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Population – group of individuals of the same species living in the same area, potentially interacting Community – group of populations of different species.

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Presentation on theme: "Population – group of individuals of the same species living in the same area, potentially interacting Community – group of populations of different species."— Presentation transcript:

1 Population – group of individuals of the same species living in the same area, potentially interacting Community – group of populations of different species living in the same area, potentially interacting What are some ecological interactions?

2 Why are ecological interactions important? Interactions can affect distribution and abundance. Interactions can influence evolution. Think about how the following interactions can affect distribution, abundance, and evolution.

3 Types of ecological interactions competition predation parasitism mutualism commensalism symbiosis

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5 Competition – two species share a requirement for a limited resource  reduces fitness of one or both species

6 Predation – one species feeds on another  enhances fitness of predator but reduces fitness of prey herbivory is a form of predation

7 Parasitism – one species feeds on another  enhances fitness of parasite but reduces fitness of host

8 Mutualism – two species provide resources or services to each other  enhances fitness of both species

9 Commensalism – one species receives a benefit from another species  enhances fitness of one species; no effect on fitness of the other species

10 Symbiosis – two species live together  can include parasitism, mutualism, and commensalism

11 Organizing ecological interactions effect on species 1 effect on species 2 + 0 - +0-+0- mutualism predation herbivory parasitism predation herbivory parasitism commensalism competition


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