Suppose You Are Studying the Nitrogen Cycling in a Pond

question 32

Multiple Choice

Suppose you are studying the nitrogen cycling in a pond ecosystem over the course of a year. 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 and multiply this number by 100 and add 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 and multiply this number by 100 and subtract 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:

Depreciation Tax Shield

A reduction in taxable income for businesses that allows for the deduction of depreciation expenses.

CCA Class

Refers to the classification system for capital cost allowance used in Canada, which groups assets with similar tax depreciation properties.

Marginal Tax Rate

The rate at which the last dollar of income is taxed, indicating the proportion of additional income that is paid in taxes.

Net Present Value

A financial metric that calculates the difference between the present value of cash inflows and the present value of cash outflows over a period of time.