Impacts of deforestation and forest regeneration on soil bacterial communities associated with phosphorus transformation processes in the Brazilian Amazon region

•Land-use change altered the total amount of phosphorus and its fractions in Amazon soils.•Changes in soil's chemical properties impacted the diversity and structure of the bacterial community involved in the P transformation process.•Forest-to-pasture conversion increased abundance of bacterial groups involved in the P mineralization.•Secondary forest re-establishment leads to a recovery of bacterial groups involved in the P transformation and some of their potential functions.