Time-series RNA metabarcoding of the active <i>Populus tremuloides</i> root microbiome reveals hidden temporal dynamics and dormant core members

Members of the rhizosphere exhibit dynamic patterns of activity and dormancy. This study stresses the need to focus on active microbial communities to detect temporal changes in plant microbiomes. Additionally, the metabolic activity of microbes should be considered a key determinant of core microbiome membership. Parallel patterns in active community dynamics between fungal and bacterial communities provide a potentially generalizable rule of microbial community temporal dynamics in plant rhizospheres.