Research progress on physiological processes-based tree-ring width models of Vaganov-Shashkin(VS)and VS-Lite
The Vaganov-Shashkin(VS)and VS-Lite models are the most widely used physiological processes-based models of tree-ring width.Both models can reveal the intrinsic response mechanism between tree-ring width and external climate factors.The VS model is commonly applied in climate reconstruction,wood phenology predic-tion,and the simulation of cambial activity,while the VS-Lite model is primarily applied in forecasting growth trends of forest.We collected papers related to the VS and VS-Lite models published between 2005 and 2023,and reviewed the fundamental principles,parameter settings,and historical development of both models,as well as the their applications in research areas of dendroclimatology,xylem phenology,and forest ecology.Then,we summa-rized the current issues with the models and proposed future research directions.To increase confidence in the simu-lation results,it is essential to optimize the parameter adjustment method of the models,consider the impact of mul-tiple environmental factors on the physiological processes of trees,and strengthen the comparative study of the VS and VS-Lite model with other vegetation ecological models.
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