Question

which of the following ideas helps explain the factors that affect island colonization of and species richness for a region? i. species - area effect ii. rescue effect iii. target effect iv. time/stability hypothesis

Explanation:

The species - area effect (I) shows that larger areas tend to have more species. The rescue effect (II) indicates that immigration from the mainland can rescue a population on an island from extinction. These two factors are key in understanding island colonization and species richness. The target effect (III) and time/stability hypothesis (IV) are not as directly related to the fundamental factors affecting island colonization and species richness as I and II.

Answer:

I and II