Define carrying capacity and explain how limiting factors determine it for a population.

Define carrying capacity and explain how limiting factors determine it for a population.

• A. Carrying capacity is the maximum population size the environment can sustain indefinitely; limiting factors (food, water, shelter, predators, disease) cap growth.
• B. Carrying capacity is the total number of species in an ecosystem.
• C. Carrying capacity is the maximum number of individuals that can be born per year.
• D. Carrying capacity is the average lifespan of individuals.

Answer: (A)

Carrying capacity is the maximum population size an environment can sustain indefinitely given the available resources and conditions. Limiting factors such as food, water, shelter, predators, and disease constrain growth because as the population increases, demand on these resources rises. When resources become scarce or hazards increase, birth rates can drop and death rates can rise, causing the population to level off or even decline. Because environments can change, carrying capacity isn’t a fixed number—it can rise if resources improve or fall if conditions worsen. In short, the limiting factors set the ceiling for how large a population can be while the environment can continue to support it.

Carrying capacity is the maximum population size an environment can sustain indefinitely given the available resources and conditions. Limiting factors such as food, water, shelter, predators, and disease constrain growth because as the population increases, demand on these resources rises. When resources become scarce or hazards increase, birth rates can drop and death rates can rise, causing the population to level off or even decline. Because environments can change, carrying capacity isn’t a fixed number—it can rise if resources improve or fall if conditions worsen. In short, the limiting factors set the ceiling for how large a population can be while the environment can continue to support it.