Sentences with phrase «vicariance in»

The new study compares the theories of jump dispersal and vicariance in a new computational program developed by Nicholas J. Matzke, a postdoctoral fellow at the National Institute for Mathematical and Biological Synthesis.

Not exact matches

Yet, in many cases, statistical dating of evolutionary events indicated that the breakup of land masses occurred tens of millions of years before some species» ancestors evolved, bringing into question the validity of vicariance methods.

The fact that the SNPs used for each of these loci fall on the branch uniting divergent haplogroups, which is consistent with ancient vicariance and reciprocal monophyly being attained in the past before hybridization took place, suggests that high levels of admixture may have eroded any clinal differentiation in HPRT1.

There could be three evolutionary processes could explain this adaptive radiation of hominins: 1) the occupation of novel niches for species living in a highly productive but spatially constrained region when there are deep fresh water lakes in the EARS [46] and 2) the lakes themselves creating spatial structure producing population isolation and vicariance and 3) repeated periods of increased resource availability stimulated adaptation and radiation followed by periods of environmental stress when the lakes rapidly dried up imposing strong selection pressures [28].