Community Ecology

AP Biology· difficulty 3/5

The realized niche is smaller than the fundamental niche primarily because of:

A
$Mutation rates$
B
$Random genetic drift$
C
$Speciation events$
D
$Biotic interactions such as competition and predation restrict realized use$
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Explanation

The fundamental niche reflects abiotic tolerances; competitors, predators, and disease typically reduce the actually occupied space to a smaller realized niche.

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