云南肉豆蔻植物种群结构及动态研究

Population structure and Dynamics of Myristicaceae yunnanensis in Xishuangbanna of Yunnan

采用样地法对西双版纳热带雨林云南肉豆蔻植物种群年龄结构、空间结构等特征展开调查。将调查内容和相应数据进行统计分析后,总结得到云南肉豆蔻植物种群总体呈衰退型特征;空间结构分布特征用最小距离法检验、空间分布指数法检验、负二项参数(k)法检验、丛生指数法检验、平均拥挤度(m~*)与聚块性指标(m~*/m)法检验,结果均表明云南肉豆蔻种群分布呈集群分布;根据调查数据绘制云南肉豆蔻种群特定时间生命表、存活曲线、线性回归方程及显著性检验,结果表明种群呈衰退型结构特征,线性回归方程为直线型。

Choosing the Myristicaceae yunnanensis populations in tropical rain forest of Xishuangbanna as the study target, the age structure and spatial structure were investigated through sampling plot method. It was found that Myristicaceae yunnanensis populations showed the tendency of decline. As far as the spatial distribution characteristics was concerned, and by use of the methods such as minimum distance, spatial distribution index, negative binomial parameter, clumping index, average crowded degree or index of patchiness,all the results indicated that Myristicaceae yunnanensis populations displayed the aggregated distribution pattern. Time-specific life table, survival curve, equation of linear regression and significance test all exhibited the characteristics of population decline. The equation regression was linear type.