五针白皮松在群落演替过程中的种间联结性分析  

An analysis of interspecific associations of Pinus squamata with other dominant woody species in community succession

作　　者：张志勇[1] 陶德定[1] 李德铢[1] 

机构地区：[1]中国科学院昆明植物研究所

出　　处：《生物多样性》2003年第2期125-131,共7页Biodiversity Science

基　　金：中国科学院知识创新工程重点项目 (KSCX- 2 - 1- 0 6B)

摘　　要：通过方差分析、χ2 检验和共同出现百分率PC等的计算 ,对五针白皮松 (Pinussquamata)分布的群落中主要树种间的种间联结性进行了定量分析。研究结果表明 :2个五针白皮松分布的群落总体种间关联性为显著正相关 ,其中半阳坡上的群落为正相关 ,阴坡上的群落为显著正相关。由于半阳坡上的群落为针阔叶混交林 ,而阴坡上的群落为常绿阔叶林 ,表明五针白皮松分布的群落有从针阔叶混交林向常绿阔叶林演替的趋势。χ2 检验和共同出现百分率PC的结果说明 ,阴坡群落的树种间有较密切的正相关 ,五针白皮松与其他树种总体上无关联性 ,表明五针白皮松是一个阳性先锋树种 ,它与其他物种的共同出现往往是由于随机的因素。同时 ,通过五针白皮松年龄结构并联系云南松 (Pinusyunnanensis)与其他物种关系的分析得出结论 ,五针白皮松的濒危状况可能是在长期的植被演化过程中被阔叶树种排挤所造成的。Pinus squamata is an extremely endangered pine from northeast Yunnan Province of China, which was reported from only one locality where there are 32 individuals in the field. In order to analyze its ecological relationships with other trees and shrubs, a series of techniques, including analysis of variance, χ2 test and percentage of co-occurrence, were used to analyze interspecific associations of dominant woody species in communities with P. squamata. The results indicated significantly positive correlation of the association of overall woody species in the two communities with P. squamata. There is also significantly positive correlation in the community on the north facing slope, but only a positive correlation in the community on the south-west facing slope. Considering that the community on the south-west facing slope is mixed coniferous and broad-leaved forest and that on the north facing slope is evergreen broad-leaved forest, the results imply that the communities with P. squamata may be in succession from mixed coniferous and broad-leaved forest to evergreen broad-leaved forest. Combined with the data of χ2 test and percentage of co-occurrence, we conclude that P. squamata has no significant correlation with other woody species, and its co-occurrence with other trees may be by chance. Finally, its requirements for survival may be threatened by evergreen broad-leaved woody species.

关 键 词：PINUS SQUAMATA 群落演替 种间联结 

分 类 号：Q948.15[生物学—植物学]