Water sources for typical desert vegetation in the Ebinur Lake basin

作     者：HAO Shuai LI Fadong 郝帅;李发东

作者机构：College of Geographic Science and TourismXinjiang Normal UniversityUrumqi 830054China Key Laboratory of Xinjiang Uygur Autonomous RegionXinjiang Laboratory of Lake Environment and Resources in Arid AreaUrumqi 830054China Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China College of Resource and EnvironmentUniversity of Chinese Academy of SciencesBeijing 100190China 

出 版 物：《Journal of Geographical Sciences》 (地理学报（英文版）)

年 卷 期：2022年第32卷第6期

页      面：1103-1118页

核心收录：

学科分类：07[理学] 0713[理学-生态学] 

基　　金：Natural Science Foundation of Xinjiang Uygur Autonomous Region,No.2021D01A118 National Natural Science Foundation of China,No.U1803244 Open Project of Xinjiang Laboratory of Lake Environment and Resources in Arid Area,No.XJNUSYS2019B18 

主　　题：desert vegetation water use stable isotopes of hydrogen and oxygen Ebinur Lake basin 

摘      要：In arid and semi-arid environments,desert vegetation plays an important role in preventing soil erosion by wind and helps maintain the stability of desert and oasis *** types of typical desert vegetation,namely Populus euphratica,Haloxylon ammodendron,Nitraria sibirica,and Halostachs caspica,corresponding to different habitats(i.e.,river bank,sand dune,desert,and salt marsh)were chosen as the model vegetation in this ***δ^(2)H andδ^(18)O for rainwater,soil water,and plant water were applied to identify the water sources and quantify the proportions of different water sources used over the entire plant growth period(from March to October).The results showed that the precipitationδ^(2)H andδ^(18)O in the Ebinur Lake basin varied from-142.5‰to-0.6‰and from-20.16‰to 1.20‰,*** largestδ^(2)H andδ^(18)O values occurred in summer and the smallest in *** soil waterδ^(2)H andδ^(18)O of the four habitats decreased gradually with increasing ***δ^(2)H andδ^(18)O values of water extracted from the stems of the four plants had similar variation trends,that is,the maximum was observed in spring and the minimum in *** the four plants,*** had the highest stable isotopic values in the stem water,followed by ***,***,and *** water sources and utilization ratios of desert vegetation varied across different growth *** the growing period,*** mainly used groundwater,whereas the water source proportions used by *** varied greatly throughout the growing *** spring,plants mainly relied on surface soil water,with a contribution rate of 80%-94%.However,in summer,the proportion of deep soil water used was 31%-36%;and in autumn,the proportion of middle soil water used was 33%-36%.*** mainly relied on topsoil water in spring and autumn,and the proportion of soil water in the middle layer slightly increased to 20%-36%in *** mainly used intermediate so