Vertical patterns in plant diversity and their relations with environmental factors on the southern slope of the Tianshan Mountains(middle section)in Xinjiang(China)

作     者：LIU Bin 

作者机构：Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi830011China College of Resource and Environmental ScienceXinjiang UniversityUrumqi830046China College of Life ScienceXinjiang Normal UniversityUrumqi830054China University of the Chinese Academy of SciencesBeijing100049China 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2017年第14卷第4期

页      面：742-757页

核心收录：

学科分类：07[理学] 0713[理学-生态学] 

基　　金：funded by the National Natural Science Foundation of China(Grant No.31360039) 

主　　题：Species diversity Distribution pattern Plant community Soil properties Tianshan Mountains 

摘      要：The investigation of distribution patterns of species diversity is significant for successful biodiversity conservation. The spatial patterns of vegetation and different life-forms species diversity along an elevation gradient in the middle section of the southern slope of the Tianshan Mountains in Xinjiang, China were explored, using the detrended canonical correspondence analysis （DCCA） and the generalized additive model （GAM） methods based on a field survey of 53 sampling plots. In this work 158 species of seed plants were recorded, including 141 herbaceous, 14 shrub, and 2 tree species, in which the woody plants are very limited. 53 sampling plots were classified into 9 major plant communities. The results indicate that the herb communities were the most sensitive to changes in elevation gradient. The diversity indices of the community as a whole presented bimodal patterns. The peak values for the species diversities were found in the transition region between mountain steppe desert and mountain desert steppe （2,200-2,300m）, and in the alpine grassland region （2,900-3,100m）, while maximum species diversities were in the areas of intermediate environmental gradient. The main environmental factors on the distribution patterns in plant diversity were the elevation, soft water, total nitroeen, available nitrogen, organic matter, and total salt. The response tendency of the four diversity indices for the whole community to the soil environment was the same as that of the herb layers.