• 根据两田鼠种群波动周期性、波动峰值出现时间以及特定年份峰值高度等特征,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.

    youdao

  • 环境变化较大时,白色噪音水平(变动系数)增加至35%,稳定种群变为不稳定型。

    When the environment variations are high, the white noise level (coefficient of variation) increases to 35%, the stable fish population becomes spasmodic.

    youdao

  • 结果表明,沟谷热带雨林各层次中的乔木种群组成稳定的,常常时间而改变

    The result shows that the composition of tree populations is unstable and changes with time.

    youdao

  • 结果表明,沟谷热带雨林各层次中的乔木种群组成稳定的,常常时间而改变

    The result shows that the composition of tree populations is unstable and changes with time.

    youdao

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