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Journal of Desert Research ›› 2021, Vol. 41 ›› Issue (6): 65-77.DOI: 10.7522/j.issn.1000-694X.2021.00080

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Biodiversity of plant communities and its environmental interpretation in the Otindag Sandy Land, China

Danhui Qi1,4(), Hongxiao Yang5, Qi Lu1,2, Jianmin Chu3(), Qi Yuan3, Honghao Gan3, Shuai Zhao3, Jiawei Chen3, Xiaoqing Xu3   

  1. 1.Institute of Desertification Studies /, Chinese Academy of Forestry,Beijing 100091,China
    2.Experimental Center of Desert Forestry /, Chinese Academy of Forestry,Beijing 100091,China
    3.Research Institute of Forestry, Chinese Academy of Forestry,Beijing 100091,China
    4.College of Ecology and Environment,Southwest Forestry University,Kunming 650224,China
    5.College of Resources and Environment,Qingdao Agricultural University,Qingdao 266109,Shandong,China
  • Received:2021-05-24 Revised:2021-07-14 Online:2021-11-20 Published:2021-12-17
  • Contact: Jianmin Chu

Abstract:

It is important to study the characteristics of species diversity and the relationship between species diversity and environment in sandy land communities to maintain the structure and function of sandy land ecosystem. Based on the community and environmental data of 83 plots in the Otindag Sandy Land, this study analyzed the community species diversity and its influencing factors by quantitative ecology method, and explored the characteristics of species diversity and its environmental explanations in the Otindag Sandy Land. The results showed that: (1) The main communities are Form. Ulmus pumila, Form. Caragana microphylla, Form. Salix gordejevii and Form. Prunus pedunculata. The main environmental factors affecting the community distribution in this area are precipitation in the growing season, temperature, soil total nitrogen and total potassium content. The difference of precipitation significantly affectes the distribution pattern of the community. (2) The distribution of plant diversity in the Otindag Sandy Land shows regular changes. The diversity indices increases with the increase of longitude and altitude, Patrick index and Shannon-wiener index decreases with the increase of latitude, Simpson index and Pielou index increases with the increase of latitude. Patrick index, Simpson index and Shannon-wiener index are significantly positively correlated with precipitation in the growing season, soil organic carbon and available nitrogen contents, and negatively correlated with mean temperature, accumulated temperature above 0 ℃ and wind speed in the growing season. None of the environmental variables is significantly correlated with Pielou index. The results of this study elucidate the rules of species diversity and plant community distribution in the Otindag Sandy Land, as well as their relationships with key environmental factors, which are beneficial to improve the diversity and stability of plants in the sandy land and enhance the ecological function of vegetation in the sandy land.

Key words: plant diversity, environmental factor, CCA, Otindag Sandy Land

CLC Number: