Biodiversity

AP Biology· difficulty 4/5

MacArthur and Wilson's equilibrium theory of island biogeography.

The intersection point S* represents:

A
$The number of endemic species$
B
$The maximum species ever possible$
C
$The equilibrium species richness where immigration = extinction$
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D
$Species saturation by competition only$

Explanation

Island species richness equilibrates where the immigration rate equals the extinction rate, even though species turnover continues.

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