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- W143766998 abstract "Allopatric speciation, also known as geographic speciation, is speciation that occurs when biological populations of the same species become isolated due to geographical changes such as mountain building or social changes such as emigration. In the neo-Darwinian era, the species was universally recognized as the fundamental taxonomic unit of evolution. One of the most widely accepted concepts of species is the biological species concept (BSC). According to the BSC, allopatrically formed species are postzygotically isolated, i.e., even when they secondarily come in contact and can interbreed, they are incapable of producing fertile hybrids. This chapter describes the various theories for verification of allopatric models of evolution, such as the basic allopatric model, the reinforcement model, and divergence-with-gene-flow model. However, evidence has shown that many well-established vertebrate and invertebrate species are reproductively not isolated. Also, from the neo-Darwinian perspective, formation of new species and higher taxa was seen as nothing more than an extension, or an unavoidable finalization, of the process of gradual accumulation of microevolutionary (mutational) changes in genes. Darwinian evolutionists distinguished between two main forms of speciation, allopatric speciation, taking place under conditions of spatial isolation of populations, and sympatric speciation, occurring within populations sharing the same habitat. In this light, the study illustrates peripatric evolution using models such as the founder effect model and the bottleneck model. Finally, it sheds light on the phenomenon of ecological separation." @default.
- W143766998 created "2016-06-24" @default.
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- W143766998 date "2012-01-01" @default.
- W143766998 modified "2023-09-25" @default.
- W143766998 title "Species and Allopatric Speciation" @default.
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- W143766998 doi "https://doi.org/10.1016/b978-0-12-415831-3.00018-5" @default.
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