Skip to main content
Select Source:

area-effect speciation

area-effect speciation Speciation by the increased differentiation of two subspecies with incompatible gene complexes, so that selection is strongly against hybrids. The phenomenon is observed among slow-moving or sedentary organisms (e.g. snails and plants) occupying areas of habitat that remain unchanged for long periods (sometimes thousands of years) and within which stable local populations of particular polymorphs occur. As a result of strong selection for certain loci (see locus), particular alleles become more frequent, together with those genes that are compatible with them, thus forming gene complexes and consequent heterogeneity among the polymorphic populations. The fecundity of hybrids is low and a steep cline develops, sometimes over a distance of metres.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"area-effect speciation." A Dictionary of Ecology. . Encyclopedia.com. 28 Jun. 2017 <http://www.encyclopedia.com>.

"area-effect speciation." A Dictionary of Ecology. . Encyclopedia.com. (June 28, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/area-effect-speciation

"area-effect speciation." A Dictionary of Ecology. . Retrieved June 28, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/area-effect-speciation

area-effect speciation

area-effect speciation Speciation that is associated with an increased differentiation of two subspecies that have incompatible gene complexes, so that hybrids are strongly selected against.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"area-effect speciation." A Dictionary of Zoology. . Encyclopedia.com. 28 Jun. 2017 <http://www.encyclopedia.com>.

"area-effect speciation." A Dictionary of Zoology. . Encyclopedia.com. (June 28, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/area-effect-speciation-1

"area-effect speciation." A Dictionary of Zoology. . Retrieved June 28, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/area-effect-speciation-1

area-effect speciation

area-effect speciation The speciation by increased differentiation of two subspecies with incompatible gene-complexes, so that selection is strongly against hybrids.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"area-effect speciation." A Dictionary of Plant Sciences. . Encyclopedia.com. 28 Jun. 2017 <http://www.encyclopedia.com>.

"area-effect speciation." A Dictionary of Plant Sciences. . Encyclopedia.com. (June 28, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/area-effect-speciation-0

"area-effect speciation." A Dictionary of Plant Sciences. . Retrieved June 28, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/area-effect-speciation-0