摘要
通过对２２种生物种群资料Ｌａ－ｍ关系的研究，提出一个种群空间格局研究的Ｌａ－ｍ幂法则模型（Ｌａ＝θｍδ），并对模型参数的生物学意义进行了探讨。根据种群聚集临界密度（ｍ０＝θ１／（１－δ）），可对空间格局连续统作出定量描述，按参数δ可将生物种群划分为“聚集度逆密度制约型”、“聚集度密度制约型”和“聚集度非密度制约型”３种类型。与Ｔａｙｌｏｒ模型和Ｉｗａｏ模型相比，Ｌａ－ｍ幂法则模型具有更广泛的适用性和较高的可靠性，能客观、真实地反映出种群空间格局的本质特征，充分显示出它的独到之处。
By studying the Lam relation of 22 kinds of biologic population,a Lam power law model(Laθmδ)for study of population space pattern was advanced,and the biological significance of the model parameters was discussed.Using the critical density of the population crowding(m0=θν(1-δ)),the successive system of space pattern was quantitatively described.The biological populations could divide into three types according to the parameter δ:restriciton type of contrary density of crowding level,restriction type of density of crowding level,restriction type of non-density of crowding level.Contrasting with models of Taylor and Iwao,Lam power model has more extensive applicability and high reliability,and could reflect objectively and actually the characteristic of population space pattern.
出处
《河北林果研究》
1997年第1期78-82,共5页
Hebei Journal of Forestry and Orchard Research
关键词
La-m
种群聚集
临界密度
种群空间格局
Lam power law
critical density of the population crowding
population space pattern
