Science Chapter 3

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  1. Biodiversity
    • The number and variety of organisms found in an specific region
    • e.g. About 5000 species of plants have been identified in Canada.
  2. Protect
    • To protect or guard a species that is endangered or threatened.  
    • e.g. black rhino
  3. Biodiversity Hotspot
    • Where there is an exceptionally large number of living species in a small area
    • e.g. Carolinian Canada in southwestern Ontario
  4. Community
    All populations of different species that interact in a specific area or ecosystem.
  5. Dominant Species
    • Species that have the biggest biomass of any community member
    • In terrestrial ecosystems primary producers are always the dominant species
    • Removing dominant species results in a decrease in biodiversity
  6. Keystone Species
    • A species that greatly affects population numbers, and health of an ecosystem.
    • Generally not abundant
    • E.g. Sea otters, prairie dogs
  7. Captive Breeding
    • The breeding of rare or endangered species, in a controlled setting, to increase population size.
    • E.g. ferrets
  8. Ecosystem Engineers
    • Species that cause such dramatic changes to landscapes that they create a new ecosystem
    • E.g. Beavers
  9. Succession
    Series of changes in an ecosystem that occurs over time, following a disturbance
  10. Habitat Loss
    When an ecosystems alter so much by natural disasters or human activities, that some species can no longer survive there
  11. Deforestation
    Occurs when forests are cleared out for human use., and never replanted
  12. Alien Species
    • Species that are introduced to new parts of the biosphere from other regions
    • May be released on purpose or accidentally
    • Anything that is not native
  13. Invasive Species
    • Invasive species that take over the habitat of native species.
    • e.g. zebra mussels
  14. Over-exploitation
    • Use or extracting a resource until its depleted
    • e.g. over fishing of Atlantic cod
  15. Extinction
    • Death of all individuals of a species
    • e.g. saber tooth tiger
  16. Biodiversity Crisis
    The current accelerated rate of extinction on earth
  17. Restoration Ecology
    The renewal of degraded or destroyed ecosystems through active human intervention
  18. Reforestation
    Regrowth of a previously cut down forest, through natural process or through planting of seeds
  19. Biocontrol
    • Use of a species to control population growth or spread of an undesirable species
    • e.g. Use of an European fly to control forest pests
  20. Bioremediation
    • The use of living organisms to clean up contaminated areas naturally
    • e.g. Use of plants to absorb heavy metals from toxic soil
  21. Bioaugmentation
    • The use of living organisms to add essential nutrients to depleted soils
    • e.g. Use of clover to add nitrogen to depleted soils
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Science Chapter 3
2014-10-01 22:11:50

Science Glossary Terms
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