Fig. 5

Map with the site-specific biocontamination index (SBCI) (Arbačiauskas et al. 2008) for the sampling sites situated in a Nieuwpoort, b Ostend and c Zeebrugge-Blankenberge. SBCI classes: 0 (no biocontamination), 1 (low biocontamination), 2 (moderate biocontamination), 3 (high biocontamination) and 4 (severe biocontamination)