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Journal of Desert Research ›› 2023, Vol. 43 ›› Issue (3): 243-251.DOI: 10.7522/j.issn.1000-694X.2023.00025

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Analysis of herbaceous species composition and diversity in the Ordos Arsenic Sandstone Areas

Gaoling Han1,2(), Jianqiang Huo1,2, Yanqiao Zhao1,2, Rui Hu1, Zhishan Zhang1(), Rihui Huang3, Shuwen Xue3   

  1. 1.Shapotou Desert Research and Experiment Station / Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    2.University of Chinese Academy of Sciences,Beijing 100049,China
    3.School of Geographical Sciences,Lingnan Normal University,Zhanjiang 524036,Guangdong,China
  • Received:2023-02-12 Revised:2023-03-21 Online:2023-05-20 Published:2023-05-31
  • Contact: Zhishan Zhang

Abstract:

In order to explore the species composition and diversity of herbaceous species in different types of arsenic sandstone areas and the impact of environmental factors on them, different types of arsenic sandstone areas were selected in the Inner Mongolia Ordos City, to investigate the species composition and diversity of herbaceous plant. The results showed that: The dominant herbaceous species was different in different types of arsenic sandstone areas. The soil-covered area was Stipa capillataSalsola tragusLespedeza bicolorTribulus terrestris; the sand-covered area was S. capillataSetaria viridisArtemisia argyi; the bare area was Chenopodium aristatum. The similarity index of sand-covered area and bare area was 50.0%, those of sand-covered area and soil-covered area and soil-covered area and bare area were 63.6% and 39.1%.There was no significant difference in the diversity index of herbaceous species among different types of arsenic sandstone areas.The evenness index of different topographic sites was significantly different (P=0.027) , which is significantly higher on the slope than on the middle and lower slopes. The results of principal component analysis showed that relative humidity, air temperature, precipitation and soil water content were the main environmental factors affecting species composition and diversity, relative humidity, air temperature and precipitation accounted for 42.4%, 44.5% and 33.4% of the first principal component respectively, and soil moisture accounted for 66.8% of the second principal component. Therefore, understanding the relationship between water conditions and species diversity is helpful for ecological restoration, construction of revegetation and control of soil erosion in arsenic sandstone areas. This study can provide a near-natural plant spatial allocation model for vegetation restoration in arsenic sandstone area, so as to promote the effect of ecological restoration.

Key words: arsenic sandstone, herbaceous plant, species composition, species diversity, water

CLC Number: