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Chinese Journal of Applied Ecology ›› 2022, Vol. 33 ›› Issue (8): 2171-2177.doi: 10.13287/j.1001-9332.202208.010

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Responses of leaf functional traits of clonal plant Phragmites australis to heterogeneous environments

ZHOU Yi1,2, JIAO Liang1,2*, QIN Hui-jun1,2, WU Jing-jing1,2, CHE Xi-chen1,2   

  1. 1College of Geography and Environment Science, Northwest Normal University, Lanzhou 730000, China;
    2Key Laboratory of Resource Environment and Sustainable Development of Oasis, Lanzhou 730000, China
  • Received:2021-12-28 Accepted:2022-04-07 Online:2022-08-15 Published:2023-02-15

Abstract: The spatial variation of leaf functional traits in Phragmites australis could reflect the changes of resource allocation. The coupling relationship between leaf functional traits and soil environmental factors represents the ecological adaptation strategies of clonal plants to heterogeneous environments. The research object clonal plant, P. australis, was selected from an inland wetland in northwest China. We examined leaf functional traits of P. australis and their responses to soil environmental factors in wetland, salt marsh, and desert habitats. The results showed that from wetland to desert habitat, foliar contents of C, N and P decreased by 7.2%, 40.0% and 64.1%, respectively, and N and P use efficiency increased, leaf length, leaf width, leaf area, leaf dry weight, specific leaf area and leaf thickness showed a decreasing trend. The coevolution of leaf functional traits was observed, indicating a significant correlation between leaf nutrient elements and specific leaf area. Soil bulk density, salinity, and water availability were the most important environmental factors driving the variation of leaf functional traits of P. australis in wetland, salt marsh and desert habitats, respectively.

Key words: clonal plant, ecological strategy, inland wetland, environmental gradient, leaf