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Genetic relatedness of a new Japanese isolates of Alexandrium ostenfeldii bloom population with global isolates
- Source :
- Harmful Algae. 84:64-74
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- In recent years, blooms of toxic Alexandrium ostenfeldii strains have been reported from around the world. In 2013, the species formed a red tide in a shallow lagoon in western Japan, which was the first report of the species in the area. To investigate the genetic relatedness of Japanese A. ostenfeldii and global isolates, the full-length SSU, ITS and LSU sequences were determined, and phylogenetic analyses were conducted for isolates from western and northern Japan and from the Baltic Sea. Genotyping and microsatellite sequence comparison were performed to estimate the divergence and connectivity between the populations from western Japan and the Baltic Sea. In all phylogenetic analyses, the isolates from western Japan grouped together with global isolates from shallow and low saline areas, such as the Baltic Sea, estuaries on the east coast of U.S.A. and from the Bohai Sea, China. In contrast, the isolates from northern Japan formed a well-supported separate group in the ITS and LSU phylogenies, indicating differentiation between the Japanese populations. This was further supported by the notable differentiation between the sequences of western and northern Japanese isolates, whereas the lowest differentiation was found between the western Japanese and Chinese isolates. Microsatellite genotyping revealed low genetic diversity in the western Japanese population, possibly explained by a recent introduction to the lagoon from where it was detected. The red tide recorded in the shallow lagoon followed notable changes in the salinity of the waterbody and phytoplankton composition, potentially facilitating the bloom of A. ostenfeldii.
- Subjects :
- 0106 biological sciences
China
Harmful Algal Bloom
Red tide
Population
Zoology
Plant Science
010501 environmental sciences
Aquatic Science
Biology
01 natural sciences
Article
Japan
education
Genotyping
Phylogeny
0105 earth and related environmental sciences
Genetic diversity
education.field_of_study
geography
geography.geographical_feature_category
Phylogenetic tree
010604 marine biology & hydrobiology
Estuary
Dinoflagellida
Microsatellite
Bloom
Subjects
Details
- ISSN :
- 15689883
- Volume :
- 84
- Database :
- OpenAIRE
- Journal :
- Harmful Algae
- Accession number :
- edsair.doi.dedup.....b5ca8917f9ef87b86e1b629e6aeab686
- Full Text :
- https://doi.org/10.1016/j.hal.2019.02.005