allopatric speciation


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allopatric speciation

[¦al·ō¦pa·trik ‚spē·sē′ā·shən]
(ecology)
Differentiation of populations in geographical isolation to the point where they are recognized as separate species.
References in periodicals archive ?
In this study, we put forward the hypothesis that the four species within the Ceratozamia norstogii complex, despite the low genetic variability between them, probably have originated from a genetically depauperate ancestor through an allopatric speciation process, resulting from recent divergence due to genetic drift via founder effects.
The Refuge hypothesis refers to a particular mode of allopatric speciation, but not to a particular time of differentiation.
Timing of this speciation event is therefore consistent with (but not proof of) allopatric speciation (Table 3).
The potential for allopatric speciation at zoogeographic boundaries and the evolutionary role that zoogeographic barriers play in the generation of biological diversity is frequently discussed (Addicott 1966; Valentine and Jablonski 1983, 1993; Avise 1994; Rosenzweig 1995).
Although the importance of allopatric speciation has long been recognized, community ecologists have been surprisingly silent about how ecological interactions in general and species interactions in particular could influence the potential for allopatric speciation.
If it is not, then the possibility exists that geographic or allopatric speciation has occurred, allowing sympatric coexistence in southern California.
The author pulls no punches about his own position, stating clearly at the outset that "This book is written about the two most common forms of speciation in bisexual plants and animals, the non-chromosomal forms of allopatric speciation and the processes of chromosomal speciation" (p.
The patterns of variation in hybrid zones were among the important factors that led systematists with an interest in evolutionary processes to articulate the biological species concept and to develop arguments for the ubiquity of allopatric speciation, the coadaptation of species' gene pools, and the origin and nature of reproductive isolation (Mayr 1963).
Although evidence for these heroic journeys is scant, Mayr (1963) concluded that allopatric speciation rarely occurs in freshwater plankton.
A model for divergent, allopatric speciation of polyploid pteridophytes resulting from silencing of duplicate-gene expression.
1980, Genetic variation and phenotypic evolution during allopatric speciation.
The view that allopatric speciation is the predominant mode of speciation in animals seems firmly established (Mayr 1942, 1963).