生物种群的季节性消长常常具有峰形曲线的趋势,而且生物种群在一维生态位上的频数分布也常常表现为峰形曲线。由于这些数据是从调查试验中取得,往往上下波动较大,不能构成光滑的曲线,因而使模型选择无所遵循,即使有了模型也难以很好的拟合。有人曾对季节性生物种群消长的数学模型作了研究,并得出了8种模型。但由于数学计算复杂,参数 The seasonal fluctuation of biological populations tends to have a peak-shaped curve, and the frequency distribution of biological populations in one-dimensional ecological niches often also appears as a peak-shaped curve. Since these data are obtained from the investigation, they often fluctuate greatly up and down and can not form a smooth curve, so that the model selection fails to be followed and the model can not be well fitted even if the model is available. A mathematical model of seasonal population decline has been studied and eight models have been derived. However, due to the complex mathematical parameters