Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Dynamics of Phytoplankton Communities of Major Dam Reservoirs in Han River System

한강 수계 주요 인공댐호의 식물플랑크톤 군집 동태

  • Youn, Seok Jea (Han River Environment Research Center, National Institute of Environmental Research) ;
  • Park, Hae-Kyung (Han River Environment Research Center, National Institute of Environmental Research) ;
  • Shin, Kyoungae (Han River Environment Research Center, National Institute of Environmental Research)
  • 윤석제 (국립환경과학원 한강물환경연구소) ;
  • 박혜경 (국립환경과학원 한강물환경연구소) ;
  • 신경애 (국립환경과학원 한강물환경연구소)
  • Received : 2009.11.20
  • Accepted : 2010.02.08
  • Published : 2010.03.30
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Abstract

This study was to investigate phytoplankton communities and to evaluate the effects of hydrological and physical-chemical environmental factors in major five dam reservoirs in the Han River water system. Annual average of chlorophyll a concentration in Lake Paldang, Lake Cheongpyeong and Lake Doam was higher than that of Lake Chungju and Lake Hoengseong. The opposite seasonal variation patterns of phytoplankton growth were observed in dam reservoirs; the highest biomass in spring of dry season in Lake Paldang, Lake Cheongpyeong which are the river-type reservoirs and Lake Doam where turbidity was high throughout the year, and in summer and autumn of rainy season in Lake Chungju and Lake Hoengseong which are the lake-type reservoirs, indicating that the seasonal pattern for growth of phytoplankton in on-river reservoirs is mainly determined by hydrologic characteristics. The dominant species of phytoplankton in Lake Paldang, Lake Cheongpyeong and Lake Doam, where the concentration of nutrients was relatively high, were Bacillariophyceae such as Stephanodiscus hantzschii, Aulacoseira granulata var. angustissima in Lake Paldang and Lake Cyeongpyeong and Nitzschia spp. in Lake Doam throughout all season. The dominant species of phytoplankton in Lake Chungju and Lake Hoengseong which showed the oligo-mesotrophic state, were Bacillariophyceae such as Stephanodiscus hantzschii, Cyclotella pseudostelligera in spring and winter, but Cyanophyceae such as Microcystis spp. in summer.

Keywords

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