Stoichiometry of Root and Leaf Nitrogen and Phosphorus in a Dry Alpine Steppe on the Northern Tibetan Plateau

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Stoichiometry of Root and Leaf Nitrogen and Phosphorus in a Dry Alpine Steppe on the Northern Tibetan Plateau
	Hong, Jiangtao1,2 ; Wang, Xiaodan1 ; Wu, Jianbo1
刊名	PLOS ONE
	2014-10-09
卷号	9 期号:10 页码:e109052
关键词	SIMULATED CLIMATE-CHANGE ARCTIC SOILS NUTRIENT CONCENTRATION GRASSLAND BIOMES GLOBAL PATTERNS SCALE PATTERNS MINERALIZATION PLANTS TEMPERATURE CARBON
ISSN号	1932-6203
通讯作者	Wang, Xiaodan
英文摘要	Leaf nitrogen (N) and phosphorus (P) have been used widely in the ecological stoichiometry to understand nutrient limitation in plant. However, few studies have focused on the relationship between root nutrients and environmental factors. The main objective of this study was to clarify the pattern of root and leaf N and P concentrations and the relationships between plant nitrogen (N) and phosphorus (P) concentrations with climatic factors under low temperature conditions in the northern Tibetan Plateau of China. We conducted a systematic census of N and P concentrations, and the N:P ratio in leaf and root for 139 plant samples, from 14 species and 7 families in a dry Stipa purpurea alpine steppe on the northern Tibetan Plateau of China. The results showed that the mean root N and P concentrations and the N: P ratios across all species were 13.05 mg g(-1), 0.60 mg g(-1) and 23.40, respectively. The mean leaf N and P concentrations and the N:P ratio were 23.20 mg g(-1), 1.38 mg g(-1), and 17.87, respectively. Compared to global plant nutrients concentrations, plants distributing in high altitude area have higher N concentrations and N:P, but lower P concentrations, which could be used to explain normally-observed low growth rate of plant in the cold region. Plant N concentrations were unrelated to the mean annual temperature (MAT). The root and leaf P concentrations were negatively correlated with the MAT, but the N:P ratios were positively correlated with the MAT. It is highly possible this region is not N limited, it is P limited, thus the temperature-biogeochemical hypothesis (TBH) can not be used to explain the relationship between plant N concentrations and MAT in alpine steppe. The results were valuable to understand the bio-geographic patterns of root and leaf nutrients traits and modeling ecosystem nutrient cycling in cold and dry environments.
WOS标题词	Science & Technology
类目[WOS]	Multidisciplinary Sciences
研究领域[WOS]	Science & Technology - Other Topics
关键词[WOS]	SIMULATED CLIMATE-CHANGE ; ARCTIC SOILS ; NUTRIENT CONCENTRATION ; GRASSLAND BIOMES ; GLOBAL PATTERNS ; SCALE PATTERNS ; MINERALIZATION ; PLANTS ; TEMPERATURE ; CARBON
收录类别	SCI
语种	英语
WOS记录号	WOS:000343941200032
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/8094]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Hong, Jiangtao,Wang, Xiaodan,Wu, Jianbo. Stoichiometry of Root and Leaf Nitrogen and Phosphorus in a Dry Alpine Steppe on the Northern Tibetan Plateau[J]. PLOS ONE,2014,9(10):e109052.
APA	Hong, Jiangtao,Wang, Xiaodan,&Wu, Jianbo.(2014).Stoichiometry of Root and Leaf Nitrogen and Phosphorus in a Dry Alpine Steppe on the Northern Tibetan Plateau.PLOS ONE,9(10),e109052.
MLA	Hong, Jiangtao,et al."Stoichiometry of Root and Leaf Nitrogen and Phosphorus in a Dry Alpine Steppe on the Northern Tibetan Plateau".PLOS ONE 9.10(2014):e109052.