Biodiversity
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Biodiversity

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Biodiversity Biodiversity Presentation Transcript

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