Journal
MARINE POLLUTION BULLETIN
Volume 98, Issue 1-2, Pages 95-105Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2015.07.009
Keywords
Alexandrium pacificum (A. catenella - group IV); Toxic dinoflagellate; Harmful algal blooms; Invasive species distribution; Temperate Asian coasts; Microsatellites markers
Funding
- Japan Society for the Promotion of Science (JSPS) [19380116, PE08002]
- Region Languedoc-Roussillon
- Programme National d'Environnement Coder (PNEC-France)
- Grants-in-Aid for Scientific Research [19380116] Funding Source: KAKEN
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The intra-specific diversity and genetic structure within the Alexandrium pacificum Litaker (A. catenella - Group IV) populations along the Temperate Asian coasts, were studied among individuals isolated from Japan to China. The UPGMA dendrogram and FCA revealed the existence of 3 clusters. Assignment analysis suggested the occurrence of gene flows between the Japanese Pacific coast (cluster-1) and the Chinese Zhejiang coast (cluster-2). Human transportations are suspected to explain the lack of genetic difference between several pairs of distant Japanese samples, hardly explained by a natural dispersal mechanism. The genetic isolation of the population established in the Sea of Japan (cluster-3) suggested the existence of a strong ecological and geographical barrier. Along the Pacific coasts, the South North current allows limited exchanges between Chinese and Japanese populations. The relationships between Temperate Asian and Mediterranean individuals suggested different scenario of large-scale dispersal mechanisms. (C) 2015 Published by Elsevier Ltd.
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