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Chinese Journal of Applied Ecology ›› 2019, Vol. 30 ›› Issue (3): 805-813.doi: 10.13287/j.1001-9332.201903.003

• Research paper • Previous Articles     Next Articles

Variations of mean sensitivity of tree rings in Asia and their influencing factors

ZHENG Zhuang-peng1,2, ZHAO Si-yuan3, ZHOU Fei-fei1,2, HE Jin-fu4, HU Shan-bin4, DONG Zhi-peng1,2, CHEN Shi-yin1,2, FANG Ke-yan1,2*   

  1. 1College of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China;
    2Cultuvation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China;
    3Academy of Forest Inventory and Planning, State Fore-stry Administration, Beijing 100714, China;
    4Management and Protection Bureau of Yunnan Yunlin Provincial Nature Reserve, Nujiang 673100, Yunnan, China
  • Received:2018-09-14 Online:2019-03-20 Published:2019-03-20
  • Supported by:
    This work was supported by the Strategic Priority Research Program of Chinese Academy of Sciences (XDB26020000), the Excellent Youth Fund of the National Science Foundation of China (41822101), the National Youth Talent Support Program of China (Ten Thousand People Plan), the Youth Talent Support Program of the Non-profit Project of Fujian Province (2015R1101029-8), and the Innovation Team Project of Fujian Normal University (IRTL1705).

Abstract: Mean sensitivity (MS) of tree ring is a key index representing the sensitivity of tree rings to climate. Understanding the variation of MS and its influencing factors at a large area is helpful to understand the interaction between tree growth and climate. We used 573 tree-ring width chronologies in Asia from the International Tree Ring Date Bank (ITRDB) to examine the variation of tree-ring sensitivity and potential influencing factors. The results showed that the MS of trees was high in the arid regions and cold regions. Precipitation was more important than temperature in diriving MS. Consistent with the pattern of up-down-up for precipitation, MS showed a down-up-down fluctuation with increasing altitude, indicating that precipitation affected by altitude was a key climate factor for the MS. MS had great difference due to different physiological traits among tree species. Light-adapted species, such as Juniperus przewalskii and Pinus gerardiana, had high MS due to drought tole-rance. Shade-adapted species, such as Picea and Abies, had low MS. Old trees may have high MS.

Key words: sensitivity, altitude, sun-adapted species, shade-adapted species, tree ring