Chapter 3-Biodiversity

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Author:
sadiakhan
ID:
308431
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Chapter 3-Biodiversity
Updated:
2015-09-29 19:19:22
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grade9science
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This is part of the grade 9 Ecology unit.
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  1. Biodiversity
    Biodiversity is the variety of different types of life found on earth. It can also be a measure of the variety of organisms present in different ecosystems.
  2. Protect
    To guard legally from harm a species that is listed as endangered, threatened, or of special concern.
  3. Biodiversity hotspot
    A biodiversity hotspot is a geographic region with a significant reservoir of biodiversity. Place where there is an exceptionally large number of species in a relatively small area. Examples: Carolinian Canada (deciduous forests) & Leitrim Wetlands in Ontario, Lake Malawi in East Africa.
  4. Community
    An interacting group of all the populations of various species in a common location or ecosystem.
  5. Dominant species
    Species that are so abundant that they have the largest biomass of any community member. Examples: American chestnut tree
  6. Keystone species
    A species that can greatly affect population numbers and the health of an ecosystem. Examples: sea otters
  7. Captive breeding
    Captive breeding is the process of breeding animals outside of their natural environment in restricted conditions in farms, zoos or other closed facilities. The choice of individual animals that are to be part of a captive breeding population, and the mating partners within that population, are controlled by humans. Captive breeding is used to increase the population size of rare or endangered wildlife. Example: Toronto Zoo's black-footed ferret captive breeding program.
  8. Ecosystem Engineer
    An ecosystem engineer is an organism that modifies, creates or destroys habitat. It directly or indirectly affects the availability of resources to other species causing physical state changes in biotic or abiotic materials. Such organisms can create dramatic changes in landscapes to the point that a new ecosystem is created. Example: beavers building dams.
  9. Succession
    the gradual process by which ecosystems change and develop over time as a result of various disturbances.

  10. Habitat Loss
    the process in which natural habitat is destroyed and rendered unable to support the species present. In this process, the organisms that previously used the site are displaced or destroyed, reducing biodiversity.
  11. Deforestation
    The clearing of trees, transforming a forest into cleared land.
  12. Alien species
    An introduced species living outside its native distributional range, which has arrived there by human activity, either deliberate or accidental.
  13. Invasive species
    A species that can take over the habitat of native species
  14. Overexploitation
    the use or extraction of resource until it is depleted.
  15. Extinction
    The end of a species. The moment of extinction is generally considered to be the death of the last individual of the species. When all the individuals of a species die.
  16. Biodiversity Crisis
    The current accelerated rate of extinctions.
  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 control of a pest's population or distribution by the introduction of a natural enemy or predator.
  20. Bioremediation
    the use of either naturally occurring or deliberately introduced microorganisms or other forms of life to consume and break down environmental pollutants, in order to clean up a polluted site.
  21. Bioaugmentation
    the addition of bacteria, nutrients, and other growth factors to add essential nutrients to depleted soils.

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