Parapatric speciation
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In parapatric speciation, two subpopulations of a species evolve reproductive isolation from one another while continuing to exchange genes. This mode of speciation has three distinguishing characteri
Anthoxanthum odoratum
Darwin's finches by Gould
Ecological speciation
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Ecological speciation is a form of speciation arising from reproductive isolation that occurs due to an ecological factor that reduces or eliminates gene flow between two populations of a species. Eco
Three-spined stickleback fish have been a frequently studied species in ecological speciation.
The western American sagebrush Artemisia tridentata
Transition of hybrid forms between the white A. pubescens and the red-and-yellow A. formosa