Deciphering the diversity patterns and community assembly of rare and abundant bacterial communities in a wetland system

Assembly of rare taxa with lower niche breadth were mainly governed by homogeneous selection implying that their higher sensitivity to environmental disturbances and changes in TN played significant roles in community assembly of rare taxa. In contrast, assembly of abundant taxa with higher niche breadth were dominated by stochastic processes (undominated process and dispersal limitation) indicating that abundant taxa undertook more responsibilities in maintaining community structure when exposed to environmental fluctuations. Our results broadened the understanding of the microbial structure, interactions and ecological assembly mechanisms underlying microbial dynamics in aquatic ecosystems, which are crucial to management of microorganisms in the wetland.