摘要
为探讨地形对景观尺度植被格局的影响 ,在对三峡大老岭山地森林的大量群落学调查基础上 ,采用 7个指标刻画群落生境的地形特征 ;利用去势典范对应分析 (DCCA)排序方法分析不同群落类型的地形分布格局 ;并定量分离地形、空间及其交互作用等因素对植被格局总体变异的影响。结果表明 :上述 3方面的贡献分别是 9.5 0 %、5 .94%和 6 .81% ,地形对植被格局的控制作用显著 ;但仍有 77.75 %的变异未得到解释。
The paper aims to explore the influence of topography on the pattern of vegetation on landscape scale. Based on the investigation of a large number of forest communities at Dalaoling Mountain in the Three Gorges, 7 indexes were used to figure out the topographical characteristics of habitats. The topographical pattern of different communities were analyzed with detrended canonical correspondence analysis (DCCA) ordination, and the influence of topographical factors, spatial factors and their interaction on the total variance of vegetative pattern were quantitatively partitioned. The results suggested that, the contribution of the 3 aspects is 9.50%, 5.94% and 6.81%, respectively. Topography shows dominant controlling effect on the vegetative pattern at Dalaoling. But 77.75% of the variance were not interpreted yet.
基金
三峡工程环保补偿科研类项目!(三环科 1_0 3_0 2_0 3_0 2 )
中国科学院植物研究所植被数量生态开放实验室开放基金项目!(LP95 0 9)&&
关键词
空间格局
地形
DCCA排序
森林植被
三峡地区
Dalaoling in the Three Gorges
spatial pattern of vegetation
topographic interpretation
canonical correspondence analysis
ordination
