Geographical Isolation Doesn't Drive Evolution?

A new study of island lizards suggests that geographical isolation may not be as important to evolution as previously thought. The new research, published in PLoS Genetics, shows that even those lizards that have been geographically isolated for many millions of years have not evolved into separate species as predicted by conventional evolutionary theory. The findings reject allopatric speciation in a case study from a system thought to exemplify it, the researchers say, and suggest the potential importance of speciation due to differences in ecological conditions (ecological speciation).   read more

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