小陇山国家级自然保护区次生林分类、排序及演替  

Classification,ordination,and succession of secondary forests in Xiaolongshan National Nature Reserve in west Qinling

作　　者：巨天珍[1] 王彦[1] 任海峰[1] 姚晶晶[1] 王蒙[1] 孟凡涛[1] 王继伟[1] 

机构地区：[1]西北师范大学地理与环境科学学院,兰州730070

出　　处：《生态学杂志》2012年第1期23-29,共7页Chinese Journal of Ecology

基　　金：国家自然科学基金地区科学基金项目(41161080);甘肃省科技支撑计划项目(2010GS05134)资助

摘　　要：在野外调查基础上,采用TWINSPAN和DCA对小陇山林区次生林群落进行了数量分类和排序,从植物群系组成、植物群落与环境的生态关系方面,研究小陇山植被群落的分布格局,用以确定该区次生林演替,并给予合理的环境解释。结果表明:采用TWINSPAN数量分类方法,将植被划分为12个群落类型;DCA排序图明显反映出排序轴的生态意义,第一轴基本上突出反映了湿度变化,沿第一轴从左到右,湿度逐渐增大;第二轴主要表现了温度梯度,沿第二轴从下到上,温度逐渐降低;次生林的演替序列为山杨林→山杨+白桦林→锐齿栎混交林及锐齿栎纯林,其自然恢复演替以锐齿栎林为顶极群落。Based on the field investigation data and by using two-way indicator species analysis （TWINSPAN） and detrended correspondence analysis （DCA）, a quantitative classification and ordination of the secondary forest communities in the Xiaolongshan National Nature Reserve was conducted, and the spatial distribution patterns of the vegetation communities were studied from the species composition and the ecological relationships of plant communities and environment, aimed to understand the succession of secondary forests in the Reserve, and give a rational environmental explanation. According to TWINSPAN, the forest communities in the Reserve were classified into 12 types. The DCA ordination graph distinctly reflected the ecological significances of the ordination axes. The horizontal axis basically reflected the variation of humidity, which increased gradually from left to right, and the vertical axis basically reflected the temperature gradient, which decreased from down to up. The succession pattern of the secondary forests was in the sequence of Populus davidiana forest → P. davidiana ＋ Betula platyphylla forest → Quercus aliena var. acuteserrata pure forest or mixed forest, with Q. aliena var. acuteserrata forest as the climax community in the process of natural succession.

关 键 词：次生林 演替过程 分类 排序 小陇山国家级自然保护区 西秦岭 

分 类 号：Q948.15[生物学—植物学]