What Is a Critical Load

question 15

Multiple Choice

What is a critical load?

• A) the amount of nutrient augmentation necessary to bring a depleted habitat back to its former level
• B) the level of a given toxin in an ecosystem that is lethal to 50% of the species present
• C) the maximum abundance level of a particular species, beyond which additional numbers will degrade a habitat
• D) the amount of added nutrient that can be absorbed by plants without damaging ecosystem integrity
• E) the number of predators an ecosystem can support that effectively culls prey populations to healthy levels

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Definitions:

Variable Costs

Costs that change in proportion to the level of goods or services produced by a business.

Net Income

The total profit of a company after all expenses, including taxes and operating costs, have been subtracted from total revenues.

Variable Production Cost

Costs that fluctuate with the production volume, including variable manufacturing overhead, direct materials, and direct labor.

Fixed Production Cost

Costs that do not vary with the level of output, such as salaries, rent, and depreciation of production facilities.