![](/olcweb/styles/shared/spacer.gif) | ![](/sites/dl/free/007029416x/title/MOLLES2E02SP_sm.jpg) 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. |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | 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. |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Population density declines with increasing organism size. |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | Rarity is influenced by geographic range, habitat tolerance, and population size; rare species are vulnerable to extinction. |
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