Geography and past climate changes have shaped the evolution of a widespread lizard from the Chilean hotspot
Author
dc.contributor.author
Muñoz Mendoza, Carla
Author
dc.contributor.author
D'Elia, Guillermo
Author
dc.contributor.author
Panzera, Alejandra
Author
dc.contributor.author
Méndez, Marco
Author
dc.contributor.author
Villalobos Leiva, Amado
Author
dc.contributor.author
Sites Jr., Jack W.
Author
dc.contributor.author
Victoriano, Pedro F.
Admission date
dc.date.accessioned
2018-07-03T22:22:40Z
Available date
dc.date.available
2018-07-03T22:22:40Z
Publication date
dc.date.issued
2017
Cita de ítem
dc.identifier.citation
Molecular Phylogenetics and Evolution, 116 (2017): 157–171
es_ES
Identifier
dc.identifier.other
10.1016/j.ympev.2017.08.016
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/149444
Abstract
dc.description.abstract
The complex orogenic history and structure of Southern South America, coupled with Pleistocene glacial cycles, have generated paleoclimatic and environmental changes that influenced the spatial distribution and genetic composition of natural populations. Despite the increased number of phylogeographic studies in this region and given the frequent idiosyncratic phylogeographic patterns, there is still the need to focus research especially on species that are currently distributed within a wide range of bioclimatic regimes, and that historically have been subject to contrasting scenarios. Liolaemus tennis is a widely distributed lizard species inhabiting latitudinally in almost 1000 km through central and southern Chile. Here we describe the geographical patterns of genetic variation and lineage diversification within L. tenuis, and their association with geography and Pleistocene glaciations, using sequences from one mitochondrial and two nuclear genes, and five microsatellite loci, and covering most of the species distributional range. Our results revealed a high diversity both within and among populations, as well as two phylogeographic breaks, which are consistent with two of the larger rivers of central Chile, the Maipo and Biobio Rivers. Liolaemus tenuis is characterized by several allopatric lineages, especially in its north and central range, which suggest a history of multiple vicariance processes. Conversely, populations found in the southern range, south of the Biobio River, show signatures of recent decreases in effective population sizes, coupled with recent range expansions and secondary contact. Niche "envelope" data are consistent with patterns of genetic variation; both suggest a history of discontinuous areas of relatively stable populations throughout all of the distribution of L. tennis. These data are also consistent with higher probabilities of habitat suitability north of the Maipo River (ca. 33 S), in both coastal areas and the "Intermediate Depression" between 34 and 37 S, as well as in the southern Coastal Cordillera between the Biobio and Araucania regions. Interestingly, both molecular and niche envelope modeling data suggest that some populations may have persisted in fragmented refugia in Andean valleys, within the limits of the ice sheet. Finally, our results suggest that several populations of L. tenuis colonized glaciated regions from refugial areas in lowlands and coastal regions, and in the southern distribution, historic migration events would have occurred from refugial areas within the limits of the ice sheet.
es_ES
Patrocinador
dc.description.sponsorship
Fondo Nacional de Ciencia y Tecnologia, FONDECYT
1120872
1161650
1141055
1140540
NSF-PIKE OISE
0530267
NSF
241885
Programa REDOC-Drado. en Cs. Ambientales. U. de Concepcion
CONICYT
63130151