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Effects of vegetation type on soil microbial community structure and catabolic diversity assessed by polyphasic methods in North China
Authors:HAN Xue-mei  WANG Ren-qing  LIU Jian  WANG Meng-cheng  ZHOU Juan and GUO Wei-hua
Institution:1. School of Life Sciences, Shandong University, Jinan 250100, China
2. School of Life Sciences, Shandong University, Jinan 250100, China;Institute of Environment Research, Shandong University, Jinan 250100, China
3. Institute of Environment Research, Shandong University, Jinan 250100, China
Abstract:Soil microbes play a major role in ecological processes and are closely associated with the aboveground plant community. In order to understand the effects of vegetation type on the characteristics of soil microbial communities, the soil microbial communities were assessed by plate counts, phospholipid fatty acid (PLFA) and Biolog microplate techniques in five plant communities, i.e., soybean field (SF), artificial turf (AT), artificial shrub (AS), natural shrub (NS), and maize field (MF) in Jinan, Shandong Province, North China. The results showed that plant diversity had little discernible effect on microbial biomass but a positive impact on the evennessof utilized substrates in Biolog microplate. Legumes could significantly enhance the number of cultural microorganisms, microbial biomass, and community catabolic diversity. Except for SF dominated by legumes, the biomass of fungi and the catabolic diversity of microbial community were higher in less disturbed soil beneath NS than in frequently disturbed soils beneath the other vegetation types. These results confirmed that high number of plant species, legumes, and natural vegetation types tend to support soil microbial communities with higher function. The present study also found a significant correlation between the number of cultured bacteria and catabolic diversity of the bacterial community. Different research methods led to varied results in this study. The combination of several approaches is recommended for accurately describing the characteristics of microbial communities in many respects.
Keywords:Biolog  legume  microbial biomass  plant diversity  phospholipid fatty acid (PLFA)  soil microbes  North China  methods  polyphasic  diversity  microbial community structure  disturbed soil  vegetation types  combination  Different  research  present  study  significant  correlation  cultured  bacterial community  support  function  high  species
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