Variation in plant diversity and dominance across dune fixation stages in the Chinese steppe zone
作者机构：State Key Laboratory of Vegetation and Environmental ChangeInstitute of BotanyChinese Academy of SciencesBeijing 100093China Graduate University of Chinese Academy of SciencesYuquanluBeijing 100049China Kangbashi New District Bureau of Parks and WoodsOrdos 017000China Inner Mongolia Research Center for PratacultureChinese Academy of SciencesBeijing 100093China
出 版 物：《Journal of Plant Ecology》 (植物生态学报（英文版）)
年 卷 期：2012年第5卷第3期
页 面：313-319页
核心收录：
学科分类：0710[理学-生物学] 071001[理学-植物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 0901[农学-作物学] 0902[农学-园艺学] 0713[理学-生态学]
基 金：Chinese Academy of Sciences(KZCX2-YW-431-04) National Natural Science Foundation of China(30821062) VEWALNE(VEgetation-WAter Long-term Networked Experiment in Chinese Steppe zone)project
主 题：PFT diversity semi-arid area vegetation covariation species replacement
摘 要：Aims Our aim was to study how diversity and dominance of plant species and plant functional types(PFTs)change and covary across three dune fixation stages in the Chinese steppe *** In the Chinese steppe zone,we measured coverage,mean height and density of each plant species in three types of dunes(mobile,semi-fixed and fixed dunes)in four sites(Mu Us,Otindag,Hulunbeir and Horqin).Plant species were grouped into 24 PFTs according to their lifespan,photosynthetic pathway,reproductive mode and life *** of each plant species and PFT were determined,and species diversity and PFT diversity were quantified using Shannon–Wiener *** Findings PFT diversity was positively related to plant species diversity in each dune stage,but PFT diversity increased more with increasing plant species diversity in the mobile and semi-fixed dunes than in the fixed *** fixation stage explained 87.2%of the variation in plant species diversity and 84.8%of the variation in PFT *** species and PFTs differed among the three dune fixation stages;the more fixed the dunes were,the more perennial,shrubby,clonal and C3 species ***,in mobile dunes annual C4 non-clonal herbs were the most dominant,and in semi-fixed and fixed dunes perennial C3 clonal shrubs were most dominant.
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