interdependence and adaptation


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  • Created by: mathu
  • Created on: 11-06-12 19:51


  • plants compete for: light, space + water and nutrients from soil
  • animals compete for: mates, food and territory
  • organisms have adaptations which enable them to survive in the conditions in which they already live
  • extremophiles: organisms which live in extreme environments, may be tolerant to high levels of salt, high temperatures or high pressures

Animals may survive in the arctic due to

  • thickness of insulating coat
  • amount of body fat
  • camoflague
  • changes to surface area

Animals may survive in dry conditions due to

  • changes to surface area
  • extensive root systems - absorb water quickly over large area
  • deep roots - access underground water
  • water storage tissues
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environmental change

  • changes in the environment affects the distribution of living organisms
  • animals and plants are subjected to environmental changes
  • such changes may be caused by living (change in competitor) or non-living factors (change in rainfall or temperature)
  • living organisms can be used as indicators of pollution:
    - lichen can be used as air pollution indicators, particularly the concentration of sulfur dioxide in the atmosphere
    - invertebrate animals can be used as water pollution indicators of the concentration of dissolved oxygen in water
  • environmental changes can be measured using non-living indicators such as oxygen levels, temperature and rainfall
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