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r and K Selection or b and d Selection? | The American Naturalist: Vol 106, No 951

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r and K Selection or b and d Selection?

Eric R. Pianka

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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.

The American Naturalist, volume 106 issue 951 cover

The American Naturalist

Volume 106, Number 951Sep. - Oct., 1972

Published for The American Society of Naturalists

Article DOI

https://doi.org/10.1086/282798

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