Chaotic dynamics in an insect population
Chaotic dynamics in an insect population
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DOI：
10.1126/science.275.5298.389
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发表时间：
1997-01-17
期刊：
影响因子：
56.9
通讯作者：
Dennis, B
中科院分区：
文献类型：
--
作者：
Costantino, RF;Desharnais, RA;Dennis, B
利用非线性人口统计模型预测了粉虱Tribolium在实验室条件下的种群动态，并建立了揭示混沌行为的实验方案。在实验设定的成虫死亡率较高的情况下，随着成虫阶段补充率的实验操作，动物丰度的动态从平衡态到准周期循环再到混沌。这些动力学转变与数学模型预测的动力学转变相对应。数据的相空间图与确定性模型吸引子一起提供了向混沌过渡的令人信服的证据。
A nonlinear demographic model was used to predict the population dynamics of the flour beetle Tribolium under laboratory conditions and to establish the experimental protocol that would reveal chaotic behavior, With the adult mortality rate experimentally set high, the dynamics of animal abundance changed from equilibrium to quasiperiodic cycles to chaos as adult-stage recruitment rates were experimentally manipulated. These transitions in dynamics corresponded to those predicted by the mathematical model. Phase-space graphs of the data together with the deterministic model attractors provide convincing evidence of transitions to chaos.