Concepts and definitions of species have been debated by generations of biologists and
remain controversial. Microbes pose a particular challenge because of their genetic …

Abstract Since Darwin published the “Origin,” great progress has been made in our
understanding of speciation mechanisms. The early investigations by Mayr and Dobzhansky …

Speciation has been a major focus of evolutionary biology research in recent years, with
many important advances. However, some of the traditional organising principles of the …

Speciation has been a major focus of evolutionary biology research in recent years, with
many important advances. However, some of the traditional organising principles of the …

Summary Rieseberg, LH & Burke, JM: The biological reality of species: gene flow, selection,
and collective evolution.–Taxon 50: 47–67.–ISSN 0040–0262. Some authors have claimed …

This chapter reviews current understanding of the genetic basis of speciation. Much
progress has been made in the past several decades in uncovering how new species arise …

Microbial species concepts have long been the focus of contentious debate, fueled by
technological limitations to the genetic resolution of species, by the daunting task of …

A problem in understanding sympatric speciation is establishing how reproductive isolation
can arise when there is disruptive selection on an ecological trait. One of the solutions that …

Divergent natural selection has been shown to promote speciation in many taxa. However,
although divergent selection often initiates the process of speciation, it often fails to complete …

Ecological processes are central to the formation of new species when barriers to gene flow
(reproductive isolation) evolve between populations as a result of ecologically‐based …