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摘要The phylogenetic diversity of bacterial communities in the response to environmental disturbance such as organic pollution has been well studied,but little known about how organic contaminants influence evolutionary responses of cultural functional bacteria.In the present study,tolerance assays for bacterial communities were conducted by using pyrene and estrogens as different environmental stresses.A total of 111 bacterial strains exhibiting degrading or endurance capability to these two compounds (pyrene and estrogens) were successfully isolated,which were mainly affiliated to three orders Pseudomonadales,Vibrionales,and Rhodobacterales.Molecular ecological networks and phylogenetic trees based on bacterial strains isolated from different time intervals showed that the evolution of functional bacteria under the stress of organic contaminants could significantly accelerate the succession of the entire bacterial community.Some functional bacteria,such as Pseudomonas and Vibrio exhibited indispensable effects on the structural stability of the bacterial community.Further,the results indicated that the new phylotypes could adapt the contaminated environments and contributed significantly to the shifts of the microbial community.Overall,this study demonstrated that role of evolutionary responses of cultural functional bacteria were crucial for the adaptation of bacterial communities to environmental disturbance.