Speciation is the evolutionary process by which populations evolve to become distinct species. The biologist Orator F. Cook coined the term in for cladogenesis , the splitting of lineages, as opposed to anagenesis , phyletic evolution within lineages. There are four geographic modes of speciation in nature, based on the extent to which speciating populations are isolated from one another: allopatric , peripatric , parapatric , and sympatric. Speciation may also be induced artificially, through animal husbandry , agriculture, or laboratory experiments.
Speciation , the formation of new and distinct species in the course of evolution. Speciation involves the splitting of a single evolutionary lineage into two or more genetically independent lineages. In eukaryotic species—that is, those whose cells possess a clearly defined nucleus —two important processes occur during speciation: the splitting up of one gene pool into two or more separated gene pools genetic separation and the diversification of an array of observable physical characteristics phenotypic differentiation in a population see population ecology.
Last Updated on May 24, by Sagar Aryal. Speciation is the process of formation of a new genetically independent group of organisms, called species, through the course of evolution. Image Source: Wikipedia Ilmari Karonen. Table of Contents hide. Speciation Definition.
This page has been archived and is no longer updated. Discussion of most topics within Evolutionary Biology begins with Darwin. Darwin viewed evolution by natural selection as a very gradual mechanism of change within populations, and postulated that new species could be the product of this very same process, but over even longer periods of time.