Evaluating soil acidification risk and its effects on biodiversity–ecosystem multifunctionality relationships in the drylands of China

作     者：Lan Du Shengchuan Tian Nan Zhao Bin Zhang Xiaohan Mu Lisong Tang Xinjun Zheng Yan Li Lan Du;Shengchuan Tian;Nan Zhao;Bin Zhang;Xiaohan Mu;Lisong Tang;Xinjun Zheng;Yan Li

作者机构：State Key Laboratory of Desert and Oasis EcologyXinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi830011XinjiangChina University of Chinese Academy of SciencesBeijing100049China Fukang Station of Desert EcologyChinese Academy of SciencesFukang831505XinjiangChina State Key Laboratory of Subtropical SilvicultureZhejiang A and F UniversityHangzhou311300ZhejiangChina 

出 版 物：《Forest Ecosystems》 (森林生态系统（英文版）)

年 卷 期：2024年第11卷第2期

页      面：162-171页

核心收录：

学科分类：0907[农学-林学] 09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：financially supported by the third xinjiang scientific expedition program (grant no.2022xjkk0901) the Strategic Priority Research Program of Chinese Academy of Sciences (No.XDA2006030102) the National Natural Sciences Foundation of China(No.42171068 and No.42330503) 

主　　题：Soil acidification risk Biodiversity Ecosystem multifunctionality Niche complementarity hypothesis Mass ratio hypothesis Vegetation quantity hypothesis 

摘      要：Background:Soil acidifcationn caused by anthropogenic activities may aft soil biochemical cydling,bidiversity,productivity,and multiple eosystem-related functions in ***,to date,such information is lacking to support this *** Based on a transect survey of 78 naturally assembled shrub communities,we caloulated acid deposition flux in Northwest China and evaluated its likely ecological ffets by testing three altemnative hypotheses,namely:.nidche complementarity,mass ratio,and vegetation quantity hypotheses Rao s quadratic entopy and community-weighted mean traits were employed to represent the complementary aspect of niche complementarity and mass ratio effects,***:We observed that in the past four decades,the concentrations of exchangeable base cations in soil in Northwest China have decreased significantly to the extent of having faced the risk of depletion,whereas changes in the calium carbonate content and pH of soil were not *** deposition primani ly increased the aboweground biomass and shrub density in shrublands but had no sigmificant effect on shrub richness and ecasystem multifunctionality(EMF),indicating that acid deposition had positive but weak ecological effects on dryland *** wd ghted mean of functional traits(representing the mass ratio hypothesis)correlated negatively with EMF,whereas both Rao s quadratic entropy(representing the niche complementarity hypothesis)and aboveground biomass(representing the vegetation quantity hypothesis)correlated positively but insignifcantly with *** biodiversity-EMF relationships highlight the fragility and instability of drylands relative to forest ***:The findings from this study serve as important reference points to understand the ris of soil acidification in arid regions and its impacts on biodiversity-EMF relationships.