Park's Tribolium competition experiments: a non-equilibrium species coexistence hypothesis
Park's Tribolium competition experiments: a non-equilibrium species coexistence hypothesis
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帕克的Tribolium竞争实验：非平衡物种共存假说
DOI：
10.1046/j.1365-2656.2003.00743.x
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发表时间：
2003
影响因子：
4.8
通讯作者：
R. Desharnais
中科院分区：
文献类型：
--
作者：
J. Edmunds;J. Cushing;R. Costantino;S. Henson;B. Dennis;R. Desharnais
摘要1. 35年前，在这本日记里，Leslie，T. Park和D. B。Mertz报道了两种拟谷盗属物种的竞争排除数据。不太为人所知的是，他们还报告了“难以解释”的共存数据。我们认为，物种排斥和物种共存是一个稳定的共存双循环存在两个稳定的竞争排斥平衡的后果。2.两个相互作用物种的阶段结构昆虫种群模型预测，随着种间相互作用的增加，会发生一系列动态变化（分叉），其中具有两个稳定竞争排斥平衡的经典Lotka-Volterra型场景突然改变为具有三个局部稳定实体的新场景;即两个竞争排斥平衡和一个稳定共存循环。这种情况是新颖的，因为它预测的竞争共存的两个几乎相同的物种在一个单一的限制资源，这样做的情况下，种间竞争增加。这一预测与竞争理论的经典原则相矛盾。
Summary 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.