25 - Taxonomists/Systematists work with the identification,...

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Taxonomists/Systematists work with the identification, nomenclature, and classification of species. Species Concepts Given in class: Practical : unit considered a species by a competent taxonomist Morphological : group of individuals with the same or similar morphology Problems: convergent evolution, sibling species, mimics, philosophical (what character is most Genetic: a group of individuals genetically similar at all loci (sites on a chromosome where a particular gene is found) Biological : can actually or potentially interbreed in natural populations and are reproductively isolated from other such groups Key: ability to interbreed What separates: reproductive isolation In reality, taxonomists/systematists do the best they can with what they have. Given in book: Phylogenetic species concept : physical characteristics, such as morphological (anatomical) and molecular traits Biological species concept : interbreed to produce viable, fertile offspring Evolutionary species concept : a species is derived from a single lineage that is distinct from other
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This note was uploaded on 04/14/2008 for the course BIOL 115 taught by Professor Diggs during the Fall '07 term at Austin College.

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25 - Taxonomists/Systematists work with the identification,...

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