In the Study of Oregon Intertidal Communities, Little Brown Barnacles

question 43

Multiple Choice

In the study of Oregon intertidal communities, little brown barnacles (Chthamalus dalii) are first to colonize disturbed areas. Over time, the acorn barnacle (Balanus glandula) dominates the community. Which mechanism of succession explains the relationship between the two species of barnacles?

• A) tolerance
• B) facilitation
• C) inhibition
• D) None of the above

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Definitions:

Market Price

The present cost at which a service or asset is available for purchase or sale on the market.

Marginal Cost

The financial outlay for creating an additional unit of a good or service.

Supply Curve

The supply curve is a graphical representation that shows the relationship between the price of a good and the quantity of the good that producers are willing to supply.

Zero Economic Profit

A situation where a firm's total revenues are exactly equal to its total costs, including opportunity costs, typically occurring in perfect competition in the long run.