Reed warblers in the Marquesas Islands: song divergence and plumage convergence of two distinct lineages
Résumé
13 The Pacific Ocean is the site of the most important diversification of insular reed warblers 14 (Acrocephalus). In the Marquesas Islands (Eastern Polynesia), reed warblers belong to two distinct 15 lineages that have reached the archipelago independently. We used mitochondrial sequences and 16 microsatellite markers and found evidence of gene flow between the two lineages. One island in 17 particular, Nuku Hiva, seems to act as the main contact zone between the two taxa. We then used 18 reflectance spectrometry to evaluate the variation of carotenoid colouration among all populations. 19 The Marquesan reed warblers exhibit convergent evolution in carotenoid-based plumage 20 colouration, but variation among islands was important. Having two different phylogenetic origins, 21 the two lineages acquired their yellow colour independently and there is stochastic variation in 22
Domaines
Biodiversité et Ecologie
Origine : Fichiers produits par l'(les) auteur(s)
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