Ecological interactions
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Ecological Interactions. Interacting with the Environment. LIMITING FACTORS. An environment only contains a certain amount of food, water, shelter and other resources. When one of those resources becomes scarce it is called a LIMITING FACTOR.

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Ecological Interactions

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Ecological interactions

Ecological Interactions


Interacting with the environment

Interacting with the Environment

LIMITING FACTORS

  • An environment only contains a certain amount of food, water, shelter and other resources.

  • When one of those resources becomes scarce it is called a LIMITING FACTOR.

  • This means that a population’s size can become limited by that factor.


Interacting with the environment1

Interacting with the Environment

CARRYING CAPACITY

  • When limiting factors become scarce populations become smaller.

  • This means that an environment has reached carrying capacity.

  • CARRYING CAPACITY is the maximum number of organisms that an environment can support.


Interactions between organisms

Interactions Between Organisms

COMPETITION

  • Competition happens between populations.

  • Competition also happens within populations.


Interactions between organisms1

Interactions Between Organisms

Predator/Prey Interactions

  • Predators have adaptations that make them efficient hunters.

    • Ex: Speed, stealth, coloration

  • Prey have adaptations that help them escape from predators.

    • Ex: Traveling in packs, warning coloration, mimicry, chemicals


  • Interactions between organisms2

    Interactions Between Organisms

    SYMBIOSIS

    • Mutualism – Both organisms benefit.

    • Commensalism – One organism benefits the other is unaffected.

    • Parasitism – One organism benefits and the other is harmed.


    Interactions between organisms3

    Interactions Between Organisms

    Coevolution

    • When a long-term change takes place in two species because of their close interactions with one another, the change is called COEVOLUTION.


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