Morrison G, Barbosa P
Department of Entomology, University of Maryland, 20742, College Park, MD, USA.
Oecologia. 1987 Oct;73(4):609-614. doi: 10.1007/BF00379424.
Simulation models have recently been used to suggest that spatial heterogeneity, acting on small spatial scales within local populations, may allow parasitoids and other natural enemies to "regulate" host or prey populations in ways that would not be detected by conventional (k-factor) analyses of life table data. However, additional study of these models suggests that local extinction may be a frequent event in the simulated interactions. The "spreading of risk" concept appears more applicable to the simulated populations than a classical view emphasizing tight regulation around stable equilibrium points. The spreading of risk viewpoint also appears to shed additional light on questions raised in the recent debate between Dempster (1983); Hassel (1985); Dempster and Pollard (1986), concerning the modeling of spatial heterogeneity and "regulation" in temperate-zone insect populations.
最近，模拟模型被用于表明，作用于当地种群内小空间尺度上的空间异质性，可能使寄生蜂和其他天敌以传统（k因子）生命表数据分析无法检测到的方式“调节”寄主或猎物种群。然而，对这些模型的进一步研究表明，在模拟的相互作用中，局部灭绝可能是一个常见事件。“风险扩散”概念似乎比强调围绕稳定平衡点进行严格调节的经典观点更适用于模拟种群。风险扩散观点似乎也为邓普斯特（1983年）、哈塞尔（1985年）、邓普斯特和波拉德（1986年）最近关于温带昆虫种群空间异质性建模和“调节”的辩论中提出的问题提供了更多启示。
