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18.3 Types of Interactions

18.3 Types of Interactions. Limiting Factors & Carrying Capacity. Limiting Factor – something that limits the size of a population Ex: Food, Water, Space Carrying Capacity – the largest population that an environment can support. Limiting factors influence the carrying capacity. Competition.

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18.3 Types of Interactions

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  1. 18.3 Types of Interactions

  2. Limiting Factors & Carrying Capacity • Limiting Factor – something that limits the size of a population • Ex: Food, Water, Space • Carrying Capacity – the largest population that an environment can support. • Limiting factors influence the carrying capacity.

  3. Competition • Competition occurs when two organisms try to use the same resources. • Can be within a population or a community

  4. Predation • Prey – organism that is killed & eaten by another • Predator – organism that kills another for food. • Predators have adaptations that help them capture their prey (i.e. speed, sharp teeth, claws). • Prey also have adaptations to protect themselves (i.e. camouflage, poison).

  5. Symbiosis • Symbiosis is the long term association or relationship between organisms that benefits at least 1 organism. • 3 Types: Mutualism, Commensalism, Parasitism

  6. Mutualism • Symbiotic relationship in which both organisms benefit.   • Example:

  7. Commensalism • Symbiotic relationship in which one organism benefits and the other is unaffected.  • Example:

  8. Parasitism • Symbiotic relationship in which one organism benefits and the other is harmed.   • Example:

  9. Video Time

  10. Comprehension Check • How do limiting factors affect the carrying capacity? • How are the three types of symbiosis different? • How are predation and parasitism different?

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