Niche Competitive Exclusion Principle

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Presentation transcript:

Niche Competitive Exclusion Principle Community Ecology Niche Competitive Exclusion Principle

Community Ecology: Niche

What is a Niche? Every organism has a niche in life. A niche is the role an organism has in an ecosystem. Niche is “what the organism does” Niche includes “where an organism lives”

Other ways to think about it. An organism’s habitat is like its address. An organism’s niche is like its job. Includes what it does. Includes the conditions it lives it.

Two Examples (space, food, interactions, role) The Saguaro Cactus Lion

Distribution of Assassin Bugs in Brazil

Another way to look at it! Two species competing for the same resources cannot coexist. When one species has even the slightest advantage over another, then the one will dominate in the long term. One will overcome the other, leading to the extinction of the other or a shift to a different niche.

Flour Beetles

Two salamander species

Data Analysis Worksheet

Please fill out the exit ticket! Closure Objective: Explain the principle of competitive exclusion Please fill out the exit ticket!

In your own words, explain what the word, niche, means. Bellwork Objective: Explain the principle of competitive exclusion In your own words, explain what the word, niche, means.