Abstract
Rare long distance dispersal may have little impact on gene frequencies in established populations but it can dramatically increase gene flow during episodes of range expansion. We model the invasion of new territory by genetically distinct populations of the same species to investigate the dynamics of such episodes. If long distance dispersal is sufficiently frequent, the populations do not spread as a wave of advance but instead found intermingled isolates. We argue that this process can explain many otherwise puzzling patterns in the geographical distribution of alleles.
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Nichols, R., Hewitt, G. The genetic consequences of long distance dispersal during colonization. Heredity 72, 312–317 (1994). https://doi.org/10.1038/hdy.1994.41
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DOI: https://doi.org/10.1038/hdy.1994.41
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