气候变化领域集成服务门户(CCPortal): Moisture mediates temperature-growth couplings of high-elevation shrubs in the Tibetan plateau

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DOI	10.1007/s00468-021-02204-w
	Moisture mediates temperature-growth couplings of high-elevation shrubs in the Tibetan plateau
	Han, Yang; Wang, Yafeng; Liu, Bo; Huang, Ru; Julio Camarero, J.
通讯作者	Wang, YF (通讯作者)
发表日期	2022
ISSN	0931-1890
EISSN	1432-2285
起始页码	273
结束页码	281
卷号	36 期号:1
英文摘要	Key message Radial growth of high-elevation shrubs shows the high sensitivity to climate in dry regions, providing new evidence for drought-mediated dynamics of alpine woody plants. In mountains, shrubs forming their uppermost distributional limits (shrubline) are highly sensitive to increasing cold limitations upwards. However, the constraints imposed by a shorter growing season due to lower temperatures upslope could interact with drought stress in mountainous regions. Here, we aim to investigate that question by comparing radial growth patterns of shrubs in wet (forest region of Nangqian County, BZ hereafter) vs. dry (forest region of Leiwuqi County, LWQ hereafter) regions located on the eastern Tibetan plateau. Considering the climate trend in this area towards warmer and drier conditions, we hypothesize that growth of high-elevation shrubs will be mainly limited by low summer temperatures under sufficient soil moisture. To test this hypothesis, we collected ring-width data from 123 alpine shrubs (Salix oritrepha Schneid.) along an altitudinal gradient from 4200 to 4600 m a.s.l. Dendroecological analyses showed that shrub growth was positively related to mean June or July temperature during the past decades in both wet (BZ) and dry (LWQ) regions regardless of site elevation. By contrast, correlations between shrub growth and seasonal precipitation were not significant. Shrub growth trends were positive before 2010 but turned negative afterwards. Overall, radial growth of shrubs along the altitudinal gradients up to the shrubline could shift from being temperature to moisture limited if warming-induced drought stress intensifies.
关键词	CLIMATE-CHANGE RADIAL-GROWTH DWARF SHRUBS TREE GROWTH VEGETATION ALTITUDE SHIFTS TUNDRA LINE
英文关键词	Alpine shrub; Climate change; Dendroecology; Drought; Secondary growth
语种	英语
WOS研究方向	Forestry
WOS类目	Forestry
WOS记录号	WOS:000693496800002
来源期刊	TREES-STRUCTURE AND FUNCTION
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260674
推荐引用方式 GB/T 7714	Han, Yang,Wang, Yafeng,Liu, Bo,et al. Moisture mediates temperature-growth couplings of high-elevation shrubs in the Tibetan plateau[J]. 中国科学院青藏高原研究所,2022,36(1).
APA	Han, Yang,Wang, Yafeng,Liu, Bo,Huang, Ru,&Julio Camarero, J..(2022).Moisture mediates temperature-growth couplings of high-elevation shrubs in the Tibetan plateau.TREES-STRUCTURE AND FUNCTION,36(1).
MLA	Han, Yang,et al."Moisture mediates temperature-growth couplings of high-elevation shrubs in the Tibetan plateau".TREES-STRUCTURE AND FUNCTION 36.1(2022).