BIOL 302 Lecture Notes - Lecture 15: Reproductive Isolation, Speciation, Allopatric Speciation
24 Oct 2017
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Bio302 (lec 15) october 18th, 2017: population & evolutionary ecology. Phylogenies: note: looking at phylogenies on the axis of time. What"s so spe(cid:272)ial a(cid:271)out spe(cid:272)ies? (cid:894)(cid:271)iologi(cid:272)ally(cid:895: specificity, distinction, ex. In their relationship to their environment and other species: reproduce [reproductive isolation, viable offspring, pass on their genes, allows you to evolve adaptations, local diversity (live together) Species are evolutionary distinct entities of biological importance: the door to gene exchange has been mostly shut, potential for adaptive evolution along independent evolutionary trajectories can coexist increasing local diversity. What is a species: why are they hard to categories, 2 widely used definitions: biological species concept, biological species concept: one or more pop. Some sort of genetic isolation: for bsc, the evolutionary history does not matter! If all pop. are diagnosable different, name all phylogenetic species: ex. Here this would be 7 distinct species (pic)
