摘要
在广东石坑崆对植物生活型谱的垂直分布进行了研究.从海拔300-1 900 m,每升高100 m设置一条水平样带,共调查了17条样带,样地面积20 400 m2.运用相关分析和除趋势对应分析(DCA)研究森林植物生活型谱的垂直变化模式.结果表明:(1)乔木、灌木、藤本植物、常绿植物、高位芽植物以及地面芽植物皆表现出随海拔的增加物种数逐渐减少的趋势(P<0.05);(2)高位芽植物在各样带均占绝对优势(75%以上).海拔300-1 700 m,中高位芽植物稍优于小高位芽植物、矮高位芽植物和藤本高位芽植物;(3)除趋势对应分析显示地上芽植物和藤本高位芽植物沿海拔梯度分布的差异较大.研究植物生活型谱海拔梯度格局有助于揭示森林群落的环境梯度变化规律,为保护垂直带上森林生态系统的整体性提供科学依据.
Variations in plant hfe-form spectra along an altitudinal gradient were investigated in Shikengkong, Guangdong province using gradient sampling method. A horizontal transect （10 m × 120 m） was placed at 100 m altitudinal interval from an elevation of 300-1 900 m a. s. 1. in Nanling National Nature Reserve and its adjacent areas. Correlation analysis and detrended correspondence analysis （DCA） were used to detect altitudinal patterns of life-form and its environmental correlates. The results were as follows： 1 ） Life-form in terms of tree, shrub, herbage, evergreen plants, phanerophytes and hemicryptophytes, respectively, showed significantly negative correlations with altitude （ P 〈 0. 05） ; 2） Phanerophytes was dominant in each transects （ 〉 75 % ）, and the proportion of mesophanerophyte were larger than microphanerophytes, microphanerophytes, hnopuanerophytes from 300-1 700 m a. s. 1. ; 3 ） DCA of raunkiaer＇ s life-form indicated chamaephytes and lianas changed markedly along an altitudinal gradient. Variations in plant life-form spectra along an altitudinal gradient will help understand the rule of forest community dynamics along environmental gradient. This research will provide scientific basics for forest ecosystem conservation.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2007年第2期78-82,共5页
Journal of South China Agricultural University
基金
广东省科技计划项目(2002C20703)
中国香港特别行政区嘉道理农场暨植物园资助项目(4400-G06005)
关键词
生活型谱
海拔梯度
森林群落
南岭国家级自然保护区
life-form spectra
altitudinal gradient
forest community
Nanling National Nature Reserve
作者简介
张璐（1973-），女，讲师，博士，E—mail：zhanglu@scau．edu．cn
