干旱区研究 ›› 2022, Vol. 39 ›› Issue (4): 1122-1132.doi: 10.13866/j.azr.2022.04.13

• 植物生态 • 上一篇    下一篇

阴山北麓荒漠区6种植物群落的土壤细菌特征

蒋星驰1,2(),李俊瑶1,2,陈峰3,李盛林3,温苏雅勒图4,王国林4,王少昆1,2()   

  1. 1.中国科学院西北生态环境资源研究院,乌拉特荒漠草原研究站,甘肃 兰州 730000
    2.中国科学院大学,北京 100049
    3.巴彦淖尔市乌拉特国家级自然保护区管理局,内蒙古 巴彦淖尔 015000
    4.乌拉特梭梭林蒙古野驴国家级自然保护区乌拉特后旗管理站,内蒙古 巴彦淖尔 015543
  • 收稿日期:2021-12-06 修回日期:2022-04-18 出版日期:2022-07-15 发布日期:2022-09-26
  • 通讯作者: 王少昆
  • 作者简介:蒋星驰(1997-),硕士研究生,研究方向为土壤微生物生态学. E-mail: pandalinux@163.com
  • 基金资助:
    国家科技基础资源调查专项(2017FY100200);国家自然科学基金(41771117);内蒙古乌拉特梭梭林-蒙古野驴国家级自然保护区生态监测项目(E1900504)

Soil bacterial characteristics of six plant communities in the desert areas to the North of Yinshan Mountains

JIANG Xingchi1,2(),LI Junyao1,2,CHEN Feng3,LI Shenglin3,Wensuyaletu 4,WANG Guolin4,WANG Shaokun1,2()   

  1. 1. Urat Desert-Grassland Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
    3. Bureau of Urat National Nature Reserve in Bayannur City, Bayannur 015000, Inner Mongolia, China
    4. Urad Rear Banner Management Station of National Nature Reserve of Haloxylon ammodendron and Equus hemionus, Bayannur 015543, Inner Mongolia, China
  • Received:2021-12-06 Revised:2022-04-18 Online:2022-07-15 Published:2022-09-26
  • Contact: Shaokun WANG

摘要:

灌木、半灌木和小乔木是干旱荒漠区主要的植物类型,这些荒漠植物在维持荒漠区生物多样性和生态功能方面起着重要的作用。利用高通量测序技术,分析了阴山北麓荒漠区6种典型荒漠植物群落:红砂(Reaumuria songarica)、白刺(Nitraria tangutorum)、沙冬青(Ammopiptanthus mongolicus)、蒙古短舌菊(Brachanthemum mongolicum)、盐爪爪(Kalidium foliatum)和梭梭(Haloxylon ammodendron)的土壤细菌多样性和群落组成及其与土壤因子的关系。结果表明:(1) 6种荒漠植物群落土壤理化性质差异显著,其中盐爪爪和红砂群落土壤水分和养分条件较好;(2) 土壤细菌优势类群均为放线菌门(Actinobacteria)和变形菌门(Proteobacteria),两者占细菌总数的60%以上,优势细菌门所占比例在6种植物群落之间差异显著;(3) 盐爪爪群落土壤特异性细菌物种数显著高于其他植物群落,盐爪爪与红砂群落的土壤细菌Shannon多样性指数显著高于其他植物群落,Shannon多样性指数对环境变化的响应更为敏感,土壤水分和养分越高,细菌Shannon指数越高;(4) 冗余分析(RDA)结果表明:不同植物群落引起的土壤含水量、机械组成、pH和电导率的变化驱动了土壤细菌群落组成。

关键词: 阴山北麓荒漠区, 荒漠植物, 扩增子16S, 细菌多样性, 土壤因子

Abstract:

Shrubs are the main plant forms in arid desert areas and play an important role in maintaining biodiversity and ecological functions in these areas. We utilized high-throughput sequencing technology to analyze the soil bacterial diversity of six typical desert plant communities in the desert areas to the north of the Yinshan Mountains: Reaumuria songarica, Nitraria tangutorum, Ammopiptanthus mongolicus, Brachanthemum mongolicum, Kalidium foliatum, and Haloxylon ammodendron. The results showed the following: (1) The dominant phyla of soil bacteria in the six vegetation communities were Actinobacteria and Proteobacteria. (2) The Shannon diversity index of bacteria is sensitive to environmental changes. The higher the Shannon index, the better the soil nutrient status. (3) Soil moisture content, mechanical composition, pH value, electrical conductivity, and vegetation type are all factors that significantly drive the composition of the bacterial community structure.

Key words: desert areas to the North of Yinshan Mountains, desert plant, 16S, bacterial diversity, soil factors