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DOI	10.1016/j.ecolind.2019.105890
	Dramatic altitudinal variations in leaf mass per area of two plant growth forms at extreme heights
	Zhang, Lin; Yang, Liu; Shen, Wei
通讯作者	Zhang, L (通讯作者)
发表日期	2020
ISSN	1470-160X
EISSN	1872-7034
卷号	110
英文摘要	Knowledge of how leaf mass per area (LMA) and its components, leaf thickness (LT) and leaf density (LD), and related leaf traits may vary with altitude concerning different plant life forms at extremely high altitudes is scarce. We measured LMA, leaf nitrogen (N-mass), LT, LD, and the related anatomical characteristics of an evergreen shrub (Rhododendron aganniphum var. schizopeplum, RAS) and a wintergreen herb (Bergenia purpurascen, BP) along an altitudinal gradient above 4200 m a.s.l. to disclose how LMA for two different growth forms may vary with altitude and which leaf attribute determines the within-species variation of LMA. LMA significantly increased with rising altitude, at a pace of 40 g m(-2)/100 m for RAS and 12 g m(-2)/100 m for BP, respectively. LT was mainly responsible for the variability in LMA for RAS, and the variation of LT and LD contributed almost equally for BP. N-mass tended to decrease with rising altitude, and was negatively related to LMA and LT for both species. Foliar delta C-13 showed significantly rising trends with altitude, and was positively correlated with LMA and LT. The results indicated that plants at the extremely high alludes are adapted to possessing especially higher LMA and steeper slopes of the relationships between LMA and allude, as well as lower leaf nitrogen concentrations and higher delta C-13 to cope with the low-temperature environment. Compared with many other studies, LMA for both species are assumed to be more sensitive to the changing environment (especially warming). Also, Rhododendron shrub displayed steeper slope compared with dwarf herbs beneath the shrub layer indicating the former species should be more sensitive to warming climate. In all, exploring the plant strategies via leaf functional traits is of importance to understand the geography of evergreen species in alpine regions and its responses to future climate change.
关键词	NET PRIMARY PRODUCTIVITY CARBON-ISOTOPE DISCRIMINATION CHEMICAL-COMPOSITION METROSIDEROS-POLYMORPHA NITROGEN CONCENTRATION NUTRIENT RESORPTION TIMBERLINE ECOTONES SERGYEMLA MOUNTAINS LIGHT ENVIRONMENT CONSTRUCTION COST
英文关键词	Bergenia; Stable carbon isotope ratios; Leaf density; Rhododendron; Southeast Tibet
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS记录号	WOS:000507381800053
来源期刊	ECOLOGICAL INDICATORS
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/259717
推荐引用方式 GB/T 7714	Zhang, Lin,Yang, Liu,Shen, Wei. Dramatic altitudinal variations in leaf mass per area of two plant growth forms at extreme heights[J]. 中国科学院青藏高原研究所,2020,110.
APA	Zhang, Lin,Yang, Liu,&Shen, Wei.(2020).Dramatic altitudinal variations in leaf mass per area of two plant growth forms at extreme heights.ECOLOGICAL INDICATORS,110.
MLA	Zhang, Lin,et al."Dramatic altitudinal variations in leaf mass per area of two plant growth forms at extreme heights".ECOLOGICAL INDICATORS 110(2020).