Ecosystems 3

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Author:
bijaldesai
ID:
174299
Filename:
Ecosystems 3
Updated:
2012-10-05 15:22:14
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Description:
chapter 3
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  1.  captive breeding
    the breeding of rare or endangered wildlife in controlled settings to increase the poulation size
  2. restoration ecology
    the renewal of degraded or destroyed ecosystems through acticve human intervention
  3. bioaugmentation
    • the use of organisms to add essential nutrients to depleted soils
    • eg. clovers are planted to replenish nitrogen levels in soil
  4. succession
    • the series of changes in an ecosystem that occurs over time, following a disturbance
    • usually benefits many species
  5. invasive species
    • a species that can take over the habitat of native species or invade their bodies
    • e.g. zebra mussels
    • they can outcompete native mussels for resouces, have no natural predators,  and can grow exponentially
  6. alien species
    • a species that is accidentally or deliberately introduced to a new location
    • e.g. round gobies
  7. bioremediation
    • the use of living organisms to clean up contaminated areas naturally
    • -certain plants are grown in certain areas to clean the soil by collecting the poisins
  8. overexploitation
    the use or extraction of a resource until it is depleted.
  9. biodiversity hotspot
    • a place where there is an exceptionally large number of species in a relatively small area
    • e.g. Carolinian Canada and Leitrim Wetlands
  10. keystone species
    • a species that can greatly affect population numbers and the health of an ecosystem
    • e.g. sea otters
  11. Biodiversity
    the number and variety of organisms found in a specific region as well as all the number and variety of ecosystems within and beyond that region
  12. protect
    To legally guard from harm a species that is listed as endangered,threatened or of special concern.
  13. biodiversity crisis
    the current accelerated rate of extinctinons
  14. extinction
    the death of all the individuals of a species
  15. ecosystem engineer
    • a species that causes such dramatic changes to landscapes that it creates a new ecosystem
    • e.g. The beetles in the desert of Mexico
  16. biocontrol
    the use of a species to control the population growth or spread of an undesirable species
  17. deforestation
    the practice of clearing forest for logging or other human uses, and never replanting them
  18. habitat loss
    the destruction of habitats which usually results from human activities, or perhaps natural disasters
  19. dominant species
    • a species that is so abundant that it has the biggest biomass of any community member
    • e.g. American Chestnut
  20. reforestation
    the regrowth of a forest, either through the planting of seeds or trees in an area where a forest was cut down
  21. community
    all the populations of the different species that interact in a specific area or ecosystem

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