干旱区生态环境知识资源中心(Arid): Variations in leaf traits of Juniperus przewalskii from an extremely arid and cold environment

Arid

DOI	10.1016/j.scitotenv.2019.06.237
	Variations in leaf traits of Juniperus przewalskii from an extremely arid and cold environment
	Wang, Fang 1; Gou, Xiaohua 1; Zhang, Fen 1; Wang, Yanfang 1; Yu, Ailing 1; Zhang, Junzhou 1; Fonti, Patrick 2,3; Liu, Jianguo 1
通讯作者	Gou, Xiaohua
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2019
卷号	689 页码:434-443
英文摘要	How leaf traits vary with environmental and climatic variables in cold and arid environments is an essential issue in environmental ecology. Here, we analyzed the variations in leaf nitrogen (N) and phosphorus (P) stoichiometry and leaf dry matter content (LDMC) in Qilian juniper (Juniperus przewalskii Kom.) growing in 14 environmentally different plots on the northeastern Tibetan Plateau. The results showed that the N and P concentrations, N:P ratio and LDMC of Qilian juniper were 10.89 mg.g(-1), 1.04 mg.g(-1), 10.80 and 483.06 mg.g(-1), respectively. The spatial coefficients of the variations in leaf N and P stoichiometry were significantly higher than the seasonal ones, and the correlations of leaf N and P concentrations with spatial variables were stronger than their correlations with the season. During the growing season, only the leaf N concentration and N:P ratio significantly increased. Soil nutrients were highly positively significantly correlated with leaf P concentrations but negatively correlated with the N:P ratio and LDMC. However, leaf N concentrations showed no significant correlations with soil nutrients. We suggest that the effects of temperature on the N concentration and LDMC were stronger than the effects of drought, while those on the P concentration and N:P ratio were weaker. Drought reduced leaf N and P concentrations and increased the N:P ratio and LDMC. In the arid region, with an increasing mean annual temperature (MAT), leaf N concentration significantly decreased, and LDMC significantly increased. In the semi-arid region, as MAT increased, leaf N and P concentrations significantly increased and LDMC and the N:P ratio significantly decreased. These opposite results supported the growth rate hypothesis that plant N and P concentrations increase while the N:P ratio and LDMC decrease as the growth rate increases. (C) 2019 Elsevier B.V. All rights reserved.
英文关键词	Nitrogen and phosphorus stoichiometry loaf dry matter content Qilian juniper Spatial and seasonal Climate and soil The growth rate hypothesis
类型	Article
语种	英语
国家	Peoples R China ; Switzerland
开放获取类型	Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000482379400041
WOS关键词	EASTERN QILIAN MOUNTAINS ; PLANT-GROWTH ; PHOSPHORUS STOICHIOMETRY ; CHINA IMPLICATIONS ; PICEA-CRASSIFOLIA ; CARBON STORAGE ; NORWAY SPRUCE ; TREE GROWTH ; NITROGEN ; TERRESTRIAL
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
EI主题词	2019-11-01
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310618
作者单位	1.Lanzhou Univ, Coll Earth & Environm Sci, MOE Key Lab Western Chinas Environm Syst, Lanzhou 730030, Gansu, Peoples R China; 2.Swiss Fed Inst Forest Snow & Landscape Res WSL, Forest Dynam, Landscape Dynam, CH-8903 Birmensdorf, Switzerland; 3.Swiss Fed Inst Forest Snow & Landscape Res WSL, Forest Soils & Biogeochem, CH-8903 Birmensdorf, Switzerland
推荐引用方式 GB/T 7714	Wang, Fang,Gou, Xiaohua,Zhang, Fen,et al. Variations in leaf traits of Juniperus przewalskii from an extremely arid and cold environment[J]. 兰州大学,2019,689:434-443.
APA	Wang, Fang.,Gou, Xiaohua.,Zhang, Fen.,Wang, Yanfang.,Yu, Ailing.,...&Liu, Jianguo.(2019).Variations in leaf traits of Juniperus przewalskii from an extremely arid and cold environment.SCIENCE OF THE TOTAL ENVIRONMENT,689,434-443.
MLA	Wang, Fang,et al."Variations in leaf traits of Juniperus przewalskii from an extremely arid and cold environment".SCIENCE OF THE TOTAL ENVIRONMENT 689(2019):434-443.