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Understanding Ecological Interactions: Predation, Parasitism, Mutualism, and Commensalism

Explore the various ecological interactions within ecosystems, including predation, where one organism captures another for survival. Delve into parasitism, exemplified by the tomato hornworm and braconid wasps, where the parasite benefits at the host's expense. Learn about mutualism, where interactions benefit both species, such as in pollination and seed dispersal. Lastly, discover commensalism, where one species gains while the other remains unaffected, illustrated by barnacles on bird nests. Each relationship showcases life's interconnected web.

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Understanding Ecological Interactions: Predation, Parasitism, Mutualism, and Commensalism

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Presentation Transcript

  1. Interactions

  2. Predation • The capturing of prey as a means of maintaining life • One organism benefits • One organism is killed

  3. 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

  4. 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

  5. Lampreys are Parasites

  6. Mutualism • Mutualism is any relationship between two species of organisms that benefits both species.

  7. Examples of Mutualism • Pollination • Seed Dispersal • Lichens

  8. Commensalism • Relationship between two species where one species benefits from the relationship and the second species is unaffected

  9. Examples of Commensalism • Barnacles and Bird Nests

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