羊草小群落扩散过程的初步分析

本文以初始时没有羊草种群定居的弃耕地植物群落演替为例,利用常规生态学调查方法,对调查结果进行数学生态分析,着重研究了羊草小群落(microcommunity)的形成及其内部无性繁殖的分蘖植株的二维扩散(diffese)过程。并初步分析了羊草种群通过有性繁殖的种子的被动散布(dispersal)将所侵入地段的相对广大的空间(面积),划分为无数个具有有限面积的单元,解决种群最大限度地占有空间的格局问题。羊草种群又在已经占据的每一个面积单元上,依靠无性繁殖的分蘖植株的主动扩散,以一定的速度在有限时间内发展种群优势,解决了种群在单位空间内充分发展的时间和速度,这对于羊草种群在最短时间内占有最大限度的空间,有着重要的生态学意义。

PRELIMINARY ANALYSIS OF THE DIFFUSION PROCESS OF LEYMUS CHINENSIS MICROCOMMUNITY

The example of the succession of the plant community on abandoned field in which Yang-chao (Leytnus chinensis) community didn't settle originally is given in this paper to emphasis the research, that was carried out with common ecological methods, on the formation of Yang-chao microcommunity, and the two-dimension diffusion process of the asexual-reproductioned tillering sta ndings of Yang-chao in the microcommunity.The discussion centres on following aspects: The relatively extensive area of the place inva...