Old Pinus massoniana forests benefit more from recent rapid warming in humid subtropical areas of central-southern China  

作　　者：Wenxin Li Liangjun Zhu Lianhua Zhu Mengdan Jing Censhi Qian Yu Zhu Paolo Cherubini 

机构地区：[1]College of Life Science and Technology,Central South University of Forestry and Technology,Changsha 410004,People’s Republic of China [2]Swiss Federal Institute for Forest,Snow and Landscape Research WSL,8903 Birmensdorf,Switzerland [3]Department of Forest and Conservation Sciences,Faculty of Forestry,University of British Columbia,2004-2424 Main Mall,Vancouver,BC V6T 1Z4,Canada

出　　处：《Journal of Forestry Research》2024年第5期155-170,共16页林业研究（英文版）

基　　金：funded by the National Natural Science Foundation of China(42107476,31901241);the China Postdoctoral Science Foundation(2020M682600);the China Postdoctoral International Exchange Fellowship Program(PC2021099);the Natural Science Foundation of Hunan Province(2021JJ41075).

摘　　要：Trees progress through various growth stages,each marked by specific responses and adaptation strate-gies to environmental conditions.Despite the importance of age-related growth responses on overall forest health and management policies,limited knowledge exists regarding age-related effects on dendroclimatic relationships in key subtropical tree species.In this study,we employed a den-drochronological method to examine the impact of rapid warming on growth dynamics and climatic sensitivity of young(40–60 years)and old(100–180 years)Pinus mas-soniana forests across six sites in central-southern China.The normalized log basal area increment of trees in both age groups increased significantly following rapid warming in 1984.Trees in young forests further showed a distinct growth decline during a prolonged severe drought(2004–2013),whereas those in old forests maintained growth increases.Tree growth was more strongly influenced by temperature than by moisture,particularly in old forests.Spring tem-peratures strongly and positively impacted the growth of old trees but had a weaker effect on young ones.Old forests had a significantly lower resistance to extreme drought but faster recovery compared to young forests.The“divergence problem”was more pronounced in younger forests due to their heightened sensitivity to warming-induced drought and heat stress.With ongoing warming,young forests also may initially experience a growth decline due to their heightened sensitivity to winter drought.Our findings underscore the importance of considering age-dependent changes in forest/tree growth response to warming in subtropical forest man-agement,particularly in the context of achieving“Carbon Peak&Carbon Neutrality”goals in China.

关 键 词：Tree rings Pinus massoniana Age effects Drought resilience Subtropical forests Rapid warming 

分 类 号：S791.248[农业科学—林木遗传育种]