Figure 6
Biofilm biovolumes derived from confocal laser scanning microscopy (CLSM) image data (A,C), with two representative maximum intensity projections (B,D). (A,B) Biofilm data from a control location (Rio Niltre) showing the dominance of eukaryotic algae. (C,D) Downstream site of the aquaculture (Rio Niltre) with biofilms dominated by non-phototrophic bacteria. Colour code: blue, autofluorescence of chlorophyll a; purple, cyanobacteria; green, bacteria; red, lectin-specific EPS-glycoconjugates. Bacterial production of planktonic (E) and biofilm bacteria (F) at control sites and downstream of the aquacultures at the four sampling sites. Production of biofilm bacteria as a function of the fluorescence intensities (Fmax values, Raman units) of tryptophan-like (G) and tyrosine-like (H) compounds.
