a small population of deer is introduced to an island?

Disruptive selection, starting off with a homogenous population, they eventually breed out into distinctive subgroups. on an island this may be because the limited resources means they have to specialize and find niches. The first step in speciation, and one of the reasons islands have the highest species densities


Disruptive selection, also called diversifying selection, is a descriptive term used to describe changes in population genetics when selection favors the extreme trait values over the intermediate trait values. In this case the variance increases as the population is divided into two distinct groups. Disruptive selection plays an important role in speciation.