BILD 3 Lecture Notes - Lecture 5: Character Displacement, Adaptive Radiation, Selective Breeding
26 Oct 2018
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Clicker question: your book discussed the patterns we see in the fossil record leading to modern cetaceans (whales, dolphins, and porpoises). Adaptive radiation: the diversification of species originating from a common ancestor to fill a wide variety of ecological niches. Pattern is seen from both processes of local adaptation and character displacement local adaption of different environments leads to genetic diversity if a species goes back to the beginning island, there are 2 similar species present. There is competition among the overlapping characteristics, so natural selection is enforced in opposite directions to reduce competition. Known as character displacement, which also contributes to genetic diversity: adaptive radiation can occur in both natural selection and artificial selection, where branching and diversification can occur. Evolution (change over time; change in heritable traits/gene pool), (cid:449)asn"t the (cid:272)onsensus, but was an old concept during dar(cid:449)in"s time: dar(cid:449)in"s ne(cid:449) insight: mechanism for evolution is natural selection (also proposed by.
