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Ecological studies on Togyo Reservoir in Chulwon, Korea. V. Seasonal Changes of Size-Fractionated Standing Crops and Chlorophyll a of Phytoplankton in Kyungan Stream of Paldang River-Reservoir Systems and Togyo Reservoir, Korea  

Han, Myung-Soo (Dept. of Life Science, Hanyang University, Dept. of Environmental Engineering Graduate School Envirionmental Studies, Hanyang University)
Lee, Hu-Rang (Dept. of Environmental Engineering Graduate School Envirionmental Studies, Hanyang University)
Hong, Sung-Su (Dept. of Environmental Science, Hanyang University)
Kim, Young-Ok (Dept. of Life Science, Hanyang University)
Lee, Kyung (Dept. of Biology, The Catholic University of Korea)
Choi, Yong-Keel (Dept. of Life Science, Hanyang University)
Kim, Sewha (Dept. of Life Science, Yong-In University)
Yoo, Kwang-Il (Dept. of Life Science, Hanyang University)
Publication Information
Korean Journal of Environmental Biology / v.20, no.1, 2002 , pp. 91-99 More about this Journal
Abstract
With physico-chemical environmental factors such as temperature, DO, pH, conductivity and nutrients, size fractionated of phytoplankton standing crops and chlorophyll a concentrations $(>8\mu{m},\;3-8\mu{m},\;<3\mu{m})$ and their relationships were investigated at each station of Kyungan Stream and Togyo Reservoir from April to November in 1997. The two sampling sites showed different nutrient status: Kyungan Stream was eutrophic, while Togyo Reservoir was mesotrophic. Large sizes of phytoplankton and chl. a were higher in Kyungan Stream, opposite to those of Togyo Reservoir; Standing crops of phytoplankton $(>8\mu{m)$ and chl. a $(3-8\mu{m)}$ were high in Kyung-an Stream, while phytoplankton $(3-8\mu{m)}$and chi. a $(<3\mu{m)$ were abundant in Togyo Reservoir. These results imply that phytoplankton community in the highly eutrophicated water mainly comprised the large filamentous and/or colonial algae, such as Microcystis spp. and Aphanizomenon flos-aquae, which easily enriched by nutrients loading.
Keywords
Size-fraction; phytoplankton; Chloyophyll a; Kyungan Stream of Paldang River-Reservoir Systems; Togyo Reservoir;
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