Fig. 6From: Active eukaryotes in drinking water distribution systems of ground and surface waterworksHeatmap clustering analysis of eukaryotic members by relative activity recovery (%). Only the most important OTUs (30% highest variation in the dataset) and their representative taxa ranked from D4 to D6 level are shown (see the entire dataset by kingdoms in Additional file 7: Figures S4–S10). Red color represents a high activity recovery, i.e., relative abundance (%) is higher in the RNA than the DNA library, and blue color represents low activity recovery in the sample. Kingdom marked inside the bracketsBack to article page