Time courses for the
abundance of populations of Culex
pipiens larvae in the absence of the competitor Daphnia
magna (A) and in the presence of the competitor Daphnia
magna (B) and the biomass of Daphnia in
the presence of Culex pipiens (C), presented as the
mean values between two successive pesticide pulses. Biomass of Daphnia is shown as measure for competition strength. Test
organisms were exposed to five successive pulses of different thiacloprid
concentrations at days 25, 67, 144, 214, and 277 for (A) and at days
25, 81, 144, 214, and 277 for (B and C). Asterisks indicate a significant
difference from the control (p < 0.05, ANOVA followed
by a Dunnett’s post hoc multiple-comparison test).