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Ecology, Concepts and Applications, 2/e
Manuel C. Molles, University of New Mexico - Albuquerque

Population Growth

Chapter Objectives


In the presence of abundant resources, populations can grow at geometric or exponential rates.

As resources are depleted, population growth rate slows and eventually stops; this is known as logistic population growth.

The environment limits population growth by changing birthrates and death rates.

On average, small organisms have higher rates of per capita increase, r, and more variable populations, while large organisms have lower rates of per capita increase and less variable populations.