What term describes the maximum population size that resources can support?

What term describes the maximum population size that resources can support?

• A. Growth rate
• B. Biotic potential
• C. Carrying capacity
• D. Population density

Answer: (C)

Carrying capacity is the maximum population size that resources can sustain over the long term. In any environment, limited food, water, space, and other resources prevent a population from growing forever. When a population approaches this limit, resources become scarce, slowing birth rates or increasing death rates until the numbers level off around that carrying capacity. If the population is well below this limit, it can grow; if it goes above it, declining resources push the population back down. Growth rate describes how fast a population changes over time, not the upper limit. Biotic potential is the maximum growth possible under ideal conditions, ignoring limiting factors, which isn’t the real-world ceiling. Population density is simply the number of individuals per area, a measure of how crowded it is, not the sustainable limit.

Carrying capacity is the maximum population size that resources can sustain over the long term. In any environment, limited food, water, space, and other resources prevent a population from growing forever. When a population approaches this limit, resources become scarce, slowing birth rates or increasing death rates until the numbers level off around that carrying capacity. If the population is well below this limit, it can grow; if it goes above it, declining resources push the population back down.

Growth rate describes how fast a population changes over time, not the upper limit. Biotic potential is the maximum growth possible under ideal conditions, ignoring limiting factors, which isn’t the real-world ceiling. Population density is simply the number of individuals per area, a measure of how crowded it is, not the sustainable limit.