13_ConsGen

13_ConsGen - Conservation Genetics 55.1, 55.2 and R4...

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55.1, 55.2 and R4 Conservation Genetics
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2 Conservation biology is a young field that integrates: Ecology Behavioral ecology Physiology Molecular biology Genetics Evolution Conservation Genetics
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3 Conservation biology has grown rapidly in response the biodiversity crisis Some depressing statistics Nearly 50% of land surface has been altered by humans About 75% of marine fisheries are fully exploited or overexploited – We have increased atmospheric CO 2 concentrations by 30% Rate of species loss may be as much as 1000x higher than at any point in the past 100,000 years
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Genetic diversity in a vole population Species diversity in a coastal redwood ecosystem Community and ecosystem diversity across the landscape of an entire region Genetic diversity Genetic variation within and between populations Species diversity The number and relative abundance of species Ecosystem diversity The diversity of habitats, communities and ecological processes
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5 Why preserve biodiversity? 1. For its own sake.
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6 Why preserve biodiversity? 2. For our own sake. Rosy periwinkle Pacific Yew Tree
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7 Biodiversity particularly important for ecosystem services Pollination, nutrient cycling, purification of air and water, detoxification and decomposition of wastes, moderation of weather extremes Worth ~$33 trillion a year!
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8 Four Major Threats to Biodiversity Habitat destruction Introduced species Overexploitation Disruption of “interaction networks”
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9 Habitat Destruction California Gnatcatcher Coastal sage scrub habitat
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10 Over 90% of the big fish are gone? ( Nature 2003) Overexploitation
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11 Introduced Species
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12 Disruption of Interaction Networks Extermination of one species can doom others
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How is genetics used to aid conservation? 1. Diagnose populations or species at
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13_ConsGen - Conservation Genetics 55.1, 55.2 and R4...

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