Zu Jian, Wang Wendi, Takeuchi Yasuhiro, Zu Bo, Wang Kaifa
School of Sciences, Southwest Petroleum University, Sichuan Province 610500, PR China.
J Theor Biol. 2008 Sep 21;254(2):239-51. doi: 10.1016/j.jtbi.2008.06.001. Epub 2008 Jun 12.
This paper considers the coevolution of phenotypic traits in a community comprising two competitive species subject to strong Allee effects. Firstly, we investigate the ecological and evolutionary conditions that allow for continuously stable strategy under symmetric competition. Secondly, we find that evolutionary suicide is impossible when the two species undergo symmetric competition, however, evolutionary suicide can occur in an asymmetric competition model with strong Allee effects. Thirdly, it is found that evolutionary bistability is a likely outcome of the process under both symmetric and asymmetric competitions, which depends on the properties of symmetric and asymmetric competitions. Fourthly, under asymmetric competition, we find that evolutionary cycle is a likely outcome of the process, which depends on the properties of both intraspecific and interspecific competition. When interspecific and intraspecific asymmetries vary continuously, we also find that the evolutionary dynamics may admit a stable equilibrium and two limit cycles or two stable equilibria separated by an unstable limit cycle or a stable equilibrium and a stable limit cycle.
本文考虑了一个包含两个受强阿利效应影响的竞争物种的群落中表型性状的协同进化。首先，我们研究了在对称竞争下允许连续稳定策略的生态和进化条件。其次，我们发现当两个物种进行对称竞争时，进化自杀是不可能的，然而，在具有强阿利效应的不对称竞争模型中，进化自杀可能会发生。第三，发现在对称和不对称竞争下，进化双稳态都是该过程可能产生的结果，这取决于对称和不对称竞争的特性。第四，在不对称竞争下，我们发现进化循环是该过程可能产生的结果，这取决于种内和种间竞争的特性。当种间和种内不对称性连续变化时，我们还发现进化动力学可能允许一个稳定平衡和两个极限环，或者两个由一个不稳定极限环分隔的稳定平衡，或者一个稳定平衡和一个稳定极限环。
