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

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

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Discerning vulnerability differences among dif-ferent aged trees to drought-driven growth decline or to mor-tality is critical to implement age-specific countermeasures for forest management in water-limited areas.An important species for afforestation in dry environments of northern China,Mongolian pine(Pinus sylvestris var.mongolica Litv.)has recently exhibited growth decline and dieback on many sites,particularly pronounced in old-growth planta-tions.However,changes in response to drought stress by this species with age as well as the underlying mechanisms are poorly understood.In this study,tree-ring data and remotely sensed vegetation data were combined to investigate varia-tions 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 plantations.In addition,all meas-ured growth-related metrics were strongly correlated with the self-calibrating Palmer drought severity index during the growing season in the older plantation.Sensitivity of growth to drought of the older plantation might be attributed to more severe hydraulic limitations,as reflected by their lower sap-wood-and leaf-specific hydraulic conductivities.Our study presents a comprehensive view on changes of growth with age by integrating multiple methods and provides an expla-nation from the perspective of plant hydraulics for growth decline with age.The results indicate that old-growth Mon-golian pine plantations in water-limited environments may face increased growth declines under the context of climate warming and drying.

Tree ageDrought stressMongolian pine plantationTree ringsRemote sensingPlant hydraulics

Mingyong Li、Leilei Yang、Yu Cao、Dedong Wu、Guangyou Hao、Tao Xu

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CAS Key Laboratory of Forest Ecology and Management,Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,People's Republic of China

Key Laboratory of Terrestrial Ecosystem Carbon Neutrality,Liaoning Province,Shenyang 110016,People's Republic of China

Daqinggou Ecological Research Station,Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,People's Republic of China

University of Chinese Academy of Sciences,Beijing 100049,People's Republic of China

Research Institute of Sand Control and Utilization,Liaoning Province,Fuxin 123000,People's Republic of China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Key R & D Program of ChinaNational Key R & D Program of ChinaKey Research Program of Frontier Sciences of the Chinese Academy of Sciences

319010933222010301032192431317220132020YFA06081002022YFF1302505ZDBS-LY-DQC019

2024

10.1007/s11676-023-01677-4

林业研究(英文版)
东北林业大学,中国生态学学会

林业研究(英文版)

CSTPCDEI
影响因子：0.365
ISSN：1007-662X
年,卷(期)：2024.35(2)
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