20.1: Species Interactions (Part II)
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Transcript of 20.1: Species Interactions (Part II)
20.1: SPECIES INTERACTIONS(PART II)
• Competition and predation are two important ways in which organisms interact.
1. Competition- occurs when two organisms fight for the same limited resources (2 types)
1. 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
Competition- occurs when two organisms fight for the same limited resources (2 types)• Intraspecific competition -
competition between organisms of same specieso Example: Zebras fighting for
mates• Interspecific competition-
competition between different specieso Example: Different types of
barnacles compete for rock space
Interspecific competition LEADS TO….
i. Competitive exclusion- when two species are competing for same resources and one species will be better suited to the niche
• Two outcomes:1. other species will be
pushed into another niche (niche partitioning)
2. OR become extinct
• niche partitioning- dividing of niche by two competing species (e.g. top or tree, or bottom of tree)
2. Predation- process by which one organism captures and feeds upon another organism.
CLASS WORKCommunity Interactions Chart and Scenarios