Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Effects of Fish and Bacterium on the Morphological and Growth of Cyanobacterium Microcystis aeruginosa

박테리아와 어류가 유해조류 Microcystis aeruginosa의 성장 및 형태변화에 미치는 영향

  • Kim, Bo-Ra (Department of Life Science, Hanyang University) ;
  • Han, Myung-Soo (Department of Life Science, Hanyang University) ;
  • Kim, Baik-Ho (Department of Life Science, Hanyang University)
  • 김보라 (한양대학교 자연과학대학 생명과학과) ;
  • 한명수 (한양대학교 자연과학대학 생명과학과) ;
  • 김백호 (한양대학교 자연과학대학 생명과학과)
  • Published : 2005.09.30
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Abstract

Effects of three biological control agents such as Xanthobacter autotrophycus, Tanichthys albonubes and Oryzias latipes on the morphology and growth of cyanobacterium Microcystis aeruginosa were studied. The experiments were consisted of six treatments of living organism (LO) and culture filtered water of three organisms (CFW). Three LOs effectively decreased the density of M. aeruginosa, and then cyanobacteria hardy showed in the microscopic field after 5 days of cultivation. All LO and CFW agents induced the colonial formation of cyanobacterium M. aeruginosa, although there were little differences in colony formation according to the kinds, density and type of treatment. In particular, the higher density treatment of fish CFW induced effectively the colony formation of cyanobacteria, compared to the bacterial LO and CFW. Thus, the application of bio agents to control the cyanobacterial bloom is needed to the further study to diminish the adverse effects such as the enhancement of colony formation towards on the new bloom against the aquatic ecosystem.

유해조류의 대발생을 제어하기 위하여 개발되었던 박테리아, 백운몰개, 송사리 등의 직접 및 배양여액이 배양중인 단독형 (solitary) 남조 M. aeruginosa의 성장 및 형태에 어떠한 영향을 주는지 파악하기 위하여 대수기 조류세포에 생물제재를 농도별로 처리하였다. 실험에 사용된 3가지 생물제재의 적접처리시 남조 M. aeruginosa를 효과적으로 감소시켰으며, 특히 2종의 어류는 모두 처리 5일째 조류세포를 완전히 제어하였다. 생물제재의 직접 또는 여액에 의한 조류세포의 군체형성은 생물제재의 종류, 처리유형, 처리농도 등에 따라 차이를 보였는데, 어류의 경우, 여액 처리농도가 높을수록 높은 군체 및 군체당 높은 세포수를 나타냈으나, 살조세균은 농도에 따른 유의한 차이를 보이지 않았다. 결국, 유해조류의 제어를 위한 생물제재의 현장 적용은 남조 M. aeruginosa의 군체형성을 유도함으로서 새로운 조류대발생의 원인이 될 수 있기 때문에 새로운 생물제재나 적용기법 등의 개발이 필요하다고 판단되었다.

Keywords

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