Ecologically mediated selection against hybrids, caused by hybrid phenotypes fitting poorly
into available niches, is typically viewed as distinct from selection caused by epistatic …

Although intrinsic postzygotic reproductive barriers can play a fundamental role in
speciation, their underlying evolutionary causes are widely debated. One hypothesis is that …

Intrinsic hybrid incompatibility is one of the important reproductive isolating barriers between
species. Several genes causing intrinsic hybrid incompatibilities have been identified over …

Speciation research—the scientific field focused on understanding the origin and diversity of
species—has a long and complex history. While relevant to one another, the specific goals …

Understanding patterns of diversification necessarily requires accounting for both the
generation and the persistence of species. Formal models of speciation genetics, however …

Speciation is not an event but a process, and one that may take a very long time. It can be
helpful to think about a “speciation continuum,” either in one dimension (reproductive …

The process of reproductive character displacement involves divergence and/or the
narrowing of variance in traits involved in species recognition, driven by interactions …

I examine the spatial processes that shape species formation in adaptive radiation, and
patterns that emerge from the different processes. I first consider situations that set the stage …

Climate change is altering species ranges and reproductive interactions in existing ranges,
offering species new scope to mate and hybridize. The outcomes will depend on how …

Behavioral mating choices and mating success are important factors in the development of
reproductive isolation during speciation. Environmental conditions, especially temperature …