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Interactions - PowerPoint PPT Presentation


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Interactions. Predation. The capturing of prey as a means of maintaining life One organism benefits One organism is killed. Parasitism. A tomato hornworm is covered with cocoons of pupating braconid wasps . One organism (the parasite) benefits

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predation
Predation
  • The capturing of prey as a means of maintaining life
    • One organism benefits
    • One organism is killed
parasitism
Parasitism

A tomato hornworm is covered with cocoons of pupating braconid wasps

One organism (the parasite) benefits

and the other (the host) is harmed, but is still alive

parasitism1
Parasitism
  • Can be considered a special case of predation
  • Because the parasite needs the host to remain alive, it is typically advantageous for the parasite NOT to kill its host
mutualism
Mutualism
  • Mutualism is any relationship between two species of organisms that benefits both species.
examples of mutualism
Examples of Mutualism
  • Pollination
  • Seed Dispersal
  • Lichens
commensalism
Commensalism
  • Relationship between two species where one species benefits from the relationship and the second species is unaffected
examples of commensalism
Examples of Commensalism
  • Barnacles and Bird Nests