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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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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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