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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
Corresponding AuthorWang, Xiaodan
2014
Source PublicationPLOS ONE
ISSN1932-6203
Volume9Issue:10Pages:e109052
SubtypeArticle
AbstractLeaf 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.
KeywordSimulated Climate-change Arctic Soils Nutrient Concentration Grassland Biomes Global Patterns Scale Patterns Mineralization Plants Temperature Carbon
WOS HeadingsScience & Technology
DOI10.1371/journal.pone.0109052
WOS Subject ExtendedScience & Technology - Other Topics
Indexed BySCI
WOS KeywordSIMULATED CLIMATE-CHANGE ; ARCTIC SOILS ; NUTRIENT CONCENTRATION ; GRASSLAND BIOMES ; GLOBAL PATTERNS ; SCALE PATTERNS ; MINERALIZATION ; PLANTS ; TEMPERATURE ; CARBON
Language英语
Quartile3区
TOP
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000343941200032
Funding OrganizationWestern Action Plan Project of the Chinese Academy of Sciences(KZCX2-XB3-08) ; Strategic Pilot Science and Technology Projects of the Chinese Academy of Sciences(XDB03030505)
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Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/8094
Collection山地表生过程与生态调控重点实验室
山地灾害与地表过程重点实验室
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
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.
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