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EspañolPARAPATRIC SPECIATION
(Redirected from Parapatric)
'Parapatric speciation' is a form of speciation that occurs due to variations in mating frequency of a population within a continuous geographical area.
In this model, the parent species lives in a continuous habitat, in contrast with allopatric speciation where subpopulations become geographically isolated.
Niches in this habitat can differ along a environmental gradient, hampering gene flow, and thus creating a cline.
An example[1] of this is the grass ''Anthoxanthum'', which has been known to undergo parapatric speciation in such cases as mine contamination of an area. This creates a selection pressure for resistance/tolerance to those metals. Flowering time generally changes (in an attempt at character displacement—strong selection against interbreeding—as the hybrids are generally ill-suited to the environment) and often plants will become self-pollinating.
Another example is ring species.
★ Adaptive radiation
★ Evolutionary radiation
★ Cladistics
★ Phylogenetics
★ Taxonomy
1. "Evolution in closely adjacent plant populations X: long-term persistence of pre-reproductive isolation at a mine boundary." Heredity. 2006 Jul;97(1):33-7. Epub 2006 Apr 26. Abstract.
"Parapatric speciation." in ''Understanding Evolution'' at evolution.berkeley.edu
'Parapatric speciation' is a form of speciation that occurs due to variations in mating frequency of a population within a continuous geographical area.
In this model, the parent species lives in a continuous habitat, in contrast with allopatric speciation where subpopulations become geographically isolated.
Niches in this habitat can differ along a environmental gradient, hampering gene flow, and thus creating a cline.
An example[1] of this is the grass ''Anthoxanthum'', which has been known to undergo parapatric speciation in such cases as mine contamination of an area. This creates a selection pressure for resistance/tolerance to those metals. Flowering time generally changes (in an attempt at character displacement—strong selection against interbreeding—as the hybrids are generally ill-suited to the environment) and often plants will become self-pollinating.
Another example is ring species.
| Contents |
| See also |
| References |
See also
★ Adaptive radiation
★ Evolutionary radiation
★ Cladistics
★ Phylogenetics
★ Taxonomy
References
1. "Evolution in closely adjacent plant populations X: long-term persistence of pre-reproductive isolation at a mine boundary." Heredity. 2006 Jul;97(1):33-7. Epub 2006 Apr 26. Abstract.
"Parapatric speciation." in ''Understanding Evolution'' at evolution.berkeley.edu
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