Adaptive radiation is used to describe periods characterized by very high speciation rates.
The rapid increase in the number of species with a common ancestor, characterized by high ecological and morphological diversity, is called adaptive radiation. It is driven by the organism's ability to adapt to new ecological conditions.
Adaptive radiation is involved in Galapagos finch diversity. Their beaks changed in size and shape during evolution to allow them to adapt to different diets. Some species feed primarily on animals, while others prefer seeds and plants.
Some forage in trees, others on the ground. Diversity in environment and food choices has driven the rapid differentiation of these finch species. All these species descended from a single common ancestor and today display ecological and phenotypic diversity.
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