alexa Limits to gene flow in a cosmopolitan marine planktonic diatom.
Psychiatry

Psychiatry

Journal of Addiction Research & Therapy

Author(s): Casteleyn G, Leliaert F, Backeljau T, Debeer AE, Kotaki Y,

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Abstract The role of geographic isolation in marine microbial speciation is hotly debated because of the high dispersal potential and large population sizes of planktonic microorganisms and the apparent lack of strong dispersal barriers in the open sea. Here, we show that gene flow between distant populations of the globally distributed, bloom-forming diatom species Pseudo-nitzschia pungens (clade I) is limited and follows a strong isolation by distance pattern. Furthermore, phylogenetic analysis implies that under appropriate geographic and environmental circumstances, like the pronounced climatic changes in the Pleistocene, population structuring may lead to speciation and hence may play an important role in diversification of marine planktonic microorganisms. A better understanding of the factors that control population structuring is thus essential to reveal the role of allopatric speciation in marine microorganisms.
This article was published in Proc Natl Acad Sci U S A and referenced in Journal of Addiction Research & Therapy

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