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r and K Selection or b and d Selection?

Eric R. Pianka
The American Naturalist
Vol. 106, No. 951 (Sep. - Oct., 1972), pp. 581-588
Stable URL: http://www.jstor.org/stable/2459721
Page Count: 8
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
r and K Selection or b and d Selection?
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Abstract

The concepts of r and K selection and b and d selection are discussed and compared. The former pair of concepts will play a central role in the development of new theories in population biology which relax the assumptions that communities (and portions thereof) are either fully saturated or completely unsaturated. It is hypothesized that maximal tolerable niche overlap should vary inversely with the level of competition, and a test is suggested.

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