chapter 3

  1. Biodiversity
    the number and variety of life forms, including species, found within a specific region as well as the number and variety of ecosystems within and beyond that region
  2. Protect
    To guard legally from harm a species that is listed as endangered, threatened, or of special concern
  3. Biodiversity Hotspot
    a place where there is an exceptionally large number of species in a relatively small area
  4. Community
    all the populations of the different species that interact in a specific area or ecosystem
  5. Dominant Species
    Species that are so abundant that they have the biggest biomass of any community member
  6. Keystone Species
    a species that can greatly affect population numbers and the health of an ecosystem

    E.g. Sea Otters
  7. Captive Breeding
    the breeding of rare or endangered wildlife in controlled settings to increase population size

    E.g. Black Footed Ferrets in Toronto zoo
  8. Ecosystem Engineer
    • a species that causes such dramatic changes to landscape that it creates a new ecosystem
    • E.g. beaver
  9. Succession
    the series of changes in an ecosystem that occurs over time, following a disturbance
  10. habitat loss
    the destruction of habitats, which usually results from human activities. Natural sources of habitat destruction include:volcanic eruptions and droughts
  11. deforestation
    the practice of clearing forests for logging or other human uses, and never replanting them
  12. Alien Species
    a species that is accidentally or deliberately introduced into a new location
  13. invasive species
    a species that can take over the habitat of native species
  14. overexploitation
    the use or extraction of a resource until it is depleted
  15. extinction
    • the death of all the individuals of a species
    • E.g. dinosaurs
  16. biodiversity crisis
    the current accelerated rate of exinctions
  17. restoration ecology
    the renewal of degraded or destroyed ecosystems through active human intervention
  18. reforestation
    the 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
    • E.g. gypsy moth introduced to control populations of European flies
  20. bioremediation
    • the use of living organisms to clean up contaminated areas naturally
    • E.g. bacteria breakdown oil from oil spill
  21. bioaugmentation
    • the use of organisms to add essential nutrients to depleted soils
    • E.g. clover replenishes nitrogen in soil
Card Set
chapter 3
science glossary terms