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Título: Biogeographic insights from past and present megafauna DNA Resumen: Next-generation DNA sequencing has revolutionized the way we can study evolutionary and ecological processes using genomic data. In this talk, I will show how genomic data can be used in an evolutionary and ecological context, to understand the past and present diversity, distribution, and dynamics of megafauna (large mammal) species and communities. I will discuss how DNA retrieved from ancient material including the bones, teeth and gut content of Late Pleistocene megafauna can be used to infer the past ecology and population dynamics of extinct species, and demonstrate how DNA extracted from sediments can be used to reconstruct the palaeoenvironments once inhabited by these Ice Age giants. Furthermore, using genome-wide data from the polar bear, I will demonstrate how population genomics has been used to estimate the age of the species, reconstruct the joint demographic history of polar bear and brown bear, and identify candidate genes under positive selection in the polar bear lineage that have enabled the species to survive the extreme conditions of life in the High Arctic.

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