In the equilibrium model of island biogeography, the immigration rate to an island is assumed to depend mainly on
A) distance from sources of migrants.
B) island size.
C) extinction rate.
D) extent of introductions by human colonists.
E) existence or lack of a climax community.

Question

Quizplus · Accepted Answer

The equilibrium model of island biogeography proposes that the number of species on an island is determined by a balance between immigration and extinction rates. The immigration rate is assumed to depend mainly on the distance from sources of migrants, with closer islands receiving more immigrants than those farther away. Island size also plays a role, but the distance from sources of migrants is the primary factor affecting immigration rates.

In the Equilibrium Model of Island Biogeography, the Immigration Rate