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Park's Tribolium competition experiments: a non‐equilibrium species coexistence hypothesis
Author(s) -
Edmunds Jeffrey,
Cushing J. M.,
Costantino R. F.,
Henson Shandelle M.,
Dennis Brian,
Desharnais R. A.
Publication year - 2003
Publication title -
journal of animal ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.134
H-Index - 157
eISSN - 1365-2656
pISSN - 0021-8790
DOI - 10.1046/j.1365-2656.2003.00743.x
Subject(s) - interspecific competition , competitive exclusion , competition (biology) , coexistence theory , biology , limiting , storage effect , ecology , population , stability (learning theory) , demography , computer science , mechanical engineering , sociology , engineering , machine learning
Summary1 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.