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ECOLOGY INTERACTIONS. Types of ecological interactions competition predation parasitism mutualism commensalism symbiosis.

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Presentation on theme: "ECOLOGY INTERACTIONS. Types of ecological interactions competition predation parasitism mutualism commensalism symbiosis."— Presentation transcript:

1 ECOLOGY INTERACTIONS

2 Types of ecological interactions competition predation parasitism mutualism commensalism symbiosis

3

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

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

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

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

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

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

10 Organizing ecological interactions effect on species 1 effect on species mutualism predation herbivory parasitism predation herbivory parasitism commensalism competition

11 VIDEO Elements of Biology: Ecosystems: Organisms and Their Environment strategies/video-segments/1496/ strategies/video-segments/1496/ Assignment: Ecological Interactions Quiz

12 13.2 RESEARCH QUESTIONS 1)Name two ways in which members of the same species interact. 2)In what ways do members of different species interact? 3)Think of a biological community near you, and give an example of how population has affected another. 4)Explain how symbiotic relationships are similar to and different from predator-prey interactions.


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