Ecosciences du 14 janvier 2026

The rainforest-to-pasture conversion in the Amazon disrupts the methane cycle in upland soils, shifting them from a net methane sink to a source. This shift has been investigated to understand how the soil microbiome responds to the profound above-ground disturbances caused by deforestation. In this talk, I will present current knowledge on the drivers behind this shift in soil–atmosphere methane fluxes and on the restructuring of methane-cycling communities under pasture systems. I will also discuss how pasture management can explore rhizospheric suppression of methanogenic archaea, as well as the potential of soil liming to stimulate active methanotrophs and enhance methane uptake in Amazon pasture soils. This talk will highlight findings from multidisciplinary approaches that integrate real-time greenhouse gas measurements in the field with qPCR, NGS-based microbiome profiling, and DNA-SIP assays.