Ecologists Measure Population Characteristics Over Several Years in a Metapopulation

question 52

Multiple Choice

Ecologists measure population characteristics over several years in a metapopulation of insects.They find that, in Population A, birth rates exceed death rates.In Populations B and C, death rates exceed birth rates.The sizes of Populations A and C remain relatively stable, whereas Population B declines and eventually goes extinct.How could these three populations best be described?

• A) All three are sink populations.
• B) All three are source populations.
• C) Population A is a source population; Populations B and C are sink populations.
• D) Populations A and B are source populations; Population C is a sink population.
• E) Populations A and C are source populations; Population B is a sink population.

---

Definitions:

Depletion

The accounting process of allocating the cost of natural resources over their productive life, used in industries like mining, timber, and oil extraction.

Estimated Lives

The expected period over which an asset is anticipated to be usable by the company, affecting depreciation and amortization calculations.

Salvage Values

The estimated residual value of an asset at the end of its useful life, determining its value when it can no longer be used for its primary purpose.

Asset Retirement

The process of removing a long-term asset from the company's balance sheet once it is taken out of service, including the associated removal costs.