根据两种田鼠种群波动周期性、波动峰值出现的时间以及特定年份峰值的高度等特征，证明两物种波动均具有不稳定性。
Population fluctuations of both species were erratic in respect to annual occurrence, the time of the peak density of fluctuations within years, and the hight of peak the density a given year.
有一种假说认为，这是一种自然现象；在特别适合产卵的那几年后，刺冠海星自然会经历种群数量的波动。
One hypothesis is that it's a natural phenomenon, that the starfish naturally undergo population fluctuations following particularly good spawning years.
在不同种群之间，种群大小的波动方式存在显著的差异。
However, there are distinguishable differences among populations in the way the population size fluctuates.
种内和种间的空间分离种群同步性波动的证据在文献中随处可见。
Evidence for synchronous fluctuations of spatially separated population is ubiquitous in the literature.
该种群对环境波动、灾害和栖息地的变化较为敏感。
The population size is sensitive to the fluctuating environment, catastrophes and the change of carrying capacity.
本文根据种群遗传学的基本原理和试验证据提出了农药的毒力波动规律。
According to the basic principles of population genetics and experimental evidence, the Virulence Wave Law of pesticides was advanced in this paper.
对小型哺乳动物种群数量周期性波动的外因调节假说进行介绍，概述了食物假说、捕食假说和复合因子假说的主要内容和研究进展。
This paper reviewed the new progress in the theory and hypothesis of population regulation in small mammals, focusing on the food hypothesis, predation hypothesis and multi-factorial hypothesis.
种群的死亡过程和繁殖过程使种群平均密度有较明显的波动，但对种群总体水平无明显影响，种群结构也无明显变化。
The death and reproduction of the population make the mean density fluctuate but do not obviously change the overall level of population number and the population structure.
结果建立了单种群细菌波动生长与环境关系数学模型。
Results a mathematical model of the relationship between the bacterial wave growth and environment was established.
结果建立了单种群细菌波动生长与环境关系数学模型。
Results a mathematical model of the relationship between the bacterial wave growth and environment was established. Conclusion This model is veri...
结果建立了单种群细菌波动生长与环境关系数学模型。
Results a mathematical model of the relationship between the bacterial wave growth and environment was established. Conclusion This model is veri...
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