关于可变环境中种群增长的一则注释。

A note on population growth in a variable environment.

作者信息

Smith R H, Mead R

机构信息

Department of Zoology, Univeristy of Reading, Reading, Berkshire.

Department of Applied Statistics, University of Reading, Reading, Berkshire.

出版信息

Oecologia. 1975 Dec;20(4):333-337. doi: 10.1007/BF00345523.

DOI:10.1007/BF00345523

PMID:28308706

Abstract

Some properties of diffusion approximations to models of population dynamics in a variable environment are noted and discussed. A counter-intuitive feature of these models is that a larger mean population can lead to instability, given a particular level of variation. The need to consider different types of stochastic variation is stressed. Migration is shown to be either stabilising or destabilising, depending on the balance of effects of different types of variation.

摘要

文中指出并讨论了可变环境中种群动态模型扩散近似的一些性质。这些模型一个违反直觉的特征是，在特定的变化水平下，更大的平均种群可能导致不稳定性。强调了考虑不同类型随机变化的必要性。结果表明，迁移的作用取决于不同类型变化影响的平衡，它既可能起到稳定作用，也可能起到破坏稳定的作用。