元宝山冷杉群落主要树木种群生态位的初步研究

A Study on the Niches of Main Tree Populations in Abies yuanbaoshanensis Community

根据群落类型和其在演替时间轴上的前后顺序综合出一个资源序列 ,样地作为资源位 ,采用定量的方法对元宝山冷杉群落 16个主要树种的生态位进行计测。结果表明 :五尖槭的生态位宽度最大 ,为 4 .70 94 ;元宝山冷杉、南方红豆杉、大八角次之 ,分别为 4 .5 830 ,4 .35 87,3.96 6 0 ;细枝柃、灯笼树的生态位宽度较小。元宝山冷杉与其它一些优势种 ,如南方红豆杉、红皮木姜、南方铁杉的重叠值较大 ,与其余多数物种的重叠值都不大 ;群落中多数树种间有较高的生态位相似性 ,表明群落中主要树种对资源有较明显的共享趋势。其计测结果可作为进一步研究元宝山冷杉群落结构、动态及种间关系的基础 。

On the basis of being taken the sample stands as resource status,the niches of 16 main tree populations on Yuanbaoshan Mountain,Guangxi Province were analyzed by quantitative methods.The results showed that Acer maximowiczii has the biggest niche breadth,its value was 4 7094 .The niche breadths of Abies yuanbaoshanensis,Taxus chinensis var.mairei,Illicium majus and Listea pedunculata were larger,which value were 4 5830, 4 3587, 3 9660, 3 5843 respectively.While Eurya loquaiana and Enkianthus had smaller niche breadth.The niche overlaps between Abies yuanbaoshanensis and most of other trees in the community were smaller,and which may be one of the reasons that Abies yuanbaoshanensis and other tree populations could coexist persistently.The niche similarities between most of tree populations in Abies yuanbaoshanensis community were much greater,showing that the main tree populations in Abies yuanbaoshanensis community had greater resource sharing degree.The results of this paper could provide the basis for studying community structure,succession and relations of intraspecific in further,and be available to the Abies yuanbaoshanensis protection.