Tracking island colonization history and phenotypic shifts in Indian Ocean bulbuls (Hypsipetes : Pycnonotidae).

摘要: Molecular phylogenies of island organisms provide useful systems for testing hypotheses convergent or parallel evolution, since selectively neutral molecular characters are likely to be independent phenotype, and the existence similar environments on multiple isolated islands provides numerous opportunities populations evolve independently under same constraints. Here we construct a phylogenetic hypothesis Hypsipetes bulbuls western Indian Ocean, use this test colonization pattern phenotypic change among region. Mitochondrial sequence data were collected from all extant taxa region, combined with relevant lineages in Asia. Data consistent single Ocean Asia within last 2.6 Myr. The expansion appears have occurred rapidly, descendants found across breadth its range. suggest that more recent madagascariensis Madagascar led Aldabra secondary Comoros. Groupings according similarities do not correspond mtDNA lineages, suggesting these evolved by convergence parallelism. direction cannot inferred confidence, primary rapidly relative rate substitution, remains uncertain. However, evidence biogeography comparison events persistence small grey continental bulbul India Madagascar, origins large size green plumage insular Comoros, Mascarenes Seychelles. © 2005 Linnean Society London, Biological Journal , 2005, 85 271‐287. ADDITIONAL KEYWORDS: evolution ‐ homoplasy clock phylogeography.