Fig. 3From: Vertical niche differentiation of comammox Nitrospira in water-level fluctuation zone of the Three Gorges Reservoir, ChinaSpearman's correlation heatmap: a natural WLF zones and b artificial WLF zones. Correlation analysis of environmental parameters, ammonia-oxidizing microbial amoA gene abundance, and α-diversity index of the CMX community. Significant correlations (P < 0.05) are marked with circles. Different colour scales on the right side indicate different correlation coefficient valuesBack to article page