Testing phylogeographic predictions on an active volcanic island: Brachyderes rugatus (Coleoptera: Curculionidae) on La Palma (Canary Islands)

Authors

  • BRENT C. EMERSON,

    Corresponding author
      Brent Emerson, Fax: 44-01603-592250; E-mail: b.emerson@uea.ac.uk
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  • SHAUN FORGIE,

    Corresponding author
      Brent Emerson, Fax: 44-01603-592250; E-mail: b.emerson@uea.ac.uk
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    • Present address: HortResearch, Mt Albert Research Centre, Private Bag 92169, Auckland, New Zealand

  • SARA GOODACRE,

    Corresponding author
      Brent Emerson, Fax: 44-01603-592250; E-mail: b.emerson@uea.ac.uk
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  • PEDRO OROMÍ

    1. Centre for Ecology, Evolution and Conservation, School of Biological Sciences, University of East Anglia, Norwich NR4 7TJ, UK, Departamento de Zoología, Facultad de Biología, Universidad de La Laguna, 38205 La Laguna, Tenerife, Spain
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Brent Emerson, Fax: 44-01603-592250; E-mail: b.emerson@uea.ac.uk

Abstract

Volcanic islands with well-characterized geological histories can provide ideal templates for generating and testing phylogeographic predictions. Many studies have sought to utilize these to investigate patterns of colonization and speciation within groups of closely related species across a number of islands. Here we focus attention within a single volcanic island with a well-characterized geological history to develop and test phylogeographic predictions. We develop phylogeographic predictions within the island of La Palma of the Canary Islands and test these using 69 haplotypes from 570 base pairs of mitochondrial DNA cytochrome oxidase II sequence data for 138 individuals of Brachyderes rugatus rugatus, a local endemic subspecies of curculionid beetle occurring throughout the island in the forests of Pinus canariensis. Although geological data do provide some explanatory power for the phylogeographic patterns found, our network-based analyses reveal a more complicated phylogeographic history than initial predictions generated from data on the geological history of the island. Reciprocal illumination of geological and phylogeographic history is also demonstrated with previous geological speculation gaining phylogeographic corroboration from our analyses.

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