摘要
应用TW INSPAN,CCA和partialDCA方法,对黄土高原马栏林区45个森林群落样地进行多元分析,揭示该区不同森林群落类型之间在环境梯度上的生态关系。结果表明:①45个森林群落可划分为8组群落类型;②CCA排序表明,枯枝落叶层厚度、坡向、海拔和有机质含量是影响该区森林群落类型分布的重要实测环境因素;而partialDCA排序表明,干扰是影响该区森林群落类型分布最重要的潜在环境因素;③各森林群落类型在排序图中有规律的分布是群落中物种适应环境的结果,且人工油松林有向天然油松林恢复的趋势;④CCA与partial DCA相结合是研究植物群落生态梯度的一种非常有效的方法。
To identify ecological relationships among different forest community types in the Malan Forest Region on the Loess Plateau,45 forest community plots in the region were evaluated.Twinspan was applied to analyze and classify the forest community types,while CCA and partial DCA were used to study the environmental gradients among these forest community types.The results were as follows:(1) Eight forest types were divided into 45 forest communities;(2) CCA ordination revealed that the litter thickness,aspect,e...
出处
《干旱区研究》
CSCD
北大核心
2009年第2期221-227,共7页
Arid Zone Research
基金
国家重点基础研究与发展规划"973"项目(2002CB111505)
陕西师范大学研究生培养创新基金项目(2007CXS033)
