Journal of Resources and Ecology ›› 2021, Vol. 12 ›› Issue (1): 11-21.DOI: 10.5814/j.issn.1674-764x.2021.01.002

• Forest Ecosystem • Previous Articles     Next Articles

Community Structure and Diversity Distribution Pattern of Sandy Plants in the Middle and Upper Reaches of the Yarlung Zangbo River

LI Chao1,2(), XU Wenli3, LI Qingkang1, WANG Jingsheng1,*()   

  1. 1. Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
    3. School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China
  • Received:2020-05-02 Accepted:2020-07-08 Online:2021-01-30 Published:2021-03-30
  • Contact: WANG Jingsheng
  • About author:LI Chao, E-mail: chaoli627@163.com
  • Supported by:
    The National Key Research and Development Program of China(2016YFC0502006)

Abstract:

The Yarlung Zangbo River Basin is an important populated area in Tibet, and its plant community structure and diversity pattern have attracted the attention of many scholars. In this paper, the distribution pattern of plant diversity and the environmental factors impacting it in the middle and upper reaches of the Yarlung Zangbo River are revealed and discussed through sample surveys and climate and habitat data. The results show that the plant communities in the study area can be divided into seven types according to the dominant species: Artemisia minor + Stipa purpurea, Artemisia wellbyi + Festuca ovina, Potentilla fruticosa + Orinus thoroldii, Trikeraia hookeri + Artemisia frigida, Kobresia pygmaea, Sophora moorcroftiana + Artemisia hedinii, and Sophora moorcroftiana + Pennisetum centrasiaticum. Plant diversity decreases with decreasing longitude, increasing latitude, and increasing altitude; and the diversity distribution pattern in the study area has distinct zonal characteristics. Water and heat are the main factors which affect the distribution of vegetation types. The explanation rates of water and heat for the plant diversity distribution pattern were 19.3% and 5.7%, respectively, while the spatial variation explained by these two factors together was 60.8%. Therefore, the coupling effect is obvious.

Key words: Yarlung Zangbo River, community structure, diversity, pattern