Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Seasonal Variation of Phytoplakton and Phylogenetic Characteristics of Cyanotoxin synthetase genes within Youngsan River in Gwangju

광주지역 영산강 내 식물플랑크톤의 계절적 변동과 남조류 독소합성유전자의 계통발생학적 특성

  • Haram Kim (Department of Environmental Research, Health & Environment Research Institute of Gwangju) ;
  • Gwangwoon Cho (Department of Environmental Research, Health & Environment Research Institute of Gwangju) ;
  • Gyeongrok Son (Department of Environmental Research, Health & Environment Research Institute of Gwangju) ;
  • Dong, Jang (Department of Environmental Research, Health & Environment Research Institute of Gwangju) ;
  • Gwangyeob Seo (Department of Environmental Research, Health & Environment Research Institute of Gwangju) ;
  • Yunhee Kim (Department of Environmental Research, Health & Environment Research Institute of Gwangju)
  • 김하람 (광주광역시보건환경연구원 환경연구부) ;
  • 조광운 (광주광역시보건환경연구원 환경연구부) ;
  • 손경록 (광주광역시보건환경연구원 환경연구부) ;
  • 장동 (광주광역시보건환경연구원 환경연구부) ;
  • 서광엽 (광주광역시보건환경연구원 환경연구부) ;
  • 김연희 (광주광역시보건환경연구원 환경연구부)
  • Received : 2023.02.16
  • Accepted : 2023.05.11
  • Published : 2023.05.31
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Abstract

Cyanobacteria have been used as pollution indicator species in freshwater ecosystems, and identifying their fluctuations can be an important part about management of surface waters globally. Cyanotoxins produced by cyanobacteria are directly or indirectly a threat to human and environmental health. In order to confirm the potential risk of these cyanotoxins, the fluctuations of phytoplankton and phylogenetic analysis of cyanotoxin synthetase genes were conducted at each point in the Yeongsan River water system in Gwangju from November 2021 to October 2022. Diatoms which grow well in winter were dominant at 99.4 ~ 99.5%, and diatoms and green algae were dominant from the spring to autumn when the water temperature rises. Stephanodiscus spp. were dominant at 92.7 to 97.5 % at all sites in the winter, and Aulacoseira spp., which grow in warm water temperatures, were dominant in summer and autumn. Microcystis aeruginosa was dominant at 25.2% in summer only at site 5. mcyB and anaC have been detected as cyanotoxin synthetase genes. The phylogenetic tree of anaC could be divided into two groups (Group 1 & Group 2). Group 1 contained Aphanizomenon sp. and Cuspidothrix issatschenkoi. It is combined with Aphanizomenon sp. and Cuspidothrix issatschenkoi, which are known to produce cyanotoxins.

Keywords

Acknowledgement

본 연구는 2022년 환경부 "환경분야 시험검사의 국제적 적합성 기반구축사업"과 광주광역시보건환경연구원 "연구지원 및 역량강화" 사업의 지원으로 수행하였습니다.

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