New gene pools are generated in every generation, and evolution takes place because the successful individuals produced by these gene pools give rise to the next generation.
More Quotes from Ernst Mayr:
I did not claim that speciation occurs only in founder populations.Ernst Mayr
Living in an entirely different physical as well as biotic environment, such a population would have unique opportunities to enter new niches and to select novel adaptive pathways.
Ernst Mayr
Most of them are doomed to rapid extinction, but a few may make evolutionary inventions, such as physiological, ecological, or behavioral innovations that give these species improved competitive potential.
Ernst Mayr
I did not claim that every genetic change in a founder population is a genetic revolution. Evidently it requires a special constellation for the occurrence of a more drastic genetic reorganization.
Ernst Mayr
Life is simply the reification of the process of living.
Ernst Mayr
I have been unable to discover in Darwin's writings any connection between allopatric speciation and change of evolutionary rate.
Ernst Mayr
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