The Relationship between Water-Bloom and Distribution of Microorganisms That Inhibit the Growth of Cyanobacterium (Anabaena cylindrica)

수화와 시안세균(Anabaena cylindrica) 생장 억제 미생물 분포도의 상관관계

  • Kim, Chul-Ho (Department of Microbiological Engineering, Chinju National University) ;
  • Lee, Jung-Ho (Environmental Research Team, Water Resources Research Institute, Korea Water Resources Corporation) ;
  • Choi, Yong-Keel (Department of Biology, College of Natural Sciences, Hanyang University, Research Center for Molecular Microbiology, Seoul National University)
  • 김철호 (진주산업대학교 미생물공학과) ;
  • 이정호 (한국수자원공사 수자원연구소 환경연구팀) ;
  • 최영길 (한양대학교 자연과학대학 생물학과, 서울대학교 분자미생물학연구센타)
  • Published : 1998.12.01

Abstract

The authors examined the variations of environmental factors, the distributions of cyanobacteria, heterotrophic bacteria, and microorganisms that inhibit the growth of Anabaena cylindrica according to development and extinction of cyanobacterial bloom at a site in Daechung Dam reservoir. And certified the relationship between each other. Water temperature variated in a typical pattern. pH and concentrations of dissolved oxygen and chlorophylla was high in bloom period, and lowered with the decline of bloom. Phosphorus played as a growth-limiting factor at this study site. Total nitrogen concentration increased during blooming period, which indicated that nitrogen has been fixed by aquatic organisms such as cyanobacteria. Cyanobacteria distributed from June 17, and such cyanobacterial species as Anabaena spp., Aphanizomenon spp., Microcystis spp., Oscillatoria spp. and Phormidium spp. was detected during study period. Anabaena spp. distributed relatively highly distributed from July 23 to September 22, and disappeared completely at September 29. Heterotrophic bacterial and cyanobacterial populations varied inverse-proportionally. There was a relevancy between the variations of Anabaena spp., heterotrophic bacteria, and microorganisms that inhibit the growth of Anabaena cylindrica. Microorganisms that inhibit the growth of Anabaena cylindrica distributed from early growth phase of Anabaena spp. population to immediately after the extinction of Anabaena spp. With the population of Anabaena cylindrica growth-inhibiting microorganisms decreasing, increases of heterotrophic bacterial population followed it. Thease results indicate that microorganisms have a part in the extinction of cyanobacterial bloom, especially at its destroying period.

Keywords

Water-bloom Anabaena cylindrica;Cyanobacteria;Growth-inhibition;Microorganisms

Acknowledgement

Supported by : 한국과학재단