Emerging phylogeographical patterns of plants and terrestrial vertebrates from Patagonia

A. Sérsic,A. Cosacov,A. Cocucci,L. Johnson,R. Pozner,L. Avila,J. Sites,M. Morando

Published 2011 in Biological Journal of The Linnean Society

ABSTRACT

Phylogeographical inferences, applied in a comparative framework across multiple species at a regional scale, provide the means for detecting regional and landscape-level patterns of biodiversity, which are important for understanding macroecology and evolution in a geographical mosaic against a backdrop broadly impacted by geological events. Although information on Patagonian phylogeographical patterns has accumulated for both aquatic and terrestrial organisms in recent years, no attempt has been made to compare patterns across major organismal groups. In this review, we compiled studies on the phylogeography of co-distributed plants and terrestrial vertebrates from Patagonia. From each study, we extracted information on levels of genetic diversity, and inferred demographic processes and phylogeographical breaks, as well as on putative refugia, to produce the first summary of emerging phylogeographical patterns for this region. This review reveals some congruent phylogeographical patterns within and among plants and terrestrial vertebrates, and suggests that Pre-Quaternary as well as Quaternary geological events would have been important driving forces in the evolutionary history of Patagonian lineages. Different processes and directional range shifts suggest a mosaic of phylogeographical patterns, far more complex than the several north–south common patterns traditionally proposed. © 2011 The Linnean Society of London, Biological Journal of the Linnean Society, 2011, 103, 475–494. Las inferencias filogeograficas, dentro de un marco comparativo cuando incluyen varias especies a escala regional, permiten detectar patrones de biodiversidad regional y de paisaje (fisonomicos), importantes para entender tanto la macroecologia como el impacto a gran escala de los eventos geologicos. En los ultimos anos, el conocimiento filogeografico de Patagonia se ha acumulado para organismos acuaticos y terrestres, y aunque se han propuesto pocos patrones demograficos o espaciales cualitativamente concordantes, no se ha hecho ningun intento de revisar comparativamente algunos de esos patrones considerando grandes grupos de organismos. En esta revision compilamos el conocimiento publicado sobre la filogeografia de plantas vasculares y vertebrados terrestres de Patagonia con el proposito de comparar niveles de diversidad genetica, procesos demograficos, quiebres filogeograficos y localizacion de posibles refugios, para producir el primer resumen de patrones filogeograficos emergentes para esta region. Esta revision revela algunos patrones filogeograficos congruentes dentro y entre plantas vasculares y vertebrados terrestres, y sugiere que tanto los eventos geologicos Cuaternarios como los pre-Cuaternarios pudieron haber jugado un papel importante en la historia evolutiva de los linajes patagonicos. Diferentes procesos y cambios direccionales en los rangos de distribucion, sugieren un mosaico de patrones filogeograficos mucho mas complejo que los patrones norte-sur tradicionalmente propuestos.

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