Suppose You Are Studying the Nitrogen Cycling in a Pond

question 2

Multiple Choice

Suppose you are studying the nitrogen cycling in a pond ecosystem over the course of a month. While you are collecting data, a flock of 100 Canada geese lands and spends the night during a fall migration. What could you do to eliminate error in your study as a result of this event?

• A) Find out how much nitrogen is consumed in plant material by a Canada goose over about a 12-hour period, multiply this number by 100, and add that amount to the total nitrogen in the ecosystem.
• B) Find out how much nitrogen is eliminated by a Canada goose over about a 12-hour period, multiply this number by 100, and subtract that amount from the total nitrogen in the ecosystem.
• C) Find out how much nitrogen is consumed and eliminated by a Canada goose over about a 12-hour period and multiply this number by 100; enter this +/- value into the nitrogen budget of the ecosystem.
• D) Do nothing. The Canada geese visitation to the lake would have negligible impact on the nitrogen budget of the pond.
• E) Put a net over the pond so that no more migrating flocks can land on the pond and alter the nitrogen balance of the pond.

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Definitions:

Profit per Unit

Is the difference between the selling price of a product and the cost to produce it, expressed on a per-unit basis.

Perfect Competition

Perfect competition describes a market structure where numerous small firms compete against each other, and goods are homogeneous, leading to no single firm having market power and prices being determined purely by supply and demand.

Economic Profits

The excess of total revenues over total costs, including both explicit and implicit costs.

Perfect Competition

An ideal market structure characterized by infinite buyers and sellers, identical products, and no barriers to entry or exit.