Fig. 4

Abundance profile (log2 transformed) of 95 indicator ARGs in all downloaded metagenomic datasets. In the heatmap, four groups of indicator ARGs were arranged from left to right: I. 30 HF indicator ARGs; II. 30 AF indicator ARGs; III.30 WA indicator ARGs; IV. Five NT indicator ARGs. The four heatmap blocks from top to bottom were abundance profile of all indicator ARGs in HF, AF, WA, and NT