Dispersal ability predicts spatial genetic structure in native mammals persisting across an urbanization gradient.

摘要: As the rate of urbanization continues to increase globally, a growing body research is emerging that investigates how shapes movement-and consequent gene flow-of species in cities. Of particular interest are native persist cities, either as small relict populations or larger synanthropic thrive alongside humans new urban environments. In this study, we used genomic sequence data (SNPs) and spatially explicit individual-based analyses directly compare genetic structure patterns flow two mammals with different dispersal abilities occupy same urbanized landscape evaluate mobility impacts connectivity. We collected 215 white-footed mice (Peromyscus leucopus) 380 big brown bats (Eptesicus fuscus) across an urban-to-rural gradient within Providence, Rhode Island (U.S.A.) metropolitan area (population =1,600,000 people). found exhibit clear differences their spatial consistent abilities, having stronger effect on Peromyscus mice. There were sharp breaks Providence core, well reduced rates migration inbreeding more urbanization. contrast, showed very weak structuring entire study area, suggesting near-panmictic pool likely due ability disperse by flight. Genetic diversity remained stable for both region. Mice also exhibited reduction between island mainland than bats. This represents one first multiple gradient, important gap fill ecology evolution. Moreover, here document capacity connectivity have persisted matrix expands.