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KMID : 0613820080180121671
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Journal of Life Science
2008 Volume.18 No. 12 p.1671 ~ p.1678
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Effect of Turbid Water on the Phytoplankton Community in Imha Reservoir
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Park Jung-Won
Yu Sam-Hwan
Kim Soon-Young
Lee Jong-Eun
Seo Eul-Won
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Abstract
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We investigated the effect of the turbid water on the phytoplankton community in the 4 sites of Imha reservoir. The turbidity of water was proportional to the concentrations of SiO₂-Si. Therefore, as the turbidity of water grow, the concentration of SiO₂-Si increased. And the both the turbidity of water and the concentrations of SiO₂-Si were increased as the water run deep. The concentration of chlorophyll-a decreased as the depth of water increased. Seventy phytoplankton taxa were identified and the most abundant group was Chlorophyceae consisting of 32 taxa (46%), and Cyanophyceae and Bacillariophyceae consisted of 12 taxa (17%). And Euglenophyceae, Synulophyceae, Cryptophyceae and Dinophyceae consisted of 6 taxa (9%), 4 taxa (6%), 3 taxa (4%) and 1 taxon (1%), respectively in Imha reservoir. The concentrations of phytoplankton were increased according to the turbidity of water because of the high amount of organic nutrition which is presented with turbid water. And especially, the concentrations of nitrogen increased easily because of the weak binding to the soil particle. In conclusion, total nitrogen and SiO₂-Si flowed into the Imha reservoir with soil particle, and these inorganic nutritions affect the growth of algae.
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KEYWORD
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Imha reservoir, phytoplankton, turbid water, water quality
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