摘要
采用Shannon-wiener多样性指数、Pielou群落均匀度指数、Simpson生态优势度,以不同样地作为一维资源轴,以物种重要值作为生态位计测的状态指标,采用Levins和Hurlbert公式计算生态位宽度,用Schoener计算生态位相似性比例、生态位重叠值对宝兴县东拉山野桂花群落的物种多样性进行分析和乔木优势种的生态位特征进行了研究。结果表明:野桂花群落灌木层物种丰富度、多样性指数、均匀度指数均最高,而乔木层最低,优势度乔木层最高,草本层最低。野桂花的生态位宽度最大,与其他优势种的生态位相似性比例值较大,但生态位重叠值却较小,说明野桂花在种群中与其他乔木优势种利用环境资源的相似程度较大,而与其他种的潜在竞争关系较小。
In this paper, using ological dominance and taking Shannon-wiener species diversity index, Pielou evenness index, Simpson ecologiocal dominance and taking the different plots as one-dimension resource states and the important value as the resource state descriptor, researches are conducted on the species diversity, the niche, the niche breadths, niche proportional similarity and overlapping of the populations in Osmanthus serrulatus community in Dongla of Baoxing County by means of Levins, Hurlbert and Schoener calculation methods. The resuits have shown that the richness index , species diversity index and the evenness index of the shrub layer are the highest, those of the tree layer are the lowest. However, the ecological dominance of the tree layer is the highest, and that of the herb layer is the lowest. The niche breadth of Osmanthus serrulatus is higher than that of other dominant species. The proportional similarity of Osmanthus serrulatus is higher than that of other dominant species, but its niche overlapping is lower. Those results have indicated that the similarity degree of its using resource is higher and but its potential competition is lower, as compared with other dominant species.
出处
《四川林业科技》
2007年第4期48-51,9,共5页
Journal of Sichuan Forestry Science and Technology
基金
国家"十一五"科技支撑项目西南山区退化天然林恢复与经营技术试验示范(2006BAD03A10)
关键词
野桂花
多样性
生态位宽度
相似性比例
生态位重叠
Osmanthus serrulatus Rehd, Species diversity, Niche breadth, Proportional similarity, Niche overlapping
作者简介
陈俊华（1972-），男，工程师，主要从事计算机及GIS在森林生态方面的应用研究。
