Response of Biomass Spatial Pattern of Alpine Vegetation to Climate Change in Permafrost Region of the Qinghai-Tibet Plateau,China

作     者：ZHANG Yu WANG Genxu WANG Yibo ZHANG Yu1,WANG Genxu2,WANG Yibo1 1 College of Resources & Environment,Lanzhou University,Lanzhou 730000,China 2 Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610041,China

作者机构：College of Resources & EnvironmentLanzhou UniversityLanzhou 730000China Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China 

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

年 卷 期：2010年第7卷第4期

页      面：301-314页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 07[理学] 0303[法学-社会学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0705[理学-地理学] 0815[工学-水利工程] 0816[工学-测绘科学与技术] 0706[理学-大气科学] 0813[工学-建筑学] 0704[理学-天文学] 0833[工学-城乡规划学] 0713[理学-生态学] 0834[工学-风景园林学（可授工学、农学学位）] 

基　　金：funded by the National Basic Research Program (also called 973 Program) (Grant No.2007CB411504) the National Natural Science Foundation of China (Grant No.40925002 and No.40730634) 

主　　题：Permafrost change Qinghai-TibetanPlateau Alpine ecosystem Grassland biomass Climate change Response model 

摘      要：Alpine ecosystems in permafrost region are extremely sensitive to climate *** determine spatial pattern variations in alpine meadow and alpine steppe biomass dynamics in the permafrost region of the Qinghai-Tibet Plateau,China,calibrated with historical datasets of above-ground biomass production within the permafrost region s two main ecosystems,an ecosystem-biomass model was developed by employing empirical spatialdistribution models of the study region s precipitation,air temperature and soil *** model was then successfully used to simulate the spatio-temporal variations in annual alpine ecosystem biomass production under climate *** a 0.44°C decade-1 rise in air temperature,the model predicted that the biomasses of alpine meadow and alpine steppe remained roughly the same if annual precipitation increased by 8 mm per decade-1,but the biomasses were decreased by 2.7% and 2.4%,respectively if precipitation was *** a 2.2°C decade-1 rise in air temperature coupled with a 12 mm decade-1 rise in precipitation,the model predicted that the biomass of alpine meadow was unchanged or slightly increased,while that of alpine steppe was increased by 5.2%.However,in the absence of any rise in precipitation,the model predicted 6.8% and 4.6% declines in alpine meadow and alpine steppe biomasses,*** response of alpine steppe biomass to the rising air temperatures and precipitation was significantly lesser and greater,respectively than that of alpine meadow biomass.A better understanding of the difference in alpine ecosystem biomass production under climate change is greatly significant with respect to the influence of climate change on the carbon and water cycles in the permafrost regions of the Qinghai-Tibet Plateau.