Mechanisms of peripheral phylogeographic divergence in the indo-Pacific: lessons from the spiny lobster Panulirus homarus.

Show simple item record Farhadi, Ahmad en Jeffs, Andrew en Farahmand, Hamid en Rejiniemon, Thankappan Sarasam en Smith, Greg en Lavery, Shane en 2018-11-28T22:25:49Z en 2017-08-18 en
dc.identifier.citation BMC Evolutionary Biology 17(1):14 pages Article number 195 18 Aug 2017 en
dc.identifier.issn 1471-2148 en
dc.identifier.uri en
dc.description.abstract There is increasing recognition of the concordance between marine biogeographic and phylogeographic boundaries. However, it is still unclear how population-level divergence translates into species-level divergence, and what are the principal factors that first initiate that divergence, and then maintain reproductive isolation. This study examines the likely forces driving population and lineage divergences in the broadly-distributed Indo-Pacific spiny lobster Panulirus homarus, which has peripheral divergent lineages in the west and east. The study focuses particularly on the West Indian Ocean, which is emerging as a region of unexpected diversity. Mitochondrial control region (mtCR) and COI sequences as well as genotypes of 9 microsatellite loci were examined in 410 individuals from 17 locations grouped into 7 regions from South Africa in the west, and eastward across to Taiwan and the Marquesas Islands. Phylogenetic and population-level analyses were used to test the significance and timing of divergences and describe the genetic relationships among populations.Analyses of the mtCR revealed high levels of divergence among the seven regions (ФST = 0.594, P < 0.001). Microsatellite analyses also revealed significant divergence among regions, but at a much lower level (FST = 0.066, P < 0.001). The results reveal different patterns of mtCR v. nDNA divergence between the two distinct peripheral lineages: a subspecies in South Africa and Madagascar, and a phylogeographically diverged population in the Marquesas. The results also expose a number of other more fine-scale population divergences, particularly in the Indian Ocean.The divergence of peripheral lineages in the west and east of the species' range appear to have been initiated and maintained by very different processes. The pattern of mitochondrial and nuclear divergence of the western lineage, implicates processes of parapatric isolation, secondary contact and introgression, and suggests possible maintenance through adaptation and behavioural reproductive isolation. In contrast, the eastern lineage appears to have diverged through a rare colonisation event, maintained through long-term isolation, and matches expectations of the core-periphery hypothesis. The process of active peripheral speciation may be a common force in the Indo-Pacific that helps drive some of the regions' recognized biogeographic boundaries. en
dc.format.medium Electronic en
dc.language eng en
dc.relation.ispartofseries BMC evolutionary biology en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri en
dc.rights.uri en
dc.subject Animals en
dc.subject Palinuridae en
dc.subject DNA, Mitochondrial en
dc.subject Phylogeny en
dc.subject Species Specificity en
dc.subject Microsatellite Repeats en
dc.subject Haplotypes en
dc.subject Geography en
dc.subject Principal Component Analysis en
dc.subject Indian Ocean en
dc.subject Pacific Ocean en
dc.subject Phylogeography en
dc.title Mechanisms of peripheral phylogeographic divergence in the indo-Pacific: lessons from the spiny lobster Panulirus homarus. en
dc.type Journal Article en
dc.identifier.doi 10.1186/s12862-017-1050-8 en
pubs.issue 1 en
pubs.begin-page 195 en
pubs.volume 17 en
dc.rights.holder Copyright: The authors en
dc.identifier.pmid 28821229 en
pubs.publication-status Published en
dc.rights.accessrights en
pubs.subtype Research Support, Non-U.S. Gov't en
pubs.subtype research-article en
pubs.subtype Journal Article en
pubs.elements-id 653823 en Science en Biological Sciences en Marine Science en
dc.identifier.eissn 1471-2148 en
pubs.record-created-at-source-date 2017-08-20 en
pubs.dimensions-id 28821229 en

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