Allopatric speciation
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Allopatric speciation is a mode of speciation that occurs when biological populations become geographically isolated from each other to an extent that prevents or interferes with gene flow. Its name c
A female cobalt blue zebra cichlid
Ernst Mayr in 1994
Darwin's finches by Gould
Sympatry
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In biology, two closely related species or populations are considered sympatric when they exist in the same geographic area and thus frequently encounter each other. An initially interbreeding populat
Allopatric speciation
…used to refer to modes of speciation directly reflected biogeographical distributions. As such, allopatry is a geographical distribution opposed to sympatry (speciation within the same area). Furthermore, the terms allopatric, vicariant, and geographical speciation are often used interchangeably in the…
Sympatric pitcher plants, Nepenthes jamban (left) and Nepenthes lingulata (right) in Sumatran upper montane forest
Great spotted cuckoo, sympatric with the magpie
Triturus Cristatus First Year Male First Year
Triturus marmoratus 2