摘要
采用TWINSPAN分类和PCA、CCA排序的方法对辽东山区样方数据进行植物群落数量分析。结果表明:分类和排序是分析植被与环境关系的有效途径。CCA指示了植物群落与环境因子之间的相关关系。MRPP检验表明,特定的植物群落和环境因子的组合是客观存在的,这种特定的组合构成了特定的生态系统单元。本研究共得到6种群落类型,能够基本指示研究区潜在的植被类型,可用于表征生态土地分类中分类单元的植被类型。制约辽东山区森林群落类型、植物种分布格局的主要因素是坡向、坡度的变化,可将其作为生态土地分类的依据。
Quantitative classification and ordination aiming to realize muhifactor ecological land classification was developed for the mountainous region in eastern Liaoning Province. Data for ground flora and canopy trees species from selected stands were summarized and subjected to TWINSPAN classification and PCA, cCA ordination. CCA indicated that slope and aspect were highly correlated with the ground flora and canopy tree species. Pairwise MRPP tests indicated many significant differences （ P 〈 0.05） among the vegetation groups and environmental factors. 6 types of plant community, which can be used to indicate the vegetation type in ecological classification system, were based on cluster analysis of the six most environment factors. The vegetation of the mountainous region in eastern Liaoning Province was believed to be related a moisture and nutrient gradient which was mainly influenced by slope and aspect, which can be used as criterion in ecological land classification.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2008年第3期6-12,共7页
Scientia Silvae Sinicae
基金
国家科技部863计划资助项目(2006AA10Z251)
国家科技支撑计划项目(2006BA003A09)
关键词
植物群落数量分析
生态土地分类
环境因子
辽东山区
quantitative classification and ordination
ecological land classification
environmental factors
mountainous region in eastern Liaoning Province
