Sympatric speciation has been of key interest to biologists investigating how natural and
sexual selection drive speciation without the confounding variable of geographic isolation …

Sympatric speciation is among the most controversial and challenging concepts in evolution.
There are a multitude of definitions of speciation alone, and when combined with the …

Understanding the processes underlying the origin of species is a fundamental goal of
biology. It is widely accepted that speciation requires an interruption of gene flow between …

The study of genetic exchange resulting from natural hybridization, horizontal gene transfer,
and viral recombination has long been marked by controversy between researchers holding …

In addition to the classic allopatric model of speciation in which two lineages diverge
through time, a population may “bud off” from an ancestral population and become adapted …

Microgeographical adaptation occurs when the effects of directional selection persist despite
gene flow. Traits and genetic loci under selection can then show adaptive divergence …

Speciation remains a central enigma in biology, and nowhere is this more apparent than in
shallow tropical seas where biodiversity rivals that of tropical rainforests. Obvious barriers to …

Microbes can have profound effects on their hosts, driving natural selection, promoting
speciation and determining species distributions. However, soil‐dwelling microbes are …

Abstract Models predict that sympatric speciation depends on restrictive parameter ranges,
such as sufficiently strong disruptive selection and assortative mating, but compelling …

It is now recognized that speciation can proceed even when divergent natural selection is
opposed by gene flow. Understanding the extent to which environmental gradients and …