Leaf stoichiometry of Leontopodium lentopodioides at high altitudes on the northeastern Qinghai-Tibetan Plateau,China

作     者：WANG Hairu SU Haohai Asim BISWAS CAO Jianjun WANG Hairu;SU Haohai;Asim BISWAS;CAO Jianjun

作者机构：College of Geography and Environmental ScienceNorthwest Normal UniversityLanzhou 730070China School of Environmental SciencesUniversity of Guelph50 Stone Road EastGuelphOntario N1G 2W1Canada Key Laboratory of Eco-Functional Polymer Materials of the Ministry of EducationNorthwest Normal UniversityLanzhou 730070China Key Laboratory of Resource Environment and Sustainable Development of OasisCollege of Geography and Environmental ScienceNorthwest Normal UniversityLanzhou 730070China 

出 版 物：《Journal of Arid Land》 (干旱区科学（英文版）)

年 卷 期：2022年第14卷第10期

页      面：1124-1137页

核心收录：

学科分类：07[理学] 0713[理学-生态学] 

基　　金：the Science and Technology Planning Project of Gansu Province,China(18JR4RA002) the Qilian Mountains Eco-Environment Research Center in Gansu Province,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences(QLS202002) 

主　　题：alpine area environmental changes leaf elements nutrient limitation Qilian Mountains 

摘      要：Altitude affects leaf stoichiometry by regulating temperature and precipitation,and influencing soil properties in mountain *** carbon concentration(C),leaf nitrogen concentration(N),leaf phosphorous concentration(P),and their stoichiometric ratios of Leontopodium lentopodioides(Willd.)Beauv.,a widespread species in degraded grasslands,were investigated to explore its response and adaptation strategy to environmental changes along four altitude gradients(2500,3000,3500,and 3800 m a.s.l.)on the northeastern Qinghai-Tibetan Plateau(QTP),*** leaf C significantly varied but without any clear trend with increasing *** N showed an increasing trend,and leaf P showed a little change with increasing altitude,with a lower value of leaf P at 3500 m than those at other ***,leaf C:P and N:P exhibited a little change with increasing altitude,which both had greater values at 3500 m than those at other ***,leaf C:N exhibited a decreasing trend with increasing *** NH^(+)_(4)-N,soil pH,soil total phosphorus(STP),mean annual temperature(MAT),and mean annual precipitation(MAP)were identified as the main factors driving the variations in leaf stoichiometry of *** across all altitudes,with NH^(+)_(4)-N alone accounting for 50.8%of its total ***,leaf C and N were mainly controlled by MAT,soil pH,and NH^(+)_(4)-N,while leaf P by MAP and *** the study area,it seems that the growth of *** may be mainly limited by *** results could help to strengthen our understanding of the plasticity of plant growth to environmental changes and provide new information on global grassland management and restoration.