干旱区生态环境知识资源中心(Arid): Stoichiometry of leaf carbon, nitrogen, and phosphorus along a geographic, climatic, and soil gradients in temperate desert of Hexi Corridor, northwest China

Arid

DOI	10.1093/jpe/rtz045
	Stoichiometry of leaf carbon, nitrogen, and phosphorus along a geographic, climatic, and soil gradients in temperate desert of Hexi Corridor, northwest China
	Zhang, Ke 1,2; Li, Mengmeng 1; Su, Yongzhong 3; Yang, Rong 3
通讯作者	Su, Yongzhong
来源期刊	JOURNAL OF PLANT ECOLOGY
ISSN	1752-9921
EISSN	1752-993X
出版年	2020
卷号	13 期号:1 页码:114-121
英文摘要	Aims Understanding the regional pattern of leaf stoichiometry and its contributing variables are of importance for predicting plant responses to global change and modelling the productivity and nutrient fluxes of ecosystems. In this study, we investigated leaf stoichiometry of plants that sampled from Hexi Corridor, a typical arid region in China, and tried to explore the contribution variables on leaf stoichiometry along the geographic, climatic, and soil gradients. Methods In August 2012, 70 sites in Hexi Corridor were investigated. Plant leaves and soils from five equivalent plots within each site were sampled. C, N, and P contents of leaf and soil were measured. Important findings Compared with leaf N and P contents in regional and global scales, leaf N content in Hexi Corridor was close to them with the value of 20.19 mg g(-1), while leaf P content was lower than them with the value of 1.34 mg g(-1). Overall, leaf N:P value in Hexi Corridor was 15.70. Individually, leaf N:P values of shrubs and herbs were 16.81 and 14.80, respectively. Scaling exponents for leaf N vs. P of overall and shrubs in Hexi Corridor were 1.29, higher than the scaling exponent of herbs (1.08). Leaf stoichiometry of shrubs and herbs did not show significant latitudinal and longitudinal patterns, meanwhile, it has no significant correlation with mean annual precipitation (MAP), mean annual temperature (MAT), and soil elements. However, only leaf stoichiometry of herbs has significant correlation with altitude and aridity degree. These results indicate that plants in Hexi Corridor are possibly co-limited by N and P, while shrubs are mainly limited by soil P and herbs are limited by soil N. Scaling relationship reveals that leaf N vs. P of herbs is isometric. With increasing altitude, the quadratic regression for leaf C and N contents and the linear regression for leaf P content of herbs reflect the difference responses of the three elements on the variation of MAT along the altitude and it could be explained by plant physiology hypothesis and biogeochemical hypotheses. With decreasing aridity, leaf N and N:P of herbs increased significantly, inferring that herbs growth would be limited by P increasingly and strengthening the increasing nitrogen availability with increasing precipitation. In conclusion, different altitude and aridity patterns for leaf stoichiometry of herbs and shrubs reveal the plastic survive strategies of different xerophytes in Hexi Corridor. Moreover, leaf stoichiometry of herbs in Hexi Corridor could be as indicator of the changing environment that caused by aridity.
英文关键词	leaf stoichiometry shrubs herbs aridity Hexi Corridor
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000529932500015
WOS关键词	N-P STOICHIOMETRY ; NUTRIENT ; TERRESTRIAL ; GRASSLAND ; PATTERNS ; TRAITS ; RATIO ; RESORPTION ; FORESTS ; ARIDITY
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318833
作者单位	1.Zhengzhou Univ Light Ind, Sch Mat & Chem Engn, Zhengzhou 450000, Peoples R China; 2.Collaborat Innovat Ctr Environm Pollut Control &, Zhengzhou 450000, Henan, Peoples R China; 3.Chinese Acad Sci, Linze Inland River Basin Res Stn, Northwest Inst Ecoenvironm & Resources, CAS Key Lab Ecohydrol Inland River Basin, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Ke,Li, Mengmeng,Su, Yongzhong,et al. Stoichiometry of leaf carbon, nitrogen, and phosphorus along a geographic, climatic, and soil gradients in temperate desert of Hexi Corridor, northwest China[J],2020,13(1):114-121.
APA	Zhang, Ke,Li, Mengmeng,Su, Yongzhong,&Yang, Rong.(2020).Stoichiometry of leaf carbon, nitrogen, and phosphorus along a geographic, climatic, and soil gradients in temperate desert of Hexi Corridor, northwest China.JOURNAL OF PLANT ECOLOGY,13(1),114-121.
MLA	Zhang, Ke,et al."Stoichiometry of leaf carbon, nitrogen, and phosphorus along a geographic, climatic, and soil gradients in temperate desert of Hexi Corridor, northwest China".JOURNAL OF PLANT ECOLOGY 13.1(2020):114-121.