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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

  • 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.

Keywords

Alexandrium;Species Diversity;A. catenella;A. affine;A. fraterculus;Taxonomy

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Acknowledgement

Grant : 하구역 종합관리시스템개발 연구

Supported by : 국립수산과학원, 한국해양과학기술진흥원