Dissolved inorganic carbon has been hypothesized to stimulate microbial chemoautotrophic activity as a biological sink in the carbon cycle of deep subsurface environments. Here, we tested this hypothesis using quantitative DNA stable isotope probing of metagenome assembled genomes (MAGs) at multiple 13C-labeled bicarbonate concentrations in hydrothermal fluids from a 750 meter deep subsurface aquifer in the Biga Peninsula (Turkey).
FEMS Microbiology Ecology, fiae062, https://doi.org/10.1093/femsec/fiae062