Intrinsic postzygotic barriers can play an important and multifaceted role in speciation, but
their contribution is often thought to be reserved to the final stages of the speciation process …

Coupling has emerged as a concept to describe the transition from differentiated
populations to newly evolved species through the strengthening of reproductive isolation …

The transition from 'well-marked varieties' of a single species into 'well-defined species'—
especially in the absence of geographic barriers to gene flow (sympatric speciation)—has …

Adaptive radiations represent some of the most remarkable explosions of diversification
across the tree of life. However, the constraints to rapid diversification and how they are …

During the process of speciation, populations may diverge for traits and at their underlying
loci that contribute barriers to gene flow. These barrier traits and barrier loci underlie …

Predicting evolution remains difficult. We studied the evolution of cryptic body coloration and
pattern in a stick insect using 25 years of field data, experiments, and genomics. We found …

The significance of prezygotic isolation for speciation has been recognized at least since the
Modern Synthesis. However, fundamental questions remain. For example, how are genetic …

Genome re-arrangements such as chromosomal inversions are often involved in adaptation.
As such, they experience natural selection, which can erode genetic variation. Thus …

Speciation is a key evolutionary process that is not yet fully understood. Combining
population genomic and ecological data from multiple diverging pairs of marine snails …

As is true of virtually every realm of the biological sciences, our understanding of speciation
is increasingly informed by the genomic revolution of the past decade. Investigators can ask …