Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Relation between Rainfall and Phytoplankton Community in Daechung Reservoir

대청호에서 강우와 식물플랑크톤 군집의 관계

  • Joung Seung-Hyun (Environmental Biotechnology Laboratory, Korea Research Institute of Bioscience and Biotechnology) ;
  • Ahn Chi-Yong (Environmental Biotechnology Laboratory, Korea Research Institute of Bioscience and Biotechnology) ;
  • Choi Aeran (Environmental Biotechnology Laboratory, Korea Research Institute of Bioscience and Biotechnology) ;
  • Jang Kam-Yong (College of Medicine, Konyang University) ;
  • Oh Hee-Mock (Environmental Biotechnology Laboratory, Korea Research Institute of Bioscience and Biotechnology)
  • 정승현 (한국생명공학연구원 환경생명공학연구실) ;
  • 안치용 (한국생명공학연구원 환경생명공학연구실) ;
  • 최애란 (한국생명공학연구원 환경생명공학연구실) ;
  • 장감용 (건양대학교 의과대학) ;
  • 오희목 (한국생명공학연구원 환경생명공학연구실)
  • Published : 2005.03.01
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Abstract

The phytoplankton community, environmental factors, and rainfall were investigated from July to October in 2001 and 2003 on Dam site in Daechung Reservoir. The monthly average rainfall in the investigated period were 91.3 and 265.3 mm in 2001 and 2003, respectively. The maximum chlorophyll a concentration was observed higher at 131.5 ㎍ L/sup -1/ in 2003 than at 45.4 ㎍ L/sup -1/ in 2001. The cyanobacterial number in 2001 was counted up to over 200,000 cells mL/sup -1/, which was much higher than the maximum number of 49,000 cells mL/sup -1/ in 2003. The relative abundance of cyanobacteria in the phytoplankton community was about 97% in 2001 and 74% in 2003. Microcystis spp. were absolutely dominant species in 2001, while a couple of cyanobacteria such as Oscillatoria spp., Phormidium spp. Chroococcus spp. and Microcystis spp. were dominant species in 2003. Consequently, it seemed that rainfall affected the diversity of phytoplankton species and decreased the density of bloom-forming cyanobacteria.

2001, 2003년의 7월부터 10월까지 대청호에 위치한 댐 지역에서 식물플랑크톤 군집, 환경요인 및 강우량을 조사하였다. 조사 기간동안의 월평균 강우량은 2001, 2003년 각각 91.3, 265.3mm로 조사되었다. 최대 Chl. a의 농도는 2001, 2003년 각각 45.4, 131.5 ㎍ L/sup -1/로 조사되었다. 남조류 세포수는 2003년 최대 49,000 cells mL/sup -1/로 조사되었고, 2001년은 최대 200,000 cells mL/sup -1/ 이상으로 조사되었다. 그리고 식물플랑크톤 군집에서 남조류의 상대 풍부도는 2001년 97%, 2003년 74%였다. 2001년은 Microcystis spp.가 조사기간동안 우점종으로 조사되었고, 2003년은 Oscillatoria spp., Phormidium spp. Chroococcus spp. 그리고 Microcystis spp. 순으로 우점종의 변화를 보여줬다. 결론적으로 강우량은 식물플랑크톤의 종 다양성 및 수화현상을 일으키는 남조류 세포 밀도에 영향을 주었다.

Keywords

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