Nov 26, 2015

Urbanization shapes the demographic history of a city-dwelling native rodent

BioRxiv : the Preprint Server for Biology
Stephen E. HarrisJason Munshi-South


How urbanization shapes population genomic diversity and evolution of urban wildlife is largely unexplored. We investigated the impact of urbanization on white-footed mice, Peromyscus leucopus , in the New York City metropolitan area using coalescent-based simulations to infer demographic history from the site frequency spectrum. We assigned individuals to evolutionary clusters and then inferred recent divergence times, population size changes, and migration using genome-wide SNPs genotyped in 23 populations sampled along an urban-to-rural gradient. Both prehistorical climatic events and recent urbanization impacted these populations. Our modeling indicates that post-glacial sea level rise led to isolation of mainland and Long Island populations. These models also indicate that several urban parks represent recently-isolated P. leucopus populations, and the estimated divergence times for these populations are consistent with the history of urbanization in New York City.

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Mentioned in this Paper

Impacted Tooth
Isolation Aspects
Pelmatellus leucopus
Gene Clusters
Single Nucleotide Polymorphism

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