Root volume dynamics reveal increasing stocks in Cerrado fragments in Southeastern Brazil

Aim of study: We assessed root system volumes and their dynamics over intervals of up to 9 years in Cerrado (Brazilian savanna). Area of study: Southeastern Brazil. Material and methods: We used forest inventory data with repeated measurements over time from four Cerrado areas to estimate root volumes. Based on the estimated volumes, we calculated dynamic rates (gain, loss, turnover, and net change). Main results: We found root volumes between 4.792 and 38.491 m3 ha-1. The stocks observed are comparable to the aboveground wood volume reported by previous studies for Cerrado fragments. Our results indicate increasing carbon stocks in all areas, with faster dynamics observed in areas with denser tree cover. Research highlights: Our findings underscore the role of the Cerrado as a carbon sink and reservoir, with significant below-ground biomass stocks. Conservation measures and management techniques should take this into account.