Biodiv Sci ›› 2019, Vol. 27 ›› Issue (8): 911-918.DOI: 10.17520/biods.2019237

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Community structure and diversity of soil bacteria in different habitats of Da Liangzihe National Forest Park in the Lesser Khinggan Mountains

Jun Liu1,Ning Wang2,Daizong Cui2,Lei Lu2,Min Zhao2,*()   

  1. 1. Inner Mongolia Daxing’anling Forestry Science and Technology Research Institute, Yakeshi, Inner Mongolia 022150;
    2. College of Life Sciences, Northeast Forestry University, Harbin 150040
  • Received:2019-07-25 Accepted:2019-09-19 Online:2019-08-20 Published:2019-09-25
  • Contact: Zhao Min

Abstract:

Soil bacteria are important participants in the material cycling and energy flows in forest ecosystems. Therefore, the composition and biodiversity of bacterial communities are major indicators of soil ecological function. The aim of this study was to investigate the structure and diversity of bacterial communities across seven different habitats (i.e. Pinus koraiensis, Larix gmelinii, Quercus mongolica, Betula costata, coniferous-broad-leaved mixed forests, shrubs and meadows) in Da liangzihe National Forest Park by using high throughput sequencing technology. At the phylum level, the bacterial community composition was basically the same in all habitats, with Proteobacteria, Actinobacteria, Acidobacteria and Verrucomicrobia dominating the bacterial phyla by having relative abundance of more than 10%. At the genus level, 245 genera were identified, with 118 common genera accounting for 48.2% of all genera and 97.8% of the total relative abundance. The dominant genera, Spartobacteria_genera_incertae_sedis, Gaiella, Gp16 and Gp4, made up 47.0% of the total relative abundance. Spartobacteria_genera_incertae_sedis was the most abundant genus in every habitat. In addition, the soil bacterial diversity and the soil physicochemical factors differed significantly among the habitats. Both the diversity and richness of the soil bacterial community were higher in Pinus koraiensis than the other habitats. Soil pH was found to be a key factor affecting soil bacterial community diversity in Da Liangzihe National Forest Park.

Key words: the Lesser Khinggan Mountains, high throughput sequencing, different habitats, bacterial diversity, soil pH