气候变化领域集成服务门户(CCPortal): Low rainfall-induced shift in leaf trait relationship within species along a semi-arid sandy land transect in northern China

CCPortal

DOI	10.1111/j.1438-8677.2010.00321.x
	Low rainfall-induced shift in leaf trait relationship within species along a semi-arid sandy land transect in northern China
	Wei, H.; Wu, B.; Yang, W.; Luo, T.
通讯作者	Luo, T (通讯作者)
发表日期	2011
ISSN	1435-8603
EISSN	1438-8677
起始页码	85
结束页码	92
卷号	13 期号:1
英文摘要	It is unclear whether the shift in leaf traits between species of high- and low-rainfall sites is caused by low rainfall or by species replacement, because leaf traits vary substantially among species and sites. Our objective was to test if the within-species relationship between specific leaf area (SLA) and leaf N concentration (N-mass) shifts across a rainfall gradient in the semi-arid sandy lands of northern China. Data for SLA and N-mass of dominant species and related canopy and soil variables were collected from 33 plots along a rainfall transect (270-390 mm) having similar temperatures in the Mu Us, Inner Mongolia. We further investigated the generality of Mu Us data using 12 additional plots in the southeastern Qaidam Basin, Qinghai. Artemisia ordosica is a widespread species in both regions. Across and within species, the positive SLA-N-mass relationship shifted between two plant groups in the lowest rainfall plots (270 mm) and other higher rainfall plots (320-390 mm), which was confirmed by additional data from Qinghai. For A. ordosica populations, leaf area index (LAI) decreased and N-mass increased with decreasing rainfall, while the foliage N pool and SLA varied little. Rainfall was the limiting factor that determined variations in N-mass and LAI. Accordingly, N-mass/SLA ratios continually increased with decreasing LAI along the rainfall gradient (r = -0.76, P < 0.001). Results indicate a low rainfall-induced shift in the SLA-N-mass relationship associated with changes in LAI and foliage N pool, suggesting a link between leaf characteristics and ecosystem function.
关键词	CARBON-ISOTOPE DISCRIMINATION DRY MASS NITROGEN AREA AUSTRALIA GRADIENT LEAVES PHOTOSYNTHESIS THICKNESS DENSITY
英文关键词	Arid land plants; leaf nitrogen; rainfall gradient; specific leaf area; strategy shift; water use efficiency
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:000285206700012
来源期刊	PLANT BIOLOGY
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/257909
推荐引用方式 GB/T 7714	Wei, H.,Wu, B.,Yang, W.,et al. Low rainfall-induced shift in leaf trait relationship within species along a semi-arid sandy land transect in northern China[J]. 中国科学院青藏高原研究所,2011,13(1).
APA	Wei, H.,Wu, B.,Yang, W.,&Luo, T..(2011).Low rainfall-induced shift in leaf trait relationship within species along a semi-arid sandy land transect in northern China.PLANT BIOLOGY,13(1).
MLA	Wei, H.,et al."Low rainfall-induced shift in leaf trait relationship within species along a semi-arid sandy land transect in northern China".PLANT BIOLOGY 13.1(2011).