Conservation Bio Main Points 9-12-07

Conservation Bio Main Points 9-12-07 - Conservation Bio...

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Conservation Bio Main Points 9-12-07 Discussion Section: WLH11520 Allopatric speciation model o Generally, physical isolation is a prelude to species formation o Genetic divergence in allopatry sufficient such that if the populations were to re- establish contact, hybrids would not be formed, or if formed they would be eliminated. Islands also contribute to produce new species Endemics: Species found in very limited areas Habitat fragmentation o May lead to extinction of species in some parts of the range o Could lead to genetic divergence o Enough times perhaps could be a prelude to speciation Problems with Biological species concept o Applicability o Hybridization: Occurs in nature, especially in plants o Asexual (microbes): o Paleontology Alternative: Phylogenetic species concept o Species are the smallest “diagnosable’ cluster in a phylogeny-parental ancestry and descent Conserve biological diversity rather than Latin binomials
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Conservation Bio Main Points 9-12-07 - Conservation Bio...

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