恩施不同红椿群落α多样性与种群分布格局相关分析  

Correlation Analyses on α Diversity of Different Toonas ciliata Communities and Population Distribution Pattern in Enshi Region

作　　者：江雄波[1] 张敏[1,2] 汪洋[1] 刘芳芳[1] 陈政 

机构地区：[1]湖北生态工程职业技术学院,武汉430200 [2]华中农业大学园艺林学学院,武汉430064

出　　处：《湖北农业科学》2016年第15期3923-3928,共6页Hubei Agricultural Sciences

基　　金：湖北省科技厅公益性研究项目"湖北重要珍贵用材树种红椿种质资源收集与优树选择"(402012DBA40001)

摘　　要：为研究恩施地区红椿(Toona ciliata Roem.)群落α多样性与红椿种群空间分布格局的相关性,采用样方法对恩施4个不同红椿天然群落样地进行调查。对群落α多样性指数与种群空间分布格局相关性分析表明,群落草本与灌木层α多样性指数相关性较低;草本与乔木层α多样性指数之间存在较强负相关;灌木与乔木层α多样性表现为显著或极显著正相关。红椿群落群层间α多样性与种群分布格局相关性表明,群落草本层的多样性与红椿种群分布格局间相关性较低;种群分布格局与灌木和乔木α多样性呈高度负相关。研究表明,群层间α多样性存在较为不同的相关性,可能是由于竞争中不平等的资源分配,影响红椿群落物种的演替方向;红椿群落乔灌层的α多样性指数越高,对红椿种群的分布格局影响越大,促使红椿种群分布格局趋于泊松分布。Targeting the correlation between α diversity of different Toona ciliata Roem. communities and population distribution pattern in Enshi Region,the quadrat sampling method was employed to survey four T. ciliata communities. The correlation analyses on α diversity of the four communities and population distribution pattern indexes were conducted and the results revealed that the various α diversitiey indexes of herb layers and shrub layers had insignificant correlation;the α diversitiey indexes between herbs and trees were negatively correlated;the α diversitiey indexes between shrubs and trees illustrated significant positive correlation,some even having highly significantly positive correlation. The correlation analyses between various αdiversity indexes and population distribution patterns indicated the correlation between α diversity indexes and distribution pattern indexes was comparatively low,but the α diversity indexes of shrubs and trees were highly negative correlated with those of distribution patterns. The research showed that α diversity indexes of various vegetation layers had various correlation,which might result from unbalanced resource distribution in the competition,which might direct the succession of different species;the higher the α diversitiy indexes of shrub and treee layers, the stronger the impact on population distribution patterns,which prompted T. ciliata population to accord the competition in Poisson distribution pattern.

关 键 词：红椿(Toona ciliata Roem.) Α多样性 种群格局 相关分析 恩施 

分 类 号：S792.33[农业科学—林木遗传育种] Q145+.1[农业科学—林学]