气候变化领域集成服务门户(CCPortal): The physiological constraints of alpine treeline in Qilian Mountains

CCPortal

DOI	10.1016/j.foreco.2021.119761
	The physiological constraints of alpine treeline in Qilian Mountains
	Feng, Xiangyan; Lin, Pengfei; Zhao, Wenzhi
通讯作者	Zhao, WZ (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China.
发表日期	2022
ISSN	0378-1127
EISSN	1872-7042
卷号	503
英文摘要	The dynamics of the alpine forest boundary and the mechanisms behind have long been the ecological research hotspots. Growing season temperature (T-gs) decreases along with altitude gradients limiting alpine treeline has become the widely accepted mechanism among various theories. However, the physiological process amid T-gs limitation of the alpine treeline is still not well understood. Here, we measured leaf hydraulic conductance (K-l), stem hydraulic conductance (K-s), leaf and stem anatomic structures, and leaf saturated photosynthetic rate (A(sat)) of 11 tree and shrub species naturally distributed along the altitude gradients towards the typical alpine treeline in the north face of Qilian Mountains. We found, irrespective of interspecies or intraspecies, K-l and K-s both significantly decreased along the altitude gradients, and the species distributed in the high altitude with rather low K-l and K-s. The decrease of leaf midvein and stem xylem vessel diameter were the anatomical cause of the decreases of K-l and K-s. Further analysis proved that the decreased T-gs, not growing season precipitation (P-gs), was closely coordinated with the decrease of K-l and K-s along altitude gradients. The path analysis showed that the decreased T-gs, K-l, and K-s along the altitude gradients negatively influenced A(sat), and thereby limits the species survival in high altitudes. The findings proposed the physiological constraints of the alpine forest treeline and provided the physiological insights for alpine forest management and conservation.
关键词	LEAF HYDRAULIC CAPACITY COLD-ACCLIMATION LOW-TEMPERATURE PHOTOSYNTHESIS CLIMATE NORTHERN STRESS GROWTH SHIFTS VULNERABILITY
英文关键词	Alpine treeline; Hydraulic; Physiological; Altitude; Plant distribution
语种	英语
WOS研究方向	Forestry
WOS类目	Forestry
WOS记录号	WOS:000710248700009
来源期刊	FOREST ECOLOGY AND MANAGEMENT
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253874
作者单位	[Feng, Xiangyan; Lin, Pengfei; Zhao, Wenzhi] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China; [Feng, Xiangyan; Lin, Pengfei; Zhao, Wenzhi] Chinese Ecosyst Res Network, Linze Inland River Basin Res Stn, Lanzhou 730000, Peoples R China; [Feng, Xiangyan] Univ Chinese Acad Sci, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Feng, Xiangyan,Lin, Pengfei,Zhao, Wenzhi. The physiological constraints of alpine treeline in Qilian Mountains[J]. 中国科学院西北生态环境资源研究院,2022,503.
APA	Feng, Xiangyan,Lin, Pengfei,&Zhao, Wenzhi.(2022).The physiological constraints of alpine treeline in Qilian Mountains.FOREST ECOLOGY AND MANAGEMENT,503.
MLA	Feng, Xiangyan,et al."The physiological constraints of alpine treeline in Qilian Mountains".FOREST ECOLOGY AND MANAGEMENT 503(2022).