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.
journal_name
Proc Natl Acad Sci U S Aauthors
Casteleyn G,Leliaert F,Backeljau T,Debeer AE,Kotaki Y,Rhodes L,Lundholm N,Sabbe K,Vyverman Wdoi
10.1073/pnas.1001380107subject
Has Abstractpub_date
2010-07-20 00:00:00pages
12952-7issue
29eissn
0027-8424issn
1091-6490pii
1001380107journal_volume
107pub_type
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