EEB202H1 Lecture Notes - Lecture 9: Genetic Drift, Natural Product, Vincristine
3 Oct 2016
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Document Summary
Conservation biology is about both ecology and genetics. Lec9 species go extinct b/c they run out of habitat and/or genetic diversity a new applied sub-discipline. Study of species, ecological communities & ecosystems that are being negatively affected by human activities. Community-level studies habitat preservation to maintain species diversity application of island biogeographic theory to the design of nature reserves. Ex: forest fragmentation in warwickshire, england fragments have greater amount of edge per area of habitat centre of each fragment is closer to an edge - species living closer to the edge. Lec9 loss of genetic diversity through stochastic forces population bottlenecks - sharp reduction in # cause loss of diversity. 1 time event start a new population frequent pop bottlenecks founder effects - few individuals migrate/dispersed to somewhere else genetic drift - frequent fluctuations in size including very low numbers. Mating among relatives harmful to population size - reduced fitness loss of heterozygosity inbreeding depression fixation of deleterious genes.
