Hybridization has many and varied impacts on the process of speciation. Hybridization may
slow or reverse differentiation by allowing gene flow and recombination. It may accelerate …

Defining the impacts of anthropogenic climate change on biodiversity and species
distributions is currently a high priority. Niche models focus primarily on predicted changes …

2014; Grant and Grant, 2015; Abbott et al., 2016; Pennisi, 2016). Homoploid hybrid
speciation (HHS) is the formation of a newhybrid—species, independent from its parents, via …

Sexual reproduction is a fundamental aspect of life. It is defined by the occurrence of meiosis
and the fusion of two gametes of different sexes or mating types. Sex-determination …

Hybridization is widespread in nature and, in some instances, can result in the formation of a
new hybrid species. We investigate the genetic foundation of this poorly understood process …

Abstract Theory and empirical patterns suggest a disproportionate role for sex chromosomes
in evolution and speciation. Focusing on ZW sex determination (females ZW, males ZZ; the …

Hybrid speciation is rare in vertebrates, and reproductive isolation arising from hybridization
is infrequently demonstrated. Here, we present evidence supporting a hybrid-speciation …

Homoploid hybrid speciation is thought to require unusual circumstances to yield
reproductive isolation from the parental species, and few examples are known from nature …

House sparrows (Passer domesticus) are a hugely successful anthrodependent species;
occurring on nearly every continent. Yet, despite their ubiquity and familiarity to humans …

Studies of reproductive isolation between homoploid hybrid species and their parent
species have rarely been carried out. Here we investigate reproductive barriers between a …