Journal ArticleDOI
A Null Model for Competitive Hierarchies in Competition Matrices
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TLDR
A more demanding definition of competitive transitivity ("complete transitivity") is introduced that defines a strict hierarchy of competitive relationships and that has more desirable properties for inferring competitive exclusion.Abstract:
To evaluate the tendency of plant species to be arranged in hierarchies of competitive ability, Keddy and Shipley (1989) introduced a definition of competitive transitivity in multispecies competition matrices and developed an inferential statistic to test for such a pattern. Here, I introduce a more demanding definition of competitive transitivity ("complete transitivity") that defines a strict hierarchy of competitive relationships and that has more desirable properties for inferring competitive exclusion. A null model, and its accompanying Monte Carlo test, is developed that can be used in analyzing empirical competition matrices. Ten published competition matrices are analyzed; nine show clear evidence of complete transitivity. See full-text article at JSTORread more
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Quantifying biodiversity: procedures and pitfalls in the measurement and comparison of species richness
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Beyond pairwise mechanisms of species coexistence in complex communities
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Designs for greenhouse studies of interactions between plants
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Does phylogenetic relatedness influence the strength of competition among vascular plants
TL;DR: It is suggested that Darwin's assertion that competition will be strongest among closely related species is not supported by empirical data, at least for the 142 vascular plant species in this study.