Among evolutionary biologists the idea of sympatric speciation is controversial.

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Sympatric speciation proposes that new species arise within the same geographic region, without any physical or geographical barriers preventing gene flow. While some evolutionary biologists support this idea, it remains controversial as there is limited evidence to support it and alternative mechanisms of speciation, such as allopatric speciation, are better understood and more widely accepted.

Among Evolutionary Biologists the Idea of Sympatric Speciation Is Controversial