BIOL 3040 Lecture Notes - Apoyo Lagoon Natural Reserve, Chromosome, Genetic Drift
Document Summary
14. 1 the species problem: define and evaluate the pros and cons of the following species concepts, evolutionary species concept. Draws species boundaries around clusters of phenotypically similar individuals or populations: pros: helps to delineate species boundaries, cons: no way of weighing the relative importance of characters or traits used to delineate species boundaries. A species is composed of groups of actually or potentially interbreeding populations which are reproductively isolated from other such groups: pros: uses the pattern of gene flow to determine species boundaries. Delineates species by properties possessed by populations: cons: hard to apply this concept to extinct species. And the occasional hybridization events between individuals in populations that are reproductively isolated. Finally, it is restricted to sexual species: phylogenetic species concept derived character. Species is the smallest monophyletic group distinguished by a shared: pros: determines an appropriate taxonomic level at which to draw species boundaries.
