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Nitrogen removal in constructed wetlands (CWs) may be inhibited by salinity. The clarification of the response of microbial community to salt stress is a premise for developing strategies to improve nitrogen removal efficiency in CWs under saline conditions. Results showed that the ammonia nitrogen (NH4+-N), nitrate nitrogen (NO3--N), and total nitrogen (TN) removal percentages significantly (p less then 0.05) decreased in CWs with increasing salinity. The structure and abundance of the microbial community varied with different salinity