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Limits to gene flow in a cosmopolitan marine planktonic diatom

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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.
Keywords
marine cosmopolitan planktonic microorganisms, population structure, dispersal, allopatric speciation, microsatellites, PSEUDO-NITZSCHIA-PUNGENS, MICROSATELLITE MARKERS, POPULATION-STRUCTURE, MOLECULAR EVIDENCE, NORTH-SEA, MULTIPLE INTRODUCTIONS, REPRODUCTIVE ISOLATION, DITYLUM-BRIGHTWELLII, SEXUAL REPRODUCTION, CRYPTIC SPECIATION

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Citation

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Chicago
Casteleyn, Griet, Frédérik Leliaert, Thierry Backeljau, Ann-Eline Debeer, Yuichi Kotaki, Lesley Rhodes, Nina Lundholm, Koen Sabbe, and Wim Vyverman. 2010. “Limits to Gene Flow in a Cosmopolitan Marine Planktonic Diatom.” Proceedings of the National Academy of Sciences of the United States of America 107 (29): 12952–12957.
APA
Casteleyn, G., Leliaert, F., Backeljau, T., Debeer, A.-E., Kotaki, Y., Rhodes, L., Lundholm, N., et al. (2010). Limits to gene flow in a cosmopolitan marine planktonic diatom. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 107(29), 12952–12957.
Vancouver
1.
Casteleyn G, Leliaert F, Backeljau T, Debeer A-E, Kotaki Y, Rhodes L, et al. Limits to gene flow in a cosmopolitan marine planktonic diatom. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. 2010;107(29):12952–7.
MLA
Casteleyn, Griet, Frédérik Leliaert, Thierry Backeljau, et al. “Limits to Gene Flow in a Cosmopolitan Marine Planktonic Diatom.” PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 107.29 (2010): 12952–12957. Print.
@article{1048104,
  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.},
  author       = {Casteleyn, Griet and Leliaert, Fr{\'e}d{\'e}rik and Backeljau, Thierry and Debeer, Ann-Eline and Kotaki, Yuichi and Rhodes, Lesley and Lundholm, Nina and Sabbe, Koen and Vyverman, Wim},
  issn         = {0027-8424},
  journal      = {PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA},
  keyword      = {marine cosmopolitan planktonic microorganisms,population structure,dispersal,allopatric speciation,microsatellites,PSEUDO-NITZSCHIA-PUNGENS,MICROSATELLITE MARKERS,POPULATION-STRUCTURE,MOLECULAR EVIDENCE,NORTH-SEA,MULTIPLE INTRODUCTIONS,REPRODUCTIVE ISOLATION,DITYLUM-BRIGHTWELLII,SEXUAL REPRODUCTION,CRYPTIC SPECIATION},
  language     = {eng},
  number       = {29},
  pages        = {12952--12957},
  title        = {Limits to gene flow in a cosmopolitan marine planktonic diatom},
  url          = {http://dx.doi.org/10.1073/pnas.1001380107},
  volume       = {107},
  year         = {2010},
}

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