Figures
Figure 1: Biofilm height maps (maximum intensity projections, MIPs) of day 10 comparing biofilms of each condition. The calibration bar resembles the biofilm height (\(L_{F}\)) in µm. The scale bar equals 1 mm.
Figure 2: Comparison of the structural biofilm parameters mean biofilm thickness \({\overset{\overline{}}{L}}_{F}\), substratum coverage SC, textural entropy TE, skewness\(R_{\text{SK}}\), kurtosis \(R_{\text{KU}}\), fractal dimensionFD, angular second moment ASM, inverse difference moment IDM, average horizontal \(\text{AHRL}\ \)and average vertical run length AVRL over the course of the experiments (10 days). Inoculation took place on day 0. An overview and meaning of the parameters is provided in Table 2. \(N\) = 10 replicates; E1/E3,  ≙\(c\) = 2.5 mg/L Fe2+; E2/E4, ≙ \(c\) = 0.25 mg/L Fe2+; opened data points ≙ \(u\) = 0.75 cm/s; closed data points ≙ \(u\) = 3.75 cm/s.