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Article: Population differentiation in the barnacle Chthamalus malayensis: Postglacial colonization and recent connectivity across the Pacific and Indian Oceans

TitlePopulation differentiation in the barnacle Chthamalus malayensis: Postglacial colonization and recent connectivity across the Pacific and Indian Oceans
Authors
KeywordsChthamalidae
Cryptic species
Demographic expansion
Glaciation
Indo-west pacific
Population connectivity
Issue Date2008
PublisherInter-Research. The Journal's web site is located at http://www.int-res.com/journals/meps/index.html
Citation
Marine Ecology Progress Series, 2008, v. 364, p. 107-118 How to Cite?
AbstractChthamalus malayensis is a common intertidal acorn barnacle widely distributed in the Indo-West Pacific. Analysis of the mitochondrial cytochrome c oxidase subunit I (COI) sequences of samples from its distribution range revealed 3 genetically differentiated clades: the South China Sea, Indo-Malay and Taiwan clades. The clades have an allopatric distribution and differed by ∼7.5 to 14% in COI. They also differed in zonation patterns and abundances within vertical ranges. The genetic and ecological differences suggest that the 3 clades probably represent distinct species. There were signatures of postglacial demographic expansion, yet the timing of expansion varied among clades, which is attributable to the differences in their geographical distributions. The Indian Ocean population of the Indo-Malay clade apparently attained its present range by postglacial re-colonization from the Pacific and, as a result, genetic differentiation among populations in the 2 oceans is low (Φ CT = -0.01, p = 0.49). There were differences in cohort structure between populations in India and the Malay Peninsula. Together, this suggests a considerable level of contemporary gene flow over an evolutionary, but relatively restricted dispersal on an ecological time scale. Cohort structure also varied among Malaysia and Singapore, the South China Sea and Taiwan waters, indicating distinct larval supplies among the 3 clades, possibly determined by different ocean current systems. This physical dispersal of larvae interacts with local biological factors in determining the on-shore distribution and genetic structure of the barnacle populations. Our findings highlight the importance of combining ecological and genetic data to understand factors that mould biodiversity patterns. © Inter-Research 2008.
Persistent Identifierhttp://hdl.handle.net/10722/60723
ISSN
2015 Impact Factor: 2.361
2015 SCImago Journal Rankings: 1.554
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council, Hong Kong SARHKU7597/05M
National Science Council, TaiwanNSC 96-2621-B-001-007-MY3
Academia Sinica, Taiwan
Funding Information:

We thank C. H. Hsu and P. C. Tsai (Academia Sinica, Taiwan) for assisting with the field work in India, Malaysia and Singapore. J. True (The University of Hong Kong) and M. Ganmanee (King Mongkut's Institute of Technology Ladkrabang, Thailand) assisted with collections in Sri Chang Island, Thailand, J. Leung (The University of Hong Kong) collected specimens from Sri Lanka. The authors thank the late Prof. Alan Southward for his advice during the study. The work was partially supported by a grant from the Research Grants Council, Hong Kong SAR (HKU7597/05M), a research grant from the National Science Council, Taiwan (NSC 96-2621-B-001-007-MY3) and an internal research grant from Academia Sinica, Taiwan.

References

 

DC FieldValueLanguage
dc.contributor.authorTsang, LMen_HK
dc.contributor.authorChan, BKKen_HK
dc.contributor.authorWu, THen_HK
dc.contributor.authorNg, WCen_HK
dc.contributor.authorChatterjee, Ten_HK
dc.contributor.authorWilliams, GAen_HK
dc.contributor.authorChu, KHen_HK
dc.date.accessioned2010-05-31T04:17:11Z-
dc.date.available2010-05-31T04:17:11Z-
dc.date.issued2008en_HK
dc.identifier.citationMarine Ecology Progress Series, 2008, v. 364, p. 107-118en_HK
dc.identifier.issn0171-8630en_HK
dc.identifier.urihttp://hdl.handle.net/10722/60723-
dc.description.abstractChthamalus malayensis is a common intertidal acorn barnacle widely distributed in the Indo-West Pacific. Analysis of the mitochondrial cytochrome c oxidase subunit I (COI) sequences of samples from its distribution range revealed 3 genetically differentiated clades: the South China Sea, Indo-Malay and Taiwan clades. The clades have an allopatric distribution and differed by ∼7.5 to 14% in COI. They also differed in zonation patterns and abundances within vertical ranges. The genetic and ecological differences suggest that the 3 clades probably represent distinct species. There were signatures of postglacial demographic expansion, yet the timing of expansion varied among clades, which is attributable to the differences in their geographical distributions. The Indian Ocean population of the Indo-Malay clade apparently attained its present range by postglacial re-colonization from the Pacific and, as a result, genetic differentiation among populations in the 2 oceans is low (Φ CT = -0.01, p = 0.49). There were differences in cohort structure between populations in India and the Malay Peninsula. Together, this suggests a considerable level of contemporary gene flow over an evolutionary, but relatively restricted dispersal on an ecological time scale. Cohort structure also varied among Malaysia and Singapore, the South China Sea and Taiwan waters, indicating distinct larval supplies among the 3 clades, possibly determined by different ocean current systems. This physical dispersal of larvae interacts with local biological factors in determining the on-shore distribution and genetic structure of the barnacle populations. Our findings highlight the importance of combining ecological and genetic data to understand factors that mould biodiversity patterns. © Inter-Research 2008.en_HK
dc.languageengen_HK
dc.publisherInter-Research. The Journal's web site is located at http://www.int-res.com/journals/meps/index.htmlen_HK
dc.relation.ispartofMarine Ecology Progress Seriesen_HK
dc.subjectChthamalidaeen_HK
dc.subjectCryptic speciesen_HK
dc.subjectDemographic expansionen_HK
dc.subjectGlaciationen_HK
dc.subjectIndo-west pacificen_HK
dc.subjectPopulation connectivityen_HK
dc.titlePopulation differentiation in the barnacle Chthamalus malayensis: Postglacial colonization and recent connectivity across the Pacific and Indian Oceansen_HK
dc.typeArticleen_HK
dc.identifier.emailWilliams, GA: hrsbwga@hkucc.hku.hken_HK
dc.identifier.authorityWilliams, GA=rp00804en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.3354/meps07476en_HK
dc.identifier.scopuseid_2-s2.0-50149086070en_HK
dc.identifier.hkuros148166en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-50149086070&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume364en_HK
dc.identifier.spage107en_HK
dc.identifier.epage118en_HK
dc.identifier.isiWOS:000258810800010-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridTsang, LM=15830844000en_HK
dc.identifier.scopusauthoridChan, BKK=7201530640en_HK
dc.identifier.scopusauthoridWu, TH=52763997000en_HK
dc.identifier.scopusauthoridNg, WC=24723024100en_HK
dc.identifier.scopusauthoridChatterjee, T=7101992271en_HK
dc.identifier.scopusauthoridWilliams, GA=7406082821en_HK
dc.identifier.scopusauthoridChu, KH=7402453508en_HK

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