allopatric speciation

(redirected from Vicariant speciation)
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allopatric speciation

A process in which two or more populations of the same (but geographically separated and non-interbreeding) species become less similar to each other over time, through mutation or survival advantages of different traits in differing environments, and eventually become distinct species.
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allopatric speciation

the genetic differentiation of populations which are geographically separate to the point where they become separate SPECIES.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
All other cases involving range overlap of less than 20% were termed vicariant speciation events.
Peripheral Indeter- Genus N Vicariance isolates Sympatric minate Phalaropus 2 1 0 1 0 Platycercus 5 3 0 1 1 Pteroglossus 2 2 0 0 0 Ramphastos 3 1 0 1 1 Sphyrapicus 3 2 0 0 1 Gymnopithys 3 3 0 0 0 Iodopleura 2 2 0 0 0 Diglossa 3 1 1 0 1 Melospiza 2 0 0 1 1 Ammodrammus 8 2 0 2 4 Zonotrichia 4 1 0 1 2 Pipilo 3 1 0 1 1 Molothrus 4 1 0 1 2 TOTAL 44 20 1 9 14 As percentage of total 100.0 45.4 2.3 20.5 31.8 For the 13 lineages, 45.4% of the speciation events were determined to be vicariant speciation, 2.3% peripheral isolates speciation, 20.5% sympatric speciation, and 31.8% were indeterminate.