In Accordance with Wilson and MacArthur's Theory of Island Biogeography

question 66

Multiple Choice

In accordance with Wilson and MacArthur's theory of island biogeography, the following equations represent the immigration and extinction rates of species of beetles on a small island. (I = immigration rate of species per month; E = extinction rate of species per month; S = number of species currently on the island.)
I = 9 ? 0.2S
E = 0.3S
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Based on these equations, what is the expected equilibrium species diversity on that island?

• A) 5
• B) 10
• C) 18
• D) 24

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Definitions:

Laspeyres Price Index

a measure of the change in the cost of purchasing a fixed basket of goods and services, relative to the cost of the same basket in a base period.

Demand Function

A mathematical expression showing the relationship between the quantity demanded of a good and its price, along with other determinants like income and prices of related goods.

Substitution Effect

The change in consumption patterns due to a change in the relative prices of goods, leading consumers to substitute one good for another.

Income

The money received by an individual or entity, typically measured over a certain period, for labor, services, or through investments.