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Friday, 10 September 2010

Competition -A2

Interspecific- When competition arises between two different species.
Intraspecific- When competition arises between the same species.

Plants compete for: Light, water, nutrients, growth space.

Interspecific Competition:
  • Where two populations initially occupy the same niche, one will normally have a competitive advantage over the other.
  • The population of this species will gradually INCREASE in size while the other will decrease. This is known as the 'comeptitve exclusion' principle.

'Competitive Advantage' is a better term to use then 'Dominant'. Avoid dominant.

Niche + Competition ->

  • Do they feed in different areas/levels? (E.g. feed in water, whereas other feeds from shrubs. Or Feeding on the sea bed, as opposed to the water surface.)
  • Where do they nest/settle? (Trees, bushes, ponds, underwater, underground.)

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