入侵杂草化感作用的细胞自动机模拟研究

细胞自动机模型(Cellular Automata Model，简称CA模型)是一种能够表现系统复杂行为的模拟方法，适于研究植物群落时空动态过程.本文利用CA模型，模拟具有化感作用的外来种入侵原有物种所构成植被的过程.模型由产生化感物质的外来种和两个对化感物质敏感性不同的本地种组合成不同类型的群落，利用化感物质作用下受体物种生物活性响应模型及种子扩散负指数分布模型，模拟外来杂草和本地种分布格局的时空动态变化.结果表明，外来种可成功地完全入侵由两个对化感物质敏感的本地种构成的群落空间，但对于由对化感物质敏感的一个本地种及对化感物质具有抗性的另一个本地种构成的群落，外来种只能够与本地种共存.

Allelopathy of invasive weeds:A simulation study with cellular automata model

Cellular automata model is a simulation approach to describe the complicate behavior of a system, and suitable to study the spatial and temporal dynamics of plant community. In this paper, the model was used to simulate the different sensitivity toall invasion process of an alleloehemicals-containing exotic species to the community of two native species with different sensitivity to allelochemicals, and the spatial and temporal dynamics of native and invasive species. The simulation was conducted by biological response and negative exponential distribution models, and the results showed that exotic species could successfully invade the community of two native species with different sensitivity to allelochemicals, hut only coexist with one sensitive and one resistant species, The resistance of plant community to invasive weeds depended on its species function structure.