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Rates of population differentiation and speciation are decoupled in sea snakes

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dc.contributor Univ Adelaide
dc.contributor Australian Institute Of Marine Science
dc.contributor University Of Adelaide
dc.contributor Australian Inst Marine Sci
dc.contributor Sch Biol Sci
dc.contributor Dept Primary Ind & Reg Dev UDYAWER, VINAY NITSCHKE, CHARLOTTE R. HOURSTON, MATHEW SANDERS, KATE L. 2018-11-18T18:40:02Z 2018-11-18T18:40:02Z 2019-05-09T01:07:05Z 2018-11-18T18:40:02Z 2018-11-18T18:40:02Z 2019-05-09T01:07:05Z 2018-10-01
dc.identifier.citation Nitschke CR, Hourston M, Udyawer V, Sanders KL (2018) Rates of population differentiation and speciation are decoupled in sea snakes. Biology Letters 14: 20180563
dc.identifier.issn 1744-9561
dc.description.abstract Comparative phylogeography can inform many macroevolutionary questions, such as whether species diversification is limited by rates of geographical population differentiation. We examined the link between population genetic structure and species diversification in the fully aquatic sea snakes (Hydrophiinae) by comparing mitochondrial phylogeography across northern Australia in 16 species from two closely related clades that show contrasting diversification dynamics. Contrary to expectations from theory and several empirical studies, our results show that, at the geographical scale studied here, rates of population differentiation and speciation are not positively linked in sea snakes. The eight species sampled from the rapidly speciating Hydrophis clade have weak population differentiation that lacks geographical structure. By contrast, all eight sampled Aipysurus-Emydocephalus species show clear geographical patterns and many deep intraspecific splits, but have threefold slower speciation rates. Alternative factors, such as ecological specialization, species duration and geographical range size, may underlie rapid speciation in sea snakes.
dc.description.sponsorship This work is supported by an Australian Research Council and Australian Biological Resources Study grants to Kate Sanders.
dc.language English
dc.subject Speciation
dc.subject Sea Snake
dc.subject Ecology
dc.subject Life Sciences & Biomedicine - Other Topics
dc.subject Biology
dc.subject Diversity
dc.subject Vicariance
dc.subject Australia
dc.subject Evolutionary Biology
dc.subject Marine
dc.subject Radiation
dc.subject Environmental Sciences & Ecology
dc.subject Phylogeography
dc.title Rates of population differentiation and speciation are decoupled in sea snakes
dc.type journal article
dc.identifier.doi 10.1098/rsbl.2018.0563
dc.identifier.wos WOS:000448817700019

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