Analysis of microbial community structure in an ecological remediation process of the river water

In urban river ecosystem, microorganism plays a vital role in maintaining ecological balance. Microbial community structure changes triggered with the river remediation progress. However, the change process in different sites from ecological remediation river has not been explored deeply before. We used polymerase chain reaction-denaturing gradient gelelectrophoresis (PCR-DGGE) to examine bacterial diversity of ecological remediated river in Changzhou City, China, and with rarely and severely contaminated rivers which from the same regions as reference. Molecular data were related to environmental parameters through multivariate analysis to investigate the relationship between potential impact of water quality and microbial community structure. As the ecological remediated river, NH₃-N and TP were the important environmental variables influencing microbial community composition. After remediation, the microbial community structure showed a good consistency in each site, the microbial diversity and function were greatly improved, too.