Fig. 1

Juveniles per capita (a) and body length [µm] (b) in the nematode bioassay. Caenorhabditis elegans was incubated for different exposure times with Polycelis tenuis in the presence or absence of Escherichia coli, as well as in a sediment setup (a N = 7 per time point and treatment; b N = 1629). Green points in a indicate protozoans. The data are presented in box-whisker plots (b); the median is indicated by the horizontal line, and the mean by the green rhombus (b). The boxes show the interquartile range, and the whiskers either the 5% or 95% percentile. In addition to the actual data, the fit obtained with linear mixed effect models (LMMs) is shown together with the 95% confidence interval (a R²c = 0.06; b R²c = 0.42)