Biodiversity

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Biodiversity

  1. 1. Biodiversity
  2. 2. Biodiversity <ul><li>Evolution has provided a great diversity of life on Earth </li></ul><ul><li>Ecosystems are populated by many species with their own niches </li></ul>
  3. 3. What is biodiversity? <ul><li>A measurement of the degree to which species vary in an ecosystem </li></ul><ul><li>More biodiversity usually means more stability </li></ul>
  4. 4. Ecosystem Stability <ul><li>In an established ecosystem, population sizes tend to increase and decrease in predictably </li></ul><ul><li>Over time they remain stable </li></ul><ul><li>Species interact and depend on each other </li></ul>
  5. 5. Loss of biodiversity <ul><li>Upsets stability </li></ul><ul><li>Loss of a population that fills a niche </li></ul><ul><li>May be catastrophic to the ecosystem </li></ul>
  6. 6. Loss of biodiversity <ul><li>May take many years for the environment to return to its former self </li></ul><ul><li>Interactions between some species may have been so great that they may never return </li></ul>
  7. 7. For example <ul><li>Kaibab Deer: No Predators  Population Explosion  Food Supply Shortage  Starvation </li></ul><ul><li>But this had other effects on the environment </li></ul>
  8. 8. Farming
  9. 9. Biodiversity and Humans <ul><li>Variety of genetic material that may prove valuable. </li></ul><ul><li>May provide medicines and insecticides </li></ul><ul><li>When biodiversity is lost, sometimes it is lost for good. </li></ul>

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