1. 20.1: Species Interactions (Part II)

2. Competition and predation are two
Competition and predation are two important ways in which organisms interact.

3. Competition- occurs when two organisms fight for the same limited resources (2 types)

4. Competition- occurs when two organisms fight for the same limited resources (2 types)
Intraspecific competition - competition between organisms of same species
Example: Zebras fighting for mates

5. Competition- occurs when two organisms fight for the same limited resources (2 types)
Intraspecific competition - competition between organisms of same species
Example: Zebras fighting for mates
Interspecific competition- competition between different species
Example: Different types of barnacles compete for rock space

6. Interspecific competition LEADS TO….
Competitive exclusion- when two species are competing for same resources and one species will be better suited to the niche
Two outcomes:
other species will be pushed into another niche (niche partitioning)
OR become extinct  

7. niche partitioning- dividing of niche by two competing species (e.g. top or tree, or bottom of tree)

8. 2. Predation- process by which one organism captures and feeds upon another organism. 

9. Class Work
Community Interactions Chart and Scenarios