Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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A Study of Structure of Phytoplankton Community in the Upstream Watershed of East River, Korea

동강 수계의 식물플랑크톤 군집 구조에 관한 연구

  • Cho, Yong-Chul (Department of Environmental Engineering, Sangji University) ;
  • Shin, Yoon-Keun (Department of Environmental Engineering, Sangji University)
  • 조용철 (상지대학교 환경공학과) ;
  • 신윤근 (상지대학교 환경공학과)
  • Received : 2011.08.26
  • Accepted : 2012.03.15
  • Published : 2012.03.31
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Abstract

Survey on the phytoplankton community structure and distribution in the upstream watershed of the East River was carried out during the period from May, 2008 to April, 2009. A total composition of phytoplankton included 159 taxa, consisting of 7 orders, 56 genera, 139 species, and 40 unidenfied species. Among those, the diatoms and green algae were more frequently found during the investigation than the other taxa. Cocconeis placentula, Cymbella minuta, Diatoma vulgare, Melosira varians, Navicula cryptocephala, Scenedesmus acuminatus v. acuminatus, were among the most common. The standing crops of the phytoplankton ranged from 86 cells $mL^{-1}$ to 1,467 cells $mL^{-1}$. The dominant species were Achnanthes minutissima, Asterionella formosa, Aulacoseira ambigua, Cocconeis placentula, Coelastrum microporum, Cyclotella sp., Cymbella affinis, C. minuta, C. tumida, Diatoma vulgare, Fragilaria capucina, F. construens, F. crotonensis, Gomphonema affine, G. clevei, Melosira varians, Merismopedia elegans, Navicula cryptocephala, N. pupula, Nitzschia tryblionella, Oscillatoria anna, O. limosa, O. tenuis v. tenuis, Pediastrum duplex v. reticulatum, Phormidium tenue, Scenedesmus acuminatus v. acuminatus, S. acutus v. acutus, S. ecornis v. ecornis, S. quadricauda v. quadricauda, Spirogyra sp., Stigeoclonium sp., Synedra acus, S. ulna, and Ulothrix sp. The most dominant species was Cymbella minuta. The diversity index, evenness index, and dominance index ranged from 1.58 to 3.10, 051 to 0.95, and 0.22 to 0.74, respectively. The phytoplankton community structure of upstream stations of the survey area was influenced by the effluent of the Doam Lake.

동강 수계의 식물플랑크톤 군집 구조를 알아보기 위하여 2008년 5월부터 2009년 4월까지 22개 지점에서 총 4 회 조사를 실시하였다. 동강수계에서 출현한 식물플랑크톤은 총 159종으로서 7강 58속 113종 21변종 25미동정종으로 구성되어 있으며, 규조강이 90종류로 전체 중 56.6%로 가장 높은 점유율을 나타냈고, 그 다음으로 녹조강이 47종류로 29.6%의 점유율을 나타냈으며 남조강이 17종으로 10.7%, 유글레나강이 2종으로 1.3%, 황색편모조강, 갈색편모조강, 와편모조강이 각각 1종 0.6% 순으로 나타났다. 조사기간 모든 시기 20정점 이상에서 출현한 보편종은 Cocconeis placentula, Cymbella minuta, Diatoma vulgare, Melosira varians, Navicula cryptocephala, Scenedesmus acuminatus v. acuminatus 등 6종이었다. 현존량은 86 cells $mL^{-1}$~1,467 cells $mL^{-1}$의 범위로 나타났고, 점유율이 10% 이상인 우점종은 Achnanthes minutissima, Asterionella formosa, Aulacoseira ambigua, Cocconeis placentula, Coelastrum microporum, Cyclotella sp., Cymbella affinis, C. minuta, C. tumida, Diatoma vulgare, Fragilaria capucina, F. construens, F. crotonensis, Gomphonema affine, G. clevei, Melosira varians, Merismopedia elegans, Navicula cryptocephala N. pupula, Nitzschia tryblionella, Oscillatoria anna, O. limosa O. tenuis v. tenuis, Pediastrum duplex v. reticulatum, Phormidium tenue, Scenedesmus acuminatus v. acuminatus, S. acutus v. acutus, S. ecornis v. ecornis, S. quadricauda v. quadricauda, Spirogyra sp., Stigeoclonium sp., Synedra acus, S. ulna, Ulothrix sp. 등 34종이었는데, 가장 중요한 종은 90개 시료 중 52개에서 우점종으로 나타난 Cymbella minuta이었다 종다양성지수는 1.58~3.10, 균등도지수는 0.51~0.95, 우점도지수는 0.22~0.74의 범위로 연구지역이 상당히 안정된 것으로 조사되었다. 본 조사지역의 상류정점의 식물플랑크톤 군집구조는 도암호에서 나오는 방류수에 의해 영향을 받는 것으로 사료된다.

Keywords

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