English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/113081
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Citado 18 veces en Web of Knowledge®  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar EndNote (RIS)Exportar EndNote (RIS)
Título

Insight into an island radiation: The Tarentola geckos of the Cape Verde archipelago

Autor Vasconcelos, Raquel; Carranza, Salvador ; Harris, David James
Palabras clave Geckos
cyt b
Cape Verde Islands
Biogeography
12S
Island radiation
Tarentola
Phylogeny
Macaronesia
Fecha de publicación jun-2010
EditorWiley-Blackwell
Citación Journal of Biogeography 37(6): 1047-1060 (2010)
Resumen[Aim] To reassess the relationships between Tarentola geckos from the Cape Verde Islands by including specimens from all islands in the range. To determine the variation within forms by sequencing over 400 specimens, thereby allowing the discovery of cryptic forms and resolving some of the issues raised previously. This extensive sampling was also used to shed light on distributions and to explain genetic diversity by comparing the ages and ecological and geological features of the islands (size, elevation and habitat diversity). Location] The Cape Verde Islands: an oceanic archipelago belonging to the Macaronesian biogeographic region, located around 500 km off Senegal. [Methods] A total of 405 new specimens of Tarentola geckos were collected from nine islands with very different geological histories, topography, climate and habitats. Mitochondrial cytochrome b (cyt b) gene and 12S rRNA partial sequences were obtained and analysed using phylogenetic methods and networks to determine molecular diversity, demographic features and phylogeographic patterns. [Results] The phylogenetic relationships between all known forms of Cape Verdean Tarentola specimens were estimated for the first time, the relationships between new forms were assessed and previously hypothesized relationships were re-examined. Despite the large sample size, low intraspecific diversity was found using a 303-bp cyt b fragment. Star-like haplotype networks and statistical tests suggest the past occurrence of a rapid demographic and geographical expansion over most of the islands. Genetic variability is positively correlated with size, elevation and habitat diversity of the islands, but is not linearly related to the age of the islands. Biogeographical patterns have, in general, high concordance with phylogenetic breaks and with the three eco-geographical island groups. Volcanism and habitat diversity, both tightly linked with island ontogeny, as postulated by the general dynamic model of oceanic island biogeography, as well as present and historical size of the islands appear to be the main factors explaining the genetic diversity of this group. [Main conclusions] The Tarentola radiation was clarified and is clearly associated with the geological and ecological features of the islands. Two factors may account for the low intraspecific variation: (1) recent volcanic activity and high ecological stress, and (2) poor habitat diversity within some islands. More studies are needed to align taxonomy with phylogenetic relationships, whereas GIS modelling may help to predict precise species distributions. © 2010 Blackwell Publishing Ltd.
Versión del editorhttp://dx.doi.org/10.1111/j.1365-2699.2009.02254.x
URI http://hdl.handle.net/10261/113081
DOI10.1111/j.1365-2699.2009.02254.x
Identificadoresdoi: 10.1111/j.1365-2699.2009.02254.x
issn: 0305-0270
e-issn: 1365-2699
Aparece en las colecciones: (IBE) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
accesoRestringido.pdf15,38 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 



NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.