Abstract:

An idea of plant functional types (PFTs) classification is brought forward based on the topographical pattern of plants, and a case study at Daloling region, lying in the northern part of Chinese subtropical zone, is presented. By means of extensive field study of the mountain forests, the quantitative attributes of the major 55 evergreen broadleaved tree species in the communities located at various topographical positions were acquired. The detrended canerical corre spondence analysis (DCCA) method was used to analyze: 1) The correlationships among the habitat temperature, moisture and illumination conditions and the 6 topographical attributes as elevation, mountain aspect, slope shape, slope position, slope direction and slope gradient of the habitat. 2) The diverse patterns of 55 species on the multidimensional topographical gradients. The scores of ordination were then used for a two way indicator species analysis (TWINSPAN) to the species. According to the results of previous analyses, the 55 evergreen broadleaved tree species at Dalaoling were classified into 10 PFTs. A discussion about the validity and limits of this PFTs accessing approach were given in the end. 

基于植物分布地形格局的植物功能型划分研究
沈泽昊1 张新时2

（1. 北京大学城市与环境科学系，北京100871；2.  中国科学院植物研究所，北京100093）

摘要：提出基于植物分布的地形格局划分植物功能型 (PFTs)的思路 ,并以位于中国亚热带北部的大老岭地区为研究区域进行案例研究。通过大量的森林群落调查获得该地区 5 5种主要的常绿阔叶树在不同地形部位群落中的数量特征 ;采用去势典范对应分析 (DCCA)方法 :1)海拔、坡面、坡形、坡位、坡向、坡度等 6个地形特征指标与群落生境的热量、水分和光照条件的关系 ;2 ) 5 5种植物在多维地形梯度上的分异格局。然后利用排序得分对物种进行二元指示种 (TWINSPAN)分类。依据上述分析 ,将大老岭的常绿阔叶树种划分成 10个PFTs。讨论了这种PFTs划分途径的有效性和局限。
关键词： 大老岭地区；常绿阔叶树种；地形格局；功能型

Key words: Dalaoling, evergreen broadleaved tree species, topographical pattern, functional types