6.In order to understand the nature of the ecologist sinvestigation,we may think of the density-dependent effects on growthparameters as the signal ecologists are trying to isolateandinterpret,one that tends to make the population increase fromrelatively low values or decrease from relatively high ones,while thedensity-independent effects act to produce noise in the populationdynamics.
为了能理解生态学家们所从事的研究的性质,我们可以把那些作用于增长参数的密度依赖效应视作生态学家们力图将其分离并予以解释的 信号 ,正是这一信号倾向于使种群从相对较低的数值递增,或从相对较高的数值递减;而与此同时,那些密度独立效应起到的作用则构成了种群动态变化中的 噪音 。
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