Dredging alleviates cyanobacterial blooms by weakening diversity maintenance of bacterioplankton community

• Environmental adaptation of bacterioplankton decreased after dredging. Stochastic processes community increased Sediment total phosphorus mediated balance between stochasticity and determinism. Disentangling ecological mechanisms behind dredging is meaningful to implement environmental policy for improving water quality. However, assembly in response disturbance are poorly understood. Based on Illumine MiSeq sequencing multiple statistical analyses, we estimated interactions, functions, breadths, phylogenetic signals, clustering, before We found distinct change composition, comparable decreases diversity, functional redundancy conflicting interaction, relatively low weak The was affected by both stochastic deterministic dredging, but dominated a decisive factor balancing determinism Consequently, taxonomic ?-diversities exhibited higher contributions the trophic level represented chlorophyl ? than afterwards. Our results emphasized changes caused with nutrient loss drift playing important roles. These findings extend knowledge contribution diversity decipher maintenance which useful guiding mitigation cyanobacterial blooms.