Fig. 1

a Read length distributions from control runs. Reads were binned by length into bins of size 1000 bp. Distribution for 10.6 kbp library taken from control run in high-to-low experiment. b Violin plots (log scale) of read length distributions from control runs. Distribution for 10.6 kbp library taken from control run in high-to-low experiment. Extrema and means shown in black. c Enrichment factor against relative abundance. Each point represents a species, with the position on the x-axis indicating the original relative abundance of the species and the position on the y-axis indicating the enrichment factor obtained. d Community composition for each enrichment target during the runs