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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Phylogenetic relationships and taxonomic status of the endemic Socorro Warbler (Setophaga pitiayumi graysoni) (2015)
Auteurs :	Edward L. Evans Iii, Auteur ; Juan E. Martínez-Gómez, Auteur ; Ravinder N. M. Sehgal, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (156(2) 2015/01/13)
Article en page(s) :	363-370
Résumé :	The Socorro Warbler (Setophaga pitiayumi graysoni) is currently classified as a subspecies of the Tropical Parula. This bird is endemic to Socorro Island, and due to the island’s distance from mainland Mexico and likely low levels of gene flow for this non-migratory species, we expected this form to exhibit significant divergence from its mainland counterparts. Here, we analyzed the phylogenetic position of the Socorro Warbler and examined its taxonomic status. Using blood samples from four individual Socorro Warblers, we performed phylogenetic analyses using the nuclear genes rhodopsin intron 1 (RDPSN) and transforming growth factor beta-2 (TGFB2), and the mitochondrial genes ATPase and cytochrome b. Bayesian inference, maximum-likelihood, and maximum parsimony analyses were employed to determine the genetic relationship of the Socorro Warbler to its mainland counterparts. Results reveal significant genetic divergence and a basal position of the Socorro Warbler relative to its mainland counterparts. Based on its distinct phylogenetic placement and geographical isolation, we recommend returning the Socorro Warbler to its original specific status, Setophaga graysoni, based on its taxonomic history. This case illustrates the importance of preserving island habitats to save unique island biodiversity that otherwise could pass unnoticed.
En ligne :	http://link.springer.com/article/10.1007/s10336-014-1128-7

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