Fixation of CO2 by Soil Fungi: Contribution to Organic Carbon Pool and Destination of Fixed Carbon Products

Dark microbial CO2 fixation plays a crucial role in soil organic carbon (SOC) sequestration, but the fungus contributions to this process in varying agroecosystems remain unclear. This study investigated fungal CO2 fixation in 29 soil samples collected from the major agricultural regions across China. Phospholipid fatty analysis-stable isotope probing revealed variations in fungal fixation by 2.2 to 65.5