Catastrophic factors Storms, high temperatures, etc.
Densities tend to return to the average.
Life cycle of oak winter moth. However, is the over winter disappearance due in main to egg death early larval death death by ballooning, etc. Modern Synthesis Limiting factor - a change in the factor produces a change in average or equilibrium density. Regulating factor - the percentage mortality caused by the factor increases with population density. Stability Populations range from stable to unstable.