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Allopatric speciation



A speciation in which biological populations are physically isolated by an extrinsic barrier and evolve intrinsic (genetic) reproductive isolation, such that if the barrier breaks down, individuals of the population can no longer interbreed.


Allopatric speciation is speculated to be the most common way of species formation. A famous example of allopatric speciation is that of Charles Darwin's Galápagos Finches, another one involves the Asian Elephant.

Word origin: ancient Greek allos, other+ Greek patrā, fatherland.
Related forms: allopatry (noun).

Synonym: geographic speciation.
Compare: peripatric speciation, parapatric speciation, sympatric speciation.
See also: Genetic isolation, speciation.

User Contributions / Comments:

  • Two species of squirrels live on either side of the Grand Canyon. They are an example of allopatric speciaction.


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Help with Biology Question

... If the Lake copepods are, indeed, a new species, which mechanism of speciation most likely occurred: allopatric or sympatric speciation, and why?

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by killian07
Sun Dec 11, 2011 9:55 pm
Forum: General Discussion
Topic: Help with Biology Question
Replies: 2
Views: 1678

3 models for genetic isolation

... three models that bring about the genetic isolation of a population • Allopatric and sympatric speciation- Something happens (i.e. geographical isolation, ecological isolation) to a population ...

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by hannahzarzar
Wed Aug 31, 2011 5:31 am
Forum: Evolution
Topic: 3 models for genetic isolation
Replies: 1
Views: 3653

Common ancestor question

... isolated and its genes not passed on. A good mehcanism for evolution is allopatric speciation.

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by plasmodesmata11
Tue May 25, 2010 11:33 pm
Forum: Evolution
Topic: Common ancestor question
Replies: 5
Views: 8919

Re: Ancestor or Contemporary?

... of ancestors, Systematic Zoology 29:119-129; Lararus, 1983, Speciation in pelagic Protista and its study in the microfossil record: a ... The horse series in North America also shows examples of both allopatric and sympatric speciation between the Eocene and the Pleistocene ...

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by robsabba
Thu Apr 01, 2010 2:40 pm
Forum: Evolution
Topic: Ancestor or Contemporary?
Replies: 3
Views: 3077

Re: Wolf - Chihuahua - Great Dane: same species ?

... Here's an example with a fruit fly species: An experiment demonstrating allopatric speciation in the fruit fly (Drosophila pseudoobscura) conducted by Diane Dodd. A single population ...

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by robsabba
Wed Dec 02, 2009 3:57 pm
Forum: Evolution
Topic: Wolf - Chihuahua - Great Dane: same species ?
Replies: 12
Views: 14207
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