Understanding how gene flow affects population divergence and speciation remains
challenging. Differentiating one evolutionary process from another can be difficult because …

The allopatric model of biological speciation involves fracturing of a pre-existing species
distribution and subsequent genetic divergence in isolation. Accumulating global evidence …

How do we rigorously test for gene flow when the relationships among species are
uncertain? In this issue of Molecular Ecology, Beckman, Benham, Cheviron, and Witt (2018) …

In high-latitude species with high dispersal ability, such as long-distance migratory birds,
populations are often assumed to exhibit little genetic structure due to high gene flow or …

Species that inhabit naturally fragmented environments are expected to be spatially
structured and exhibit reduced genetic diversity at the periphery of their range. Patterns of …

Migration schedules and the timing of other annual events (eg, pair formation and molt) can
affect the distribution of genetic diversity as much as where these events occur. The greater …

Determining how genetic diversity is structured between populations that span the
divergence continuum from populations to biological species is key to understanding the …

The field of phylogeography continues to grow in terms of power and accessibility. Initially
uniting population genetics and phylogenetics, it now spans disciplines as diverse as …

Divergence with gene flow is well documented and reveals the influence of ecological
adaptation on speciation. Yet, it remains intuitive that gene exchange inhibits speciation in …

Phylogeography is experiencing a revolution brought on by next-generation sequencing
methods. A historical survey of the phylogeographic literature suggests that phylogeography …