3.2. Effect profiles
The sediment extracts were toxic to luminescent V. fischeri 30 minute EC50-values ranging from 0.03% to 9.4% (Table 2). Correlation analysis indicated a significant but weak negative association between individual metal concentrations and V. fischeri EC50-values and the significant correlation
coefficients were detected for Co (r= −0.38; p b 0.05), Fe (r = −0.48; p b 0.01), Pb (r=−0.46; p b 0.01) and Zn (r=−0.32; p b 0.05).