chapter 3 terms

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chapter 3 terms
2012-10-01 19:22:00
glossary terms chapter

glossary terms chapter 3 science textbook
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  1. Biodiversity
  2. Protect
  3. Biodiversity Hotspot
  4. Community
  5. Dominant Species
  6. Keystone Species
  7. Captive Breeding
  8. Ecosystem Engineer
  9. Succession
  10. Habitat Loss
    • Habitat loss occurs when events, ddue to natural disasters or human activities, alter a terrestrial or aquatic ecosystemso much that many species can no longer survive there
    • ex. can be caused by deforestation, draining wetlands
  11. Deforestation
    Deforestation occurs when forests are logged or cleared for human use, and are never replanted
  12. Alien Species
    • A species that is accidentally or diliberately introduced into a new location.
    • ex. zebra mussels- introduced to great lakes through ballast water from Asia
  13. Invasive Species
    • A species that can take over the habitat of native species.
    • -alien species are invasive species
    • -ex. zebra mussels 
  14. Overexploitation
    • Use or extraction of a resource until it is depleted
    • -eg. overfishing of atlantic cod, overhunting of passenger pigeons
  15. Extinction
    • the death of all the individuals of a species
    • eg. Dodo bird, passenger pigions etc.
    • -may happen naturally through background extinction, caused by slow changes in ecosystems that affect species, or through mass extinction which occurs more quickly
    • -may be caused by human activities such as overexploitation
  16. Biodiversity Crisis
  17. Restoration Ecology
    • The renewal of degraded or destroyed ecosystems through active human interactions.
    • Restoration methods
    • -reforestation
    • - wetlands restoration
    • -controlling alien species
    • -chemical control
    • -bioremediation
    • -bioaugmentation
  18. Reforestation
     Regrowth of a forest, either through natural processes or through the planting of seeds or trees in an area where a forest was cut down
  19. Biocontrol
    • The use of a species to control the population growth or spread of an undesirable species
    • eg. use of a european fly to control the gypsy moth
    • eg. use of bacteria spraying to control tent caterpillars and other forest pests
  20. Bioremediation
    • the use of living organisms to clean up contaminated areas naturally
    • eg. use of plants to absorb heavy metals from toxic soil
    • eg. use of bacteria to clean up oil spills on the coast
  21. Bioaugmentation
    • The use of living organisms to add essential nutrients to depleted soils
    • eg. use of clover to add nitrogen to depleted soils