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Review Questions Quiz 3_2009

Review Questions Quiz 3_2009 - Study Guide for Quiz 3 Be...

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Study Guide for Quiz 3 Be able to define and/or give an example of each of the following concepts or vocabulary words Chapter 9 1. Dangers facing small populations: a. Genetic: i. Population bottleneck: genetic variability becomes so small it can reduce a species adaptability, even if the population grows large again ii. Inbreeding depression: when individuals of a small population only mate with each other causing genetic diseases 1. Hemophilia: to preserve royal blood lines, individuals were encouraged to marry cousins. Hemophilia is a disease where the clotting factor in blood does not work b. Random events: unexpected or unpredictable events that can have dramatic effects on population numbers i. Environmental fluctuations: drought, fire, hurricanes, floods; all natural part of ecosystem. But if species has low population number, natural occurrences can wipe out a population in the blink of an eye 2. Population Viability Analysis (PVA): a statistical method used to assess risk of extinction; an attempt to determine if a species has the ability to persist in a given environment 3. Minimum viable population size (MVP): the smallest population size that has 99% chance of remaining not going extinct for 1000 years. The fewest number of individuals of a species that can maintain a population for the foreseeable future 4. Be able to compare and contrast Ex-situ Conservation and In-situ Conservation methods and techniques a. Ex-situ conservation: when species has reached it MVP, ex-situ is needed. Is essentially taking species out of its place; creating captive breeding programs
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b. In-situ conservation: creating protected areas (reserves), there are different types (partial, extractive) 5. Species Conservation: conservation specifically for one species, very difficult to find large plots of land free of human interaction to preserve a single species. Establishments of extractive or multi- use reserves have now been created 6. Community Conservation: alternative to strictly species conservation and to focus on protection efforts on an entire habitat or community 7. Landscape Conservation: large natural areas are more likely to protect diverse communities of species and their ecosystems than small ones 8.
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