Journal
MARINE ECOLOGY-AN EVOLUTIONARY PERSPECTIVE
Volume 36, Issue 3, Pages 368-378Publisher
WILEY
DOI: 10.1111/maec.12146
Keywords
Biogeography; COI; LGM; population genetics
Categories
Funding
- Research Grants Council
- HKSAR [CUHK463509]
- Group Research Scheme of the Research Committee
- Chinese University of Hong Kong (CUHK)
- Career Development Award from Academia Sinica, Taiwan [AS-98-CDA-L15]
- CUHK Research Fellowship Scheme
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Pleistocene glaciations were among the important historic events that shaped the population structures of marine organisms. Genetic studies of different marine fauna and flora have demonstrated the effect of Pleistocene glaciations on taxa that reside in marginal seas. However, how marine island species responded to Pleistocene glaciations remains relatively unstudied, especially in Asia. Genetic analyses based on the island-associated barnacle Chthamalus moro collected from 14 sites in Asia reveal that C.moro comprises three distinct lineages, with COI divergence ranging from 3.9 to 8.3%. Population genetic analyses on respective lineages reveal signs of demographic expansion within the Pleistocene epoch at different times. The Ogasawara lineage, which has a more oceanic distribution, expanded the earliest, followed by the population expansion of the Ryukyu and Southern lineages that inhabit islands closer to the continent. The data suggest that the inhabitants of outer islands may have been less affected by Pleistocene glaciations than those that reside closer to the continent, as the former were able to maintain a large, stable, effective population size throughout the late Pleistocene.
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