Terrestrial environment

Effects of vegetation type on soil microbial community structure and catabolicdiversity assessed by polyphasic methods in North China

HAN Xue-mei , WANG Ren-qing , LIU Jian , WANG Meng-cheng , ZHOU Juan , GUO Wei-hua


Received December 27, 2006,Revised March 06, 2007, Accepted , Available online

Volume 19,2007,Pages 1228-1234

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Soil microbes play a major role in ecological processes and are closely associated with the aboveground plant community. In order to understand the e ects 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 e ect on microbial biomass but a positive impact on the evenness of 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. Di erent 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.

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