Vasseur David A
Department of Biological Sciences, University of Calgary, Calgary, AB, Canada T2N 1N4.
Theor Popul Biol. 2007 Sep;72(2):186-96. doi: 10.1016/j.tpb.2007.06.002. Epub 2007 Jun 12.
Noise in environmental variables is often described as 'coloured', where colour describes the exponent beta of the scaling relationship between the amplitude of variability and its frequency of occurrence (1/f(beta)). Different environments are known to have different colours and models have shown that colour can have important impacts upon population persistence and dynamics. This study advances current knowledge about the impact of environmental colour using a trophic model (consumer-resource) experiencing environmental noise (temperature) in a biologically realistic manner--derived mechanistically from metabolic scaling theory. The model demonstrates that the variability of consumers and resources can respond differently to changing environmental colour, depending upon (i) their relative ability to track and over or undercompensate for environmental changes and (ii) the relative sensitivity of their equilibria to environmental changes. These results form the basis with which to interpret differences and facilitate comparisons of the variability of ecological communities across gradients of environmental colour.
环境变量中的噪声通常被描述为“有色的”，其中颜色描述了变异性幅度与其出现频率之间的标度关系的指数β（1/f(β)）。已知不同的环境具有不同的颜色，并且模型表明颜色会对种群的持久性和动态产生重要影响。本研究以一种生物学上现实的方式（从代谢标度理论机械推导得出），使用一个经历环境噪声（温度）的营养模型（消费者 - 资源模型），推进了关于环境颜色影响的现有知识。该模型表明，消费者和资源的变异性对环境颜色变化的反应可能不同，这取决于：（i）它们跟踪以及过度或不足补偿环境变化的相对能力；（ii）它们的平衡对环境变化的相对敏感性。这些结果构成了解释差异的基础，并有助于比较不同环境颜色梯度下生态群落的变异性。
