Competitive Exclusion & Resource Partitioning — NEET Biology
✅ Asked in NEET 2025Gause's 'Competitive Exclusion Principle' states that two closely related species competing for the same resources cannot co-exist indefinitely and the competitively inferior one will be eliminated eventually. This may be true if resources are limiting, but not otherwise. More recent studies do not support such gross generalisations about competition. While they do not rule out the occurrence of interspecific competition in nature, they point out that species facing competition might evolve mechanisms that promote co-existence rather than exclusion. One such mechanism is 'resource partitioning'. If two species compete for the same resource, they could avoid competition by choosing, for instance, different times for feeding or different foraging patterns. MacArthur showed that five closely related species of warblers living on the same tree were able to avoid competition and co-exist due to behavioural differences in their foraging activities.
NTA tests whether students understand that Gause's Competitive Exclusion Principle states two competing species cannot permanently co-exist, BUT modern evidence shows they CAN co-exist through resource partitioning (different feeding times, foraging patterns). The common trap: students think competition always leads to extinction or forget that species evolve mechanisms to avoid competition. Remember: the principle is NOT absolute—it depends on resource availability and behavioral/ecological adaptations. Study the warbler example: five related species shared one tree because they used different foraging strategies, proving co-existence is possible despite competition.
This paragraph was tested 6 times in NEET.
Gause’s Principle of Competitive Exclusion states that:
Given below are two statements: Statement I: Gause’s ‘Competitive Exclusion Principle’ states that two closely related species competing for the same resources cannot co-exist indefinitely and competitively inferior one will be eliminated eventually. Statement II: In general, carnivores are more adversely affected by competition than herbivores. In the light of the above statements, choose the correct answer from the options given below:
Given below are two statements: (NEET 2023) Statement I: Gause's Competitive Exclusion Principle states that two closely related species competing for the same resources cannot co-exist indefinitely, and the competitively inferior one will be eliminated eventually. Statement II: In general, carnivores are more adversely affected by competition than herbivores. In the light of the above statements, choose the correct answer from the options given below:
In spite of interspecific competition in nature, which mechanism do competing species evolve for survival? (NEET 2021)
Gause's principle of competitive exclusion states that: (NEET 2016 Phase 1)
The principle of competitive exclusion was stated by: (NEET 2016 Phase 2)
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