Colour of environmental noise affects the nonlinear dynamics of cycling, stage-structured populations.
Colour of environmental noise affects the nonlinear dynamics of cycling, stage-structured populations.
复制标题
环境噪声的颜色影响循环、阶段结构群体的非线性动力学。
DOI：
10.1111/j.1461-0248.2008.01194.x
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发表时间：
2008
期刊：
影响因子：
8.8
通讯作者：
J. Cohen
中科院分区：
文献类型：
--
作者：
D. Reuman;R. Costantino;R. Desharnais;J. Cohen
种群数量的波动是由于它们的内部动态（可能是非线性和随机的）以及对环境变化的反应。理论预测环境随机性的颜色如何随时间影响总体均值、方差以及与环境的相关性。该理论尚未针对野外系统中常见的循环种群进行测试。我们将不同颜色的噪声应用于循环实验室甲虫种群，并固定噪声的其他统计特性。理论在很大程度上得到了验证，但未能足够详细地预测观察结果。人口循环的主要时期因环境随机性的变化而偏移了33%。对于在没有噪声的情况下以不同方式循环的群体，噪声颜色对群体均值、方差和主导周期性的影响不同。我们的结果表明，部分由人类引起的气候变化颜色的变化可能会影响循环种群的主要周期性，可能会影响工业、害虫管理和保护。
Populations fluctuate because of their internal dynamics, which can be nonlinear and stochastic, and in response to environmental variation. Theory predicts how the colour of environmental stochasticity affects population means, variances and correlations with the environment over time. The theory has not been tested for cycling populations, commonly observed in field systems. We applied noise of different colours to cycling laboratory beetle populations, holding other statistical properties of the noise fixed. Theory was largely validated, but failed to predict observations in sufficient detail. The main period of population cycling was shifted up to 33% by the colour of environmental stochasticity. Noise colour affected population means, variances and dominant periodicities differently for populations that cycled in different ways without noise. Our results show that changes in the colour of climatic variability, partly caused by humans, may affect the main periodicity of cycling populations, possibly impacting industry, pest management and conservation.