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Species Diversity of the Dinoflagellate Genus Alexandrium in the Coastal Waters of Korea during Summer 2013

2013년 하계 국내 연안에서 출현하는 Alexandrium 속 와편모류의 종 다양성

  • KIM, JAE SEONG (Water&Eco-Bio Corporation) ;
  • PARK, KYUNG WOO (Climate Change Research Division, National Institute of Fisheries Sciences) ;
  • YOUN, SEOK HYUN (Climate Change Research Division, National Institute of Fisheries Sciences) ;
  • LIM, WEOL AE (Climate Change Research Division, National Institute of Fisheries Sciences) ;
  • YOO, YEONG DU (Department of Marine Biotechnology, College of Ocean Science and Technology, Kunsan National University) ;
  • SEONG, KEYONG AH (Department of Marine Biotechnology, College of Ocean Science and Technology, Kunsan National University) ;
  • YIH, WON HO (Department of Marine Biotechnology, College of Ocean Science and Technology, Kunsan National University)
  • 김재성 ((주)워터앤에코바이오) ;
  • 박경우 (국립수산과학원 기후변화연구과) ;
  • 윤석현 (국립수산과학원 기후변화연구과) ;
  • 임월애 (국립수산과학원 기후변화연구과) ;
  • 유영두 (군산대학교 해양생물공학과) ;
  • 성경아 (군산대학교 해양생물공학과) ;
  • 이원호 (군산대학교 해양생물공학과)
  • Received : 2016.06.28
  • Accepted : 2016.11.18
  • Published : 2016.11.30

Abstract

We investigated the occurrence of the dinoflagellate genus Alexandrium in the nineteen Korean coastal sites from July to October 2013. Alexandrium-like planktonic cells were microscopically observed only in four out of the 19 sampling sites. From the samples containing Alexandrium-like cells 22 clonal cultures of Alexandrium species were established by single cell or single chain isolation method. Taxonomic identity of the 4 different strains ascertained by the robust analyses of morphological and molecular genetic characteristics were confirmed to be A. catenella, A. affine, A. fraterculus and an unidentified Alexandrium sp. for which strain WEB-Alex-01 was assigned. It was ascertained that in spite of hot summer diverse Alexandrium species attaining up to four were distributed in the study area, in contrast with the long empirical recognition that the emergence of Alexandrium species is restricted to cooler seasons like spring or autumn in Korean coastal waters. Morphology and genetic characteristics of Alexandrium sp. strain WEB-Alex-01 are different from any other previously reported Alexandrium species from Korean seas, which implies that further studies on taxonomic, physiological, ecological and toxicological properties of the newly recorded Alexandrium species are needed.

국내 연안에서 하계에 출현하는 Alexandrium 속 와편모류의 종 다양성 연구를 위해, 2013년 7월부터 10월까지 19개 정점에서 해수 시료를 채취하였고, 이 가운데 4개 지역에서 Alexandrium 속의 와편모류가 확인되었다. 해당 4개 해수 시료에 단세포/단세포사 분리법을 적용하여, 총 22 종류의 Alexandrium 단종배양체를 확립하였다. 이 가운데 4종류의 Alexandrium 단종배양체에 대한 형태학 및 유전학적 특성을 분석한 결과, 각각 A. catenella, A. affine, A. fraterculus 및 Alexandrium sp.(strain WEB-Alex-01)인 것으로 확인되었다. 우리나라 연안에서 일반적으로 Alexandrium이 춘계 또는 추계의 중수온기에 주로 출현하는 것으로 알려진 바와는 대조적으로, 다양한 Alexandrium 종들이 하계에도 출현함을 확인하였다. 미동정 Alexandrium sp.(strain WEB-Alex-01) 종주는 국내 최초 보고 종으로서, 이 단종배양체에 대한 분류, 생리, 생태, 독성 등에 관한 추가적인 연구가 필요하다.

Keywords

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