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在建立S2 =a′( -lnP0 ) b′模型的基础上 ,结合Gerrard&Chiang模型 (m =α( -lnP0 )β)和扩散系数C ,本文提出一个种群空间格局研究的零频率方法。根据种群聚集临界零频率 (P0 0 =exp〔 - ( αa′) 1/(b′-β)〕) ,可对空间格局连续统作出定量描述 ,按参数 (b′ - β)可将生物种群划分为“聚集度非零频率制约型”、“聚集度逆零频率制约型”和“聚集度零频率制约型”3种类型。通过 1 0种生物种群资料的实例验证 ,证明新模型能客观地反映出种群空间格局的本质特征。此外 ,文中还推导出了确定理论抽样数的公式和序贯抽样决策模型。
Based on the establishment of S2 = a ’(-lnP0) b’ model and the combination of Gerrard & Chiang model (m = α (-lnP0) β) and diffusion coefficient C, a zero frequency method for population spatial pattern research is proposed. According to the critical zero frequency of population aggregation (P0 0 = expα - αa ’) 1 / (b’-β)], the spatial pattern can be described quantitatively. According to parameter (b’ - β) Divided into “non-zero concentration of the frequency control type”, “convergence of the frequency of zero-frequency control type” and “zero-frequency aggregation degree” three types. The case study of 10 species of population data proves that the new model can objectively reflect the essential characteristics of the spatial pattern of the population. In addition, the article also deduced the formula to determine the theoretical number of samples and sequential sampling decision-making model.