THE FOUNDER‐FLUSH SPECIATION THEORY: AN EXPERIMENTAL APPROACH

@article{Powell1978THEFS,
  title={THE FOUNDER‐FLUSH SPECIATION THEORY: AN EXPERIMENTAL APPROACH},
  author={Jeffrey R. Powell},
  journal={Evolution},
  year={1978},
  volume={32}
}
  • J. Powell
  • Published 1 September 1978
  • Biology
  • Evolution
Stemming from Mayr's (1942; 1954) concept of the "founder principle", Carson (1968; 1971; 1973; 1975) hasdeveloped a somewhat unorthodox theory of speciation. Briefly, Carson views the steps in species formation as follows. A population undergoes a rapid expansion ("flush") due to temporarily permissive conditions or sudden genotype changes due to migrants or newly arisen variants. This newly expanded population colonzies areas previously unoccupied by the species. Many of the newly colonized… 
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SEXUAL ISOLATION AMONG POPULATIONS OF DROSOPHILA MOJAVENSIS: RESPONSE TO PRESSURE FROM A RELATED SPECIES
TLDR
It is possible to imagine circumstances that would lead to the appearance of sexual isolation among allopatric populations without the need for a major reorganization of the genetic material.
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