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Acta Prataculturae Sinica ›› 2022, Vol. 31 ›› Issue (6): 79-90.DOI: 10.11686/cyxb2021186

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Change in plant community characteristics along altitudinal gradients in the main browsing areas of Pseudois nayaur in the Helan Mountains

Peng-bo ZHAO1,3(), Kai-yang QIU1,3(), Ying-zhong XIE1,3, Wang-suo LIU1,3, Xiao-wei LI1,3, Lin CHEN2,3, Ji-fei WANG4, Wen-fen MENG1,3, Ye-yun HUANG1,3, Xiao-cong LI1, Hao-nan YANG1   

  1. 1.School of Agriculture,Ningxia University,Yinchuan 750021,China
    2.School of Ecology and Environment,Ningxia University,Yinchuan 750021,China
    3.Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China,Ningxia University,Yinchuan 750021,China
    4.Helan Mountains National Nature Reserve of Ningxia,Yinchuan 750021,China
  • Received:2021-05-07 Revised:2021-06-16 Online:2022-06-20 Published:2022-05-11
  • Contact: Kai-yang QIU

Abstract:

In this research a vegetation survey was conducted to evaluate the changes in plant community composition and species diversity along altitudinal gradients in the main browsing areas of Pseudois nayaur (blue sheep) in the Helan Mountains. Such data is important for the successful management and protection of P. nayaur. One way ANOVA and regression analyses were performed for data from different altitudes. Changes in plant species composition and species diversity were elucidated for four altitudes (1100-1500 m, 1500-2000 m, 2000-2500 m, and above 2500 m) in the main browsing areas of P. nayaur. The influence of altitude on plant species diversity and the relationships between vegetation and herbivores such as P. nayaur are discussed. There were found to be 87 plant species, 62 genera, and 30 families in total, mainly Poaceae, Rosaceae, and Asteraceae in the P. nayaur browsing areas. Meanwhile, there were differences between altitudes in the number and composition of families, genera, and species. With increasing altitude, the species richness of herbaceous plants also increased, while other indices including the Pielou evenness index, Shannon-Wiener diversity index, and Simpson dominance index all initially decreased and then increased. For shrubs, the species richness and Pielou evenness index decreased with increasing altitude; While the Shannon-Wiener diversity index and the Simpson dominance index both peaked at intermediate altitudes. Therefore, in view of the different plant species diversity patterns at different altitudes, it is suggested that different measures should be taken at different altitudes to prevent vegetation degradation and promote the sustainable conservation of the P. nayaur population.

Key words: Helan Mountains, blue sheep (Pseudois nayaur), plant community characteristic, altitudinal gradient