Document Type

Article

Publication Date

9-1-2003

Keywords

Competitive coexistence, Competitive exclusion, Flour beetle, Thomas Park

Abstract

1. In this journal 35 years ago, P. H. Leslie, T. Park and D. B. Mertz reported competitive exclusion data for two Tribolium species. It is less well-known that they also reported 'difficult to interpret' coexistence data. We suggest that the species exclusion and the species coexistence are consequences of a stable coexistence two-cycle in the presence of two stable competitive exclusion equilibria. 2. A stage-structured insect population model for two interacting species forecasts that as interspecific interaction is increased there occurs a sequence of dynamic changes (bifurcations) in which the classic Lotka-Volterra-type scenario with two stable competitive exclusion equilibria is altered abruptly to a novel scenario with three locally stable entities; namely, two competitive exclusion equilibria and a stable coexistence cycle. This scenario is novel in that it predicts the competitive coexistence of two nearly identical species on a single limiting resource and does so under circumstances of increased interspecific competition. This prediction is in contradiction to classical tenets of competition theory.

Journal Title

Journal of Animal Ecology

Volume

72

Issue

5

First Page

703

Last Page

712

DOI

https://doi.org/10.1046/j.1365-2656.2003.00743.x

First Department

Mathematics

Acknowledgements

Free article retrieved March 22, 2021 from https://besjournals.onlinelibrary.wiley.com/doi/epdf/10.1046/j.1365-2656.2003.00743.x

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