摘要
选择恩施马鹿河完整天然红椿(Toona ciliata)群落设置400 m2样地,建立了16个5 m×5 m样方,采用相邻格子法进行调查,研究群落α多样性和红椿种群格局。结果表明,群落α多样性指数表现为灌木﹥草本﹥乔木,各林层α多样性呈显著正相关。25、50、100 m2取样,7个种群空间分布数学模型表明,红椿的天然种群以泊松分布为主要特征,100 m2尺度上为均匀分布。Iwao回归模型:m*=-2.412+1.868 x,和上述7个模型结论一致。保护红椿群落物种α多样性有利于促进红椿种群稳定;红椿天然种群以泊松分布为基本分布特征。
16 sample plots（5 m×5 m in size） covering 400 m2 of a whole natural Toona ciliata community were established in the Maluhe River valley,Enshi region,with contiguous grid quadrate method,α diversity of T. ciliata community and its population pattern were researched. The research results indicated that the α diversity of the community in richness ranges as follows：shrubherbtree,and the α diversity of different plant layers has significant positive correlation. With 25,50 and 100 m2 as size samples,through 7 different mathematical models fathoming spatial distribution pattern of T. ciliata population,the result illustrated that natural T. ciliata population showd Poisson distribution in 25 m2 and 50 m2 sample size,while uniform distribution in 100 m2 sample size. The regression of Iwao model：m＊ =-2.412 ＋1.868 x,according with the research result of above-mentioned 7 models. The conclusion demonstrated that the protection of α diversity of T. ciliata community facilitates the stabilization of the population;typical distribution pattern of natural T. ciliata population features Poisson distribution.
出处
《湖北农业科学》
2016年第9期2265-2268,共4页
Hubei Agricultural Sciences
基金
湖北省科技厅公益性研究项目(40 2012DBA40001)
作者简介
冷艳芝（1978-），女，湖北武汉人，工程师，主要从事林业技术的教学与科研工作，（电话）18963976381（电子信箱）541469483@qq．com；
通信作者，宋菲（1978-），女，湖北武汉人，工程师，主要从事林业技术工作，（电话）13971174902（电子信箱）506448615@163．com。
