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Chinese Journal of Applied Ecology ›› 2018, Vol. 29 ›› Issue (12): 3934-3940.doi: 10.13287/j.1001-9332.201812.021

• Research paper • Previous Articles     Next Articles

Elevational variations of leaf stochiometry in Leontopodium leontopodioides on the Qinghai-Tibetan Plateau, China

XU Xue-yun1, QIN Yan-yan2, CAO Jian-jun1*, LI Meng-tian1, GONG Yi-fan1, ZHANG Xiao-fang1   

  1. 1College of Geography and Environment Science, Northwest Normal University, Lanzhou 730070, China;
    2Key Laboratory of Land Surface Process and Climate Change in Cold and Dry Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2018-04-25 Revised:2018-10-08 Online:2018-12-20 Published:2018-12-20
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (41461109), National Natural Science Foundation of Gansu Province (1506RJZA124), and Open Fund of Key Laboratory of Eco-hydrology of Inland River Basin, Chinese Academy of Sciences (KLEIRB-ZS-16-01).

Abstract: Topography has major impacts on the trade-off of plant survival strategies. Exploring the differential pattern of leaf ecological stoichiometry along the elevation gradient contributes to a better understanding of plant’s response to environmental changes and its ecological adaptability. We investigated leaf C, N, and P concentrations and stoichiometric ratios of Leontopodium leontopodioides at three elevations, including from 4400 m to 4700 m, from 4701 m to 5000 m, and from 5001 m to 5300 m, on the northeastern margin of the Qinghai-Tibetan Plateau in China. The results showed that the concentrations of leaf C, N, and P of L. leontopodioides were 405.36 g·kg-1, 18.42 g·kg-1 and 0.94 g·kg-1, respectively. Leaf C/N, C/P, and N/P were 22.67, 467.61 and 20.30, respectively. The concentrations of leaf N and P of L. leontopodioides consistently increased with the increases of elevation. The coefficient of variations for leaf C, N and P concentrations and ratios of L. leontopodioides were all less than 30%, with an order of P (30%) > C/P (29%) > C/N (18%) > N (17%) > N/P (15%) > C (3%). The growth of L. leontopodioides on the Qinghai-Tibetan Plateau was mainly limited by P availability.