外来植物物种入侵机理及其空间分布模拟

Invasion mechanism and space distribution simulation of exotic plant species

以外来植物物种与本地植物物种为研究对象,建立种间竞争的生态数学模型.采用元胞自动机理论将竞争模型扩展到网络进行模拟研究,分析外来植物物种的空间分布类型.分别计算考虑扩散作用和没有考虑扩散作用情况下的空间分布参数,发现在考虑扩散作用的情况下,外来物种的空间格局发生了改变,空间扩散作用降低了外来植物物种空间分布的聚集程度.

An ecological mathematical model was built to investigate into exotic and native plants and the model was extended to the space for simulations by using the cellular automata theory to analyze the spatial distribution style of the species. Diffusion or non-diffusion was considered, and the indexes of spatial distribution were computed respectively. It was discovered that the spatial framework has been changed with the diffusion, and the aggregation degree of the exotic plants＇ space distribution decreased.