摘要
Ｍｅｔａ－种群观点为在局部种群之上的空间尺度上描述种群的生态学过程提供了一种途径。但是由于植物所拥有的若干特殊性质（如种子休眠、有限扩散和局部适应）使得对某些植物种使用原有的Ｍｅｔａ－种群概念和模型存在许多困难。因此，为了能更精确地反映植物Ｍｅｔａ－种群动态，本文将Ｍｅｔａ－种群动态分解为斑块内局部种群动态和斑块间的扩散过程两个分量。用Ｌｏｇｉｓｔｉｃ方程表述每个斑块内的局部种群动态，用扩散系数ε表示斑块间的扩散，建立了描述Ｍｅｔａ－种群动态的耦合映象格子模型。对单峰映象ｘｎ＋１＝１－ａｘ２ｎ给出了耦合映象格子的时空行为，这对Ｍｅｔａ－种群动态的研究可能是非常重要的。
Metapopulation perspective has provided a means of describing ecological processes at a spatial scale above the local population.There are many difficulties of imposing current concept of metapopulations on many plant species because plants possess a number of special features (for example,seed dormancy,restricted dispersal and local adaptation).Metapopulation dynamics were broadly defined as the product of the local population dynamics within patches and the dispersal between patches so that it more accurately reflects the dynamics of plant metapopulation.The logistic model used to describe the local population dynamics,the spatial dispersal was represented by a dispersal coefficient.Author gave the coupled logistic map lattices model of describing metapopulation dynamics.The model for logistic map x n+1 =1-ax 2 n shows many interesting types of spatiotemporal behaviour which may be important as considering the dynamics of the real populations.
出处
《植物生态学报》
CAS
CSCD
北大核心
1998年第5期448-454,共7页
Chinese Journal of Plant Ecology
