.
3. Of the total phytoplanktons collected, there were 11 species of Cyanophyta, 47 species of Chlorohpyta and 25 species of Bacillariophyta.
4. Dominant species were Anabeana sp. Anacystis aeruginosa, Lyngbya contorta, Actinastrum hantzschii var. fluviatile, Dictyosphaerium pulchellum, Melo sira granulata and M.granulata var.augustissima.
5. The largest amount of phytoplanktons were found in autumn, especially the standing crops of Melosira granulata var.angustissima were 7.5×10^(6)cells/ℓ.
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KEYWORD
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