Chin J Plant Ecol ›› 2020, Vol. 44 ›› Issue (10): 1087-1094.DOI: 10.17521/cjpe.2020.0072

• Data Paper • Previous Articles    

Basic characteristics of Stipa sareptana var. krylovii communities in China

LU Shuai-Zhi1,2, QIAO Xian-Guo1,2, ZHAO Li-Qing3, WANG Zi1,2, GAO Chen-Guang4, WANG Jing1,2, GUO Ke1,2,*()   

  1. 1State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
    2University of Chinese Academy of Sciences, Beijing 100049, China
    3College of Life Science, Inner Mongolia University, Hohhot 010021, China
    4Institute of Environmental Sciences, Universiteit Leiden, Leiden 2333CC, The Netherlands
  • Received:2020-03-17 Online:2020-10-20 Published:2020-09-03
  • Contact: GUO Ke
  • Supported by:
    Second Tibetan Plateau Scientific Expedition and Research Program(2019QZKK0301);Biodiversity Survey and Assessment Project of the Ministry of Ecology and Environment, China(2019HJ2096001006);National Key Basic Research Program of China(2015FY210200)

Abstract:

Stipa sareptana var. krylovii alliance is one of the typical steppes endemic to Central Asia. The eastern border of its distribution is adjacent to the meadow steppes on the Hulunbeir Plateau, the western border extends to the desert steppes on the Ulanqabu Plateau and Tianshan Mountains, and the southern border lies among the warm temperate steppes on the Loess Plateau. The distribution of this alliance also spreads into the alpine steppes on the eastern margin of the Qinghai-Xizang Plateau. The broad its distribution suggests that S. sareptana var. krylovii alliance has wide ecological adaptability. In this study, we described and analyzed the eco-geographical distribution, community characteristics and classification of S. sareptana var. krylovii alliance based on data from 117 plots. The results showed that there are 336 seed plants belonging to 36 families and 131 genera in these plots. The families with more than 15 species are Gramineae, Compositae, Leguminosae, Rosaceae, Chenopodiaceae and Liliaceae. Among all species in these plots, 91.67% are rare species with occurrence frequency smaller than 20%. Besides S. sareptana var. krylovii, the most common species in this alliance include Cleistogenes squarrosa, Heteropappus altaicus, Agropyron cristatum, Koeleria cristata, Potentilla bifurca, Salsola collina, Allium tenuissimum and Leymus chinensis. In addition, hemicryptophytes are the most common life form within the surveyed plots, accounting for 66.37% of all species. Xerophytes are the most common water ecological type, accounting for 61.19% of all species. East Palearctic element was the major floristic geographical element, accounting for 33.33% of all species. Based on the China Vegetation Classification System, S. sareptana var. krylovii alliance could be classified into 6 association groups and further into 45 associations.

Key words: Stipa sareptana var. krylovii, life form, floristic geographical element, community classification