Competition: occurs when two or more organisms or species require something that is in short supply

What do you think might be in short supply?

What does an organism need?

  1. food
  2. water
  3. shelter
  4. sunlight
  5. partner

Interference competition

Occurs directly between individuals via aggression etc. when the individuals interfere with foraging, survival, reproduction of others, or by directly preventing their physical establishment in a portion of the habitat.

Exploitation competition

Occurs indirectly through a common limiting resourcewhich acts as an intermediate. For example, use of resources depletes the amount available to others, or they compete for space. Also known as exploitative competition.

Apparent competition

Occurs indirectly between two species which are both preyed upon by the same predator. For example, species A and species B are both prey of predator C. The increase of species A may cause the decrease of species B, because the increase of As may aid in the survival of predator Cs, which will increase the number of predator Cs, which in turn will hunt more of species B.

go on to Interdependence

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