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15 BISC_120 ConsGen

15 BISC_120 ConsGen - Exam 1 on Wednesday(Sept 29 During...

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1 Exam 1 on Wednesday! (Sept 29) During lecture period 9am- Stephanie & Yichun’s students in THH 212, everyone else in THH 101 10am-Jessica, Helen & Mona’s students in THH 102, everyone else in THH 101 9am students must take the 9am exam, 10am students must take the 10am exam Covers lectures 3-14 (Edmands) Multiple choice, matching, true/false, definitions, problem solving, and one essay Bring a pencil, a pen and your USC ID card No calculators or cell phones Set your alarms!!!!!!!! 56.1, 56.2 Conservation Genetics 3 • Conservation biology is a young field that integrates: – Ecology – Behavioral ecology – Physiology – Molecular biology – Genetics – Evolution Conservation Genetics The field of Conservation Biology has grown in response to concerns over loss of biodiversity 4
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Source: IUCN 6 Why preserve biodiversity? 1. For its own sake. 7 Why preserve biodiversity? 2. For our own sake. Pacific Yew Tree ( Taxus brevifolia) We can’t afford to lose biodiversity! Loss of biodiversity has economic costs due to loss of ecosystem services such as - pollination, - nutrient cycling - purification of air and water - detoxification and decomposition of wastes - moderation of weather extremes
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9 What are the greatest threats to biodiversity? • Habitat loss • Introduced species • Overexploitation Habitat Loss Source: NSIDC, 2010 Extent of Arctic sea ice 11 Introduced Species 12 Overexploitation 25% of world fish stocks overexploited, 52% fully exploited -U.N. Food & Agriculture Org. (FAO), 2009
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13 How is genetics used to aid conservation? 1. Diagnose populations or species at genetic risk 2. Prioritize populations or species worthy of protection 14 1. Diagnose populations or species at genetic risk 15 Small populations may be at genetic risk due to: • Inbreeding depression • Low genetic variation 16
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