馨香玉兰及其伴生树种的生态位研究  

Ecological Niche of Endangered Plant Magnolia odoratissima and Its Associated Tree Species

作　　者：邵金平[1] 李贵祥[1] 柴勇[1] 毕波[1] 蔡雨新[1] 李品荣[1] 方波[1] 

机构地区：[1]云南省林业科学院,云南昆明650201

出　　处：《西部林业科学》2015年第1期64-68,共5页Journal of West China Forestry Science

基　　金：林业公益性行业科研专项(201304306);云南省基金面上项目(2007C122M)

摘　　要：在云南西畴县及麻栗坡县馨香玉兰天然分布比较集中的地区进行了馨香玉兰的群落学调查，以研究馨香玉兰及其伴生树种的生态位特征。结果表明，馨香玉兰在所调查的全部样方中均有分布，它的两种生态位宽度指数即B（sw）和B（L）均较高，在资源轴上优势地位明显；馨香玉兰与其他树种的生态位相似性比例在0.403～0.682之间，与群落建群种如青冈、西畴润楠和圆果化香树的相似性程度较高，表明它与这些树种在生境需求上具有一定的相似性，对资源有共享趋势；馨香玉兰与其他树种相互间的生态位重叠值较高，表明馨香玉兰与其主要伴生树种间的竞争较激烈。The community characteristics of M.odoratissima in Xichou county and Malipo county of Yunnan prov-ince were surveyed and analyzed , with the aim to study the niche characteristics of endangered plant M.odoratissima and its associated tree species.The results showed that M.odoratissima was found in all the sample plots surveyed, with high niche breadth （Shannon weiner, Levins index）, and dominant role in resource axis. The niche similarity proportion between M.odoratissima and other tree species ranged from 0.403 to 0.682, with higher similarity to other dominant species in the community such as Cyclobalanopsis glauca, Machilus sichourensis and Platycarya longipes, which indicated that M.odoratissima had similar requirement for habitat with these associ-ated species, and share the environmental resources.Besides the relationship with these dominant species, M.odoratissima had high niche overlap with other tree species in the community.This study indicated the severe competition between M.odoratissima and its associated tree species in the community.

关 键 词：馨香玉兰 伴生树种 生态位 

分 类 号：Q948[生物学—植物学]