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

Chapter Objectives


The physical environment limits the geographic distribution of species.

On small scales, individuals within populations are distributed in patterns that may be random, regular, or clumped; on larger scales, individuals within a population are clumped.

Population density declines with increasing organism size.

Rarity is influenced by geographic range, habitat tolerance, and population size; rare species are vulnerable to extinction.








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