作　　者： ; ; ;

机构地区： 暨南大学生命科学技术学院水生生物研究所

出　　处： 《生态科学》 2009年第5期414-419,共6页

摘　　要： 采用Levins,Shannon-Wiener生态位宽度公式和Levins生态位特定重叠指数公式对皇甫川流域天然草地恢复演替不同阶段植物群落中优势种生态位宽度和生态位重叠进行了测定,并分析各种群生态位宽度和生态位重叠的生态学意义。结果表明:演替过程中每一群落类型的优势种具有最大的生态位宽度;生态位宽度在演替序列的动态变化与种群动态有较好的对应关系;生态位重叠越大,种群间的生态相似性越大,利用资源的相似性程度越高,种间竞争可能越激烈;竞争是促使流域内各植物群落向顶级群落演替的一种动力机制。 Niche breadths and overlaps of dominant species in restoring succession processes plant community in Huangpuchuan Watershed were measured using a series of indices proposed by Levins, Shannon-Wiener, and ecological significance of niche breadths and overlaps of each community was analyzed. The results show that each typical community is marked absolutely by one species with the largest niche breadth. Dynamic changes of niche breadth in restoring succession are correspondingly related with the changes of populations. Greater niche overlaps will result in more similarities in ecology and resource use of populations, thus leads to a more intense interspecific competition. Competition is a potential dynamic mechanism promoting different plant communities to the climax community in the watershed.

关 键 词： 皇甫川流域 群落演替序列 生态位宽度 生态位重叠

领　　域： [生物学] [生物学]