Science Unit Test Chapter 3 Glossary Terms

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  1. Biodiversity:
    The number and variety of organisms found within a specific area
  2. Protect:
    • To legally guard from harm (i.e. hunting, poaching), am endangered, threatened or a species of concern
    • i.e. ban all fishing in a lake with a dwindling fish population
  3. Biodiversity Hotspot:
    • An relatively small area where the number of species present is exceptionally large
    • i.e. The island of Madagascar has many species found nowhere else on the planet
  4. Community:
    All the populations of different species that interact within their specific ecosystem or area
  5. Dominant Species:
    • The species with the most amount of biomass in their ecosystem
    • i.e. grass
  6. Keystone Species:
    • A species that can greatly affect the population numbers and health of an ecosystem
    • i.e. The wolves of Yellowstone Park
  7. Captive Breeding:
    The breeding of rare or endangered species in captivity to boost population numbers
  8. Ecosystem Engineer:
    • A species that can changes an ecosystem or a piece of land so drastically that it creates a new ecosystem all together
    • i.e. Beavers build a dam that provide shelter for species, but also change the amount of trees and the flow of the river
  9. Succession:
    The series of changes over time in an ecosystem following a disturbance
  10. Habitat Loss:
    • The destruction of habitats, usually as a result of human activities
    • i.e. Clear cutting a forest for farm land, leaving all the organisms without shelter or food
  11. Deforestation:
    The removal of forest from land, resulting in the loss of habitat. Caused by human activities, like logging. It becomes severe if the forests are never replanted
  12. Alien Species:
    • A species accidentally or deliberately introduced to an area that it is not native to. Usually due to human actions.
    • i.e. Jellyfish travelling in ship ballast tanks, escaping to other bodies of water
  13. Invasive Species:
    • A species that can take over the habitat of native species or invade their bodies
    • i.e. The Asian carp is dominating American rivers, having all the other fish species go down in population
  14. Overexploitation:
    The use or extraction of a resource until it is depleted
  15. Extinction:
    The death of all the members of a species
  16. Biodiversity Crisis:
    • The current accelerated rate of extinctions on Earth
    • Image Upload 1
  17. Restoration Ecology:
    • The renewal of destroyed ecosystems through active human intervention
    • i.e. Returning a deforested area to its former forested appearance
  18. Reforestation:
    The act of planting seeds or trees in deforested areas with the hope of restoring the ecosystem
  19. Biocontrol:
    • The use of a species to control the population or spread of an undesirable species
    • i.e. The use of weevils to destroy a weed population that prevents fishing on Lake Victoria
  20. Bioremediation:
    • The use of living organisms to clean up contaminated areas naturally
    • i.e. The use of bacteria to clean oil spills
  21. Bioaugmentation:
    The use of organisms to add essential chemical nutrients to depleted soils to restore the ecosystem
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Science Unit Test Chapter 3 Glossary Terms
Ecology Unit Test Cards
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