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榆靖沙漠高速公路沿线植被特征及其多样性

宋绍鹏1,董治宝1,2*,陈颢1,崔徐甲1,李超1,肖锋军1,李晓岚1,邵天杰1#br#   

  1. 1陕西师范大学旅游与环境学院, 西安 710062; 2中国科学院寒区旱区环境与工程研究所沙漠与沙漠化重点实验室, 兰州 730000)
  • 出版日期:2017-02-10 发布日期:2017-02-10

Vegetation characteristics and species diversity along the Yujing desert highway.

SONG Shao-peng1, DONG Zhi-bao1,2*, CHEN Hao1, CUI Xu-jia1, LI Chao1, XIAO Feng-jun1, LI Xiao-lan1, SHAO Tian-jie1#br#   

  1. (1College of Tourism and Environment sciences, Shaanxi Normal University, Xi’an 710062, China; 2Key Laboratory of Desert and Desertification, Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China).
  • Online:2017-02-10 Published:2017-02-10

摘要: 以野外植被调查、物种多样性计算和土壤含水量测定为基础,分析了榆靖沙漠高速公路沿线植被特征,物种多样性指数及其与土壤含水量之间的关系。结果表明:(1)研究区主要物种共计16科39属49种,油蒿为分布最广泛的优势种,植物群落以油蒿群落最为常见;各区域重要值大于0.1的物种中灌木和半灌木占优势。(2)12个小研究区的Shannon指数平均值1.42~2.05,其中研究区E最高,研究区G最低;由于黄土覆盖区(采样线5)土壤养分含量良好,植物生长发育良好,植被覆盖度较高,其Shannon指数和Sorenson相似性指数高于其他3种生境条件的研究区。(3)Pielou指数与0~10 cm土层的含水量呈显著负相关,而物种丰富度与20~30 cm土层的含水量呈显著正相关。

Abstract: Based on the research of field vegetation, the calculation of species diversity and the determination of soil moisture content, the vegetation feature along Yujing desert highway, species diversity index and its relationship with soil moisture content were analyzed. The results indicated that: (1) there were mainly 16 families, 39 genera and 49 species living in the study area. Artemisia ordosica was the dominant species which was most widely distributed, and its community was the most common one among plant communities. Shrubs and semishrubs were dominant species among the field vegetation whose important value was larger than 0.1 in each region. (2) The average of Shannon index in twelve small study areas varied from 1.42 to 2.05. Among these small study areas, the highest average was in study area E, while the lowest was in study area G. Because of favorable soil nutrient content, wellgrown plants and high vegetation cover in loesscovered area (sample line 5), whose Shannon index and Sorenson similarity index were higher than other three study areas with three kinds of ecological conditions. (3) Pielou index was significantly correlated with the soil moisture content of soil profile in 0-10 cm, so did the richness of species to that of soil profile in 20-30 cm.