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The Assembly of Species Communities: Chance or Competition?

Edward F. Connor and Daniel Simberloff
Ecology
Vol. 60, No. 6 (Dec., 1979), pp. 1132-1140
Published by: Wiley
DOI: 10.2307/1936961
Stable URL: http://www.jstor.org/stable/1936961
Page Count: 9
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The Assembly of Species Communities: Chance or Competition?
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Abstract

We challenge Diamond's (1975) idea that island species distributions are determined predominantly by competitions canonized by his @'assembly rules.@' We show that every assembly rule is either tautological, trivial, or a pattern expected were species distributed at random. In order to demonstrate that competition is responsible for the joint distributions of species, one would have to falsify a null hypothesis stating that the distributions are generated by the species randomly and individually colonizing an archipelago.

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