广州帽峰山次生林主要种群生态位宽度与重叠研究

分别采用Shannon-Wiener指数和Simpson指数的倒数计算并分析了广州帽峰山次生林乔木层15个主要种群的生态位宽度,2种生态位宽度计算公式的测度结果及其标准化结果一致表明：除少数种群的生态位宽度较大外，大多数种群的生态位宽度较小，反映其群落结构的单调性．利用生态位相似性比例计算种对之间的生态位重叠值，结果表明：种群相互之间的生态位重叠程度不高，对资源利用的相似性较低，群落处于演替阶段，且生态位重叠值的大小与其生态位宽度不呈明显相关性．

Niche Breadth and Overlap of Main Populations of the Secondary Forest Community in Maofengshan,Guangzhou

Two common formulas(Shannon-Wiener index and the reciprocal of Simpson index) were used to calculate the niche breadths among 15 populations of the arborous layer of the secondary forest community in Maofengshan.The niche breadths of most populations were narrow,while few populations were wide,which reflected a simpler community structure.The niche overlaps of 15 main populations were calculated using the niche similarity proportion,which revealed the inter-population niche overlaps and similarities using resources were not higher and the secondary community stayed in a stage of succession.The relationship between the niche overlap and breadth was not obviously correlated.