Interspecific Competition

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Interspecific Competition
- Competition between individuals of different
species.
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Interspecific Competition and the Niche
Fundamental niche - the range of resources and
conditions where a species has positive fitness
in the absence of interactions with other
species. Realized niche - The subset of the
fundamental niche used by a species in the
presence of species interactions such as
competition.
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Competitive Exclusion Principle - Two species
with identical niches cannot coexist, one will
drive the other to extinction.
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Character displacement - genetically-determined
changes in the niche of a species resulting from
interspecific competition.
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