Microbiomes in Soils Exposed to Naturally High Concentrations of CO₂ (Bossoleto Mofette Tuscany, Italy).

ABSTRACT: Direct and indirect effects of extremely high geogenic CO₂ levels, commonly occurring in volcanic and hydrothermal environments, on biogeochemical processes in soil are poorly understood. This study investigated a sinkhole in Italy where long-term emissions of thermometamorphic-derived CO₂ are associated with accumulation of carbon in the topsoil and removal of inorganic carbon in low pH environments at the bottom of the sinkhole. The comparison between interstitial soil gasses and those collected in an adjacent bubbling pool and the analysis of the carbon isotopic composition of CO₂ and CH₄ clearly indicated the occurrence of CH₄ oxidation and negligible methanogenesis in soils at the bottom of the sinkhole. Extremely high CO₂

SUBMITTER: Fazi S 

PROVIDER: S-EPMC6797827 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature