Editing Allopatric speciation (section)

=== Centrifugal ===
[[Peripatric speciation#Centrifugal speciation|Centrifugal speciation]] is a variant, alternative model of peripatric speciation. This model contrasts with peripatric speciation by virtue of the origin of the genetic novelty that leads to reproductive isolation.<ref name="Gavrilets">{{Citation |title=Patterns of Parapatric Speciation | author=Sergey Gavrilets |display-authors=etal | journal=Evolution | year=2000 | volume=54 | issue=4 | pages=1126–1134 | doi=10.1554/0014-3820(2000)054[1126:pops]2.0.co;2| pmid=11005282 | citeseerx=10.1.1.42.6514 | s2cid=198153997 }}</ref> When a population of a species experiences a period of geographic range expansion and contraction, it may leave small, fragmented, peripherally isolated populations behind. These isolated populations will contain samples of the genetic variation from the larger parent population. This variation leads to a higher likelihood of ecological niche specialization and the evolution of reproductive isolation.<ref name="eLS2003"/><ref>{{Citation |title=Centrifugal speciation | author=W. L. Brown Jr. | journal=Quarterly Review of Biology | year=1957 | volume=32 | issue=3 | pages=247–277 | doi=10.1086/401875| s2cid=225071133 }}</ref> Centrifugal speciation has been largely ignored in the scientific literature.<ref name="Briggs">{{Citation |title=Centrifugal speciation and centres of origin | author=John C. Briggs | journal=Journal of Biogeography | year=2000 | volume=27 | issue=5 | pages=1183–1188 | doi=10.1046/j.1365-2699.2000.00459.x| bibcode=2000JBiog..27.1183B | s2cid=86734208 }}</ref><ref name="Gavrilets" /><ref>{{Citation |title=Modes of Peripheral Isolate Formation and Speciation | author=Jennifer K. Frey | s2cid=32546573 | journal=Systematic Biology | year=1993 | volume=42 | issue=3 | pages=373–381 | doi=10.1093/sysbio/42.3.373}}</ref> Nevertheless, a wealth of evidence has been put forth by researchers in support of the model, much of which has not yet been refuted.<ref name="eLS2003"/> One example is the possible [[center of origin]] in the [[Indo-Pacific|Indo-West Pacific]].<ref name="Briggs" />