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(A) Abundance of ammonia-oxidizers in the distinct areas based on qPCR results. (B) UniFrac weighted PCoA analysis of comammox Nitrospira communities in the estuary tidal flat wetlands of China. Red triangle: Southern estuaries (MJ, ZJ, MLX, NLJ); Green square: Central estuaries (BCYH, SYH, CJ, OJ); Blue circle: Northern estuaries (YR).
