Aging Mongolian pine plantations face high risks of drought-induced growth decline:evidence from both individual tree and forest stand measurements

作     者：Mingyong Li Leilei Yang Yu Cao Dedong Wu Guangyou Hao Mingyong Li;Leilei Yang;Yu Cao;Dedong Wu;Guangyou Hao;Tao Xu

作者机构：CAS Key Laboratory of Forest Ecology and ManagementInstitute of Applied EcologyChinese Academy of SciencesShenyang 110016People’s Republic of China Key Laboratory of Terrestrial Ecosystem Carbon NeutralityLiaoning ProvinceShenyang 110016People’s Republic of China Daqinggou Ecological Research StationInstitute of Applied EcologyChinese Academy of SciencesShenyang 110016People’s Republic of China University of Chinese Academy of SciencesBeijing 100049People’s Republic of China Research Institute of Sand Control and UtilizationLiaoning ProvinceFuxin 123000People’s Republic of China 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2024年第35卷第2期

页      面：109-120页

核心收录：

学科分类：0907[农学-林学] 08[工学] 0829[工学-林业工程] 09[农学] 

基　　金：financially supported by the National Natural Science Foundation of China(31901093,32220103010,32192431,31722013) National Key R&D Program of China(2020YFA0608100,2022YFF1302505) the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences(ZDBS-LY-DQC019) 

主　　题：Tree age Drought stress Mongolian pine plantation Tree rings Remote sensing Plant hydraulics 

摘      要：Discerning vulnerability differences among different aged trees to drought-driven growth decline or to mortality is critical to implement age-specific countermeasures for forest management in water-limited *** important species for afforestation in dry environments of northern China,Mongolian pine(Pinus sylvestris *** Litv.)has recently exhibited growth decline and dieback on many sites,particularly pronounced in old-growth ***,changes in response to drought stress by this species with age as well as the underlying mechanisms are poorly *** this study,tree-ring data and remotely sensed vegetation data were combined to investigate variations in growth at individual tree and stand scales for young(9-13 years)and aging(35-52 years)plantations of Mongolian pine in a water-limited area of northern China.A recent decline in tree-ring width in the older plantation also had lower values in satellited-derived normalized difference vegetation indices and normalized difference water indices relative to the younger *** addition,all measured growth-related metrics were strongly correlated with the self-calibrating Palmer drought severity index during the growing season in the older *** of growth to drought of the older plantation might be attributed to more severe hydraulic limitations,as reflected by their lower sapwood-and leaf-specific hydraulic *** study presents a comprehensive view on changes of growth with age by integrating multiple methods and provides an explanation from the perspective of plant hydraulics for growth decline with *** results indicate that old-growth Mongolian pine plantations in water-limited environments may face increased growth declines under the context of climate warming and drying.