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Acta Prataculturae Sinica ›› 2010, Vol. 19 ›› Issue (1): 6-13.

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A study on niches of dominant species of subalpine meadow in the Yunding Mountain

LI Bin1, LI Su-qing2, ZHANG Jin-tun3   

  1. 1.College of Chemical Technology and Environment, North University of China, Taiyuan 030051,
    China;
    2.Geography Department, Taiyuan Normal University, Taiyuan 030012, China;

    3.College of Life Science, Beijing Normal University, Beijing 100875, China
  • Received:2009-03-12 Online:2010-01-25 Published:2010-02-20

Abstract: TWINSPAN was used to divide 36 quadrates of subalpine meadow in the Yinding Mountain into five types of communities as five resource states. Niche breadths and niche overlaps of dominant species of the subalpine meadow were measured and analyzed using the indexes proposed by Levins, Shannon-Wiener, and Petraits. Niche breadth of Kobresia bellardii was the biggest among the ten dominant species with a Levins niche breadth of 8.78 and Shannon-Wiener niche breadth of 31.58. The species had extensive adaptation to the environment. The bigger the species’ niche breadths in the subalpine meadow, the more extensive were their adaptation to the environment and the stronger their capabilities of using resources. The greater were the species’ niche overlaps, the greater were the ecological similarities between species and their resources-use. The niche overlaps of the dominant species in K. bellardii and Taraxacum mongolicum communities were the biggest (0.914), and the two species had common characteristics of resource use.

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