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Unformatted text preview: April 29, 2008 Notes Conservation biology integrates these fields: • Ecology • Evolutionary biology • Physiology • Molecular biology • Genetics • Animal behavior-Goal of conservation biology is to conserve biological diversity at all levels The biodiversity crisis • Scientist described 1.8 million species • Between 10-200 million undescribed species • Not evenly distributed • Tropical forests have highest number of species and are undergoing widespread destruction o Example: between 1990 and 2005, Brazil cleared over 42 million hectares, an area the size of California • The 6 th mass extinction on Earth? o Current extinction rates estimated to be 1000 times higher than in the past 100,000 years Human activities threaten biodiversity • Rates of species extinction are difficult to determine under natural conditions o Because humans impact nearly everything o If we don’t know how many species there are to begin with, we don’t know how many we are really driving away o We don’t always know where to look to see if they are actually extinct •...
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This note was uploaded on 04/26/2009 for the course EBIO 1220 taught by Professor Demig-addams during the Spring '07 term at Colorado.
- Spring '07