ecological speciation. A lack of strong examples for ... at a locus causes no reduction in fitness on its own genetic background, but leads to reduced fitness when placed on the alternative ...

The biological equivalent is "allopatric speciation," an evolutionary process in which one species divides into two because the original homogenous population has become separated and both groups ...

Indeed, the Galapagos have been called a living laboratory where speciation can be seen at work. A few million years ago, one species of finch migrated to the rocky Galapagos from the mainland of ...

What is unknown is whether such local ‘adaptations' are correlated with genetic differentiation, which is a necessary precursor to speciation. Future studies that incorporate ecological ...