Climate–growth relationship for different directions of Pinus pumila radial growth at the treeline of northern Daxing’an Mountains, China

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Climate–growth relationship for different directions of Pinus pumila radial growth at the treeline of northern Daxing’an Mountains, China
	Yang, Jinwen; Zhao, Huiying; Zhang, Yuandong; Li, Zongshan; Wang, Xiaochun
刊名	TREES-STRUCTURE AND FUNCTION
	2018-02-01
卷号	32 期号:1 页码:311-322
关键词	Treeline Tree rings Pinus pumila Freeze-thaw Eccentric shrub Compression wood
ISSN号	0931-1890
文献子类	Article
英文摘要	Pinus pumila radial growth in differing radii directions' response to climatic factors is inconsistent. The effects of freeze-thaw events on growth differ between spring and autumn. Pinus pumila is a crucial shrub species of sub-alpine treelines in northeast Daxing'an Mountains, China, but the growth-climate relationship for this eccentric shrub is not well understood. A total of 15 disks near the trunk base of individual Pinus pumila were collected at the treeline of Xiaobai Mountain, China. We investigated the growth-climate relationships in four reaction directions (A and B: left and right perpendicular radii; C: opposite radius to compression wood; D: compression wood radius). Results indicated that the shrub-ring width at the D direction was the widest (0.70 +/- 0.14 mm/a) of the four directions, while the opposite direction (C) is narrowest (0.43 +/- 0.07 mm/a). Water availability in June was the major limiting factor for P. pumila growth in the A and B directions. However, the radial growth in the C direction was mainly affected by mean and maximum temperatures in June, and growth in the D direction positively correlated with mean temperature in the current February and the previous October and minimum temperature in the previous November. In addition, the radial growth at all four directions negatively correlated with the sunshine hours in June of the current year, which could be related to the increase of soil drought and respiration caused by higher temperatures. Radial growth at the A, B, and C directions negatively correlated with the freeze-thaw magnitude and frequency in May, which may cause the frost damage in shrub leaves and roots. Our findings suggested that the eccentric shrub growth at the perpendicular radii may not contain the best climate signals, while the growth at the compression wood direction seems to be of normal use in dendroclimatology.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/40725]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Yang, Jinwen,Zhao, Huiying,Zhang, Yuandong,et al. Climate–growth relationship for different directions of Pinus pumila radial growth at the treeline of northern Daxing’an Mountains, China[J]. TREES-STRUCTURE AND FUNCTION,2018,32(1):311-322.
APA	Yang, Jinwen,Zhao, Huiying,Zhang, Yuandong,Li, Zongshan,&Wang, Xiaochun.(2018).Climate–growth relationship for different directions of Pinus pumila radial growth at the treeline of northern Daxing’an Mountains, China.TREES-STRUCTURE AND FUNCTION,32(1),311-322.
MLA	Yang, Jinwen,et al."Climate–growth relationship for different directions of Pinus pumila radial growth at the treeline of northern Daxing’an Mountains, China".TREES-STRUCTURE AND FUNCTION 32.1(2018):311-322.