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KMID : 1024520150240091101
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Journal of the Environmental Sciences
2015 Volume.24 No. 9 p.1101 ~ p.1121
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Seasonal Variations of Water Quality and Phytoplankton of 4 Lagoons in the East Coast of Korea
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Moon Byeong-Ryeol
Jeon Hyeon-Jin
Jeon Sook-Lye
Lee Jae-Sun
Shin Ji-Eun
Ahn Ji-Hye
Yang Yong-Woon
Hyun Moon-Sik
Kim Mi-a
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Abstract
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The seasonal variation of phytoplankton communities and its standing crops in accordance with environmental factors were investigated at Yeongrang-ho, Cheongcho-ho, Mae-ho and Hyang-ho which are located in the East coast of Korea during April to October 2011. High concentrations of T-N and T-P were observed in four lagoons due to the inflowing nutrients from farmlands and residential areas near lagoons. Nutrient salts mainly composed of nitrogen and phosphate caused the eutrophication of the lakes, leading to the robust growth of phytoplankton. During the period of investigation, 64 to 107 taxa of phytoplankton were observed in four lagoons. Diatoms were the most dominant species with high density. Non-point pollution source was estimated as the main cause of water pollution of lagoons. Trophic states of lagoons evaluated using the value of TSI and TSIKO indicated that all the investigated lagoons were in the eutrophication state.
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KEYWORD
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Lagoon, Nutrient, Phytoplankton, Eutrophication, TSI, TSIKO
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