Step 1: Definition of Competitive Exclusion Principle.
The Competitive Exclusion Principle states that two species competing for the same resources cannot coexist indefinitely if other ecological factors are constant. One species will eventually outcompete the other, leading to the extinction or migration of the less competitive species.
Step 2: Example.
An example of this principle is the competition between two species of Paramecium (P. aurelia and P. caudatum) in a laboratory environment. When both species were grown together in the same culture, P. aurelia outcompeted P. caudatum and led to its extinction. This demonstrated that two species cannot occupy the same ecological niche without one being displaced.
Step 3: Conclusion.
The Competitive Exclusion Principle highlights the importance of resource partitioning and niche differentiation for species survival in a competitive environment.
