Figure 2

Phylum-level (a) and genus-level (b) compositions of the water microbiome in V-troughs on different tiers. A colour-coded bar plot showing the average bacterial distribution across the different tier groups that were sampled. V1, V3, V5, and V7 represent water samples from V-trough on the 1st, 3rd, 5th and 7th tier, respectively.