Fig. 6

Chronic effects (21 d) on D. magna reproduction for the negative control (white), the eluates of three concentrations (1, 10 and 100 mg/L) of each of the three test materials (blue colors) and the positive control (potassium dichromate; orange colors) as boxplots. Boxes depict the lower and upper quartile as well as the median; whiskers show the standard deviation of mean of n = 10 replicates and dots represent outliers. Effects were calculated in comparison to the mean number of offspring in the negative control and positive effect values show reproduction stimulation, while negative values show reproduction inhibition. Asterisks denote significant differences between the treatments and the negative control (Dunn´s test: *: p < 0.05, **: p < 0.01)