【土壤CO2浓度升高对土壤古菌和细菌群落的影响】Nataša Šibanc^{a b} Alex J. Dumbrell^c Ines Mandić-Mulec^d Irena Maček^{a b} . Impacts of naturally elevated soil CO₂concentrations on communities of soil archaea and bacteria.Soil Biology and BiochemistryVolume 68 January 2014 Pages 348–356

Abstract

There is a limited understanding of the importance of abiotic factors in regulating biodiversity and structure of many functionally important soil microbial communities. In this paper we present a molecular characterisation of archaeal and bacterial communities exposed to long-term change in soil abiotic environment at natural CO₂ springs (mofettes) using T-RFLP profiling and examination of 16S rRNA clone libraries. Our results show major shifts in archaeal and bacterial communities towards anaerobic and methanogenic taxa dominating in CO₂ rich hypoxic soils with a significant increase in abundance of Methanomicrobia and predominantly anaerobic Chloroflexi and Firmicutes. O₂ concentration in soil was consistently shown to be the strongest predictor of the compositional changes across both the archaeal and bacterial communities. However soil pH and total N were most important in separating the archaeal communities in transition and control zones but not the bacterial communitie