Figure 1.

Interactions between night-time warming and simulated light pollution for the three predator treatments ((a) no predators, (b) Col. maculata and (c) Coc. septempunctata) shown by the numbers of aphids remaining at the end of the 9-day field experiment. Points give numbers from the four replicates per treatment, and in the Col. maculata and Coc. septempunctata panels the mean log₁₀ numbers of aphids from the no-predator controls are given by horizontal lines. Warming and light treatments had no effect on aphid density in the no-predator and Col. maculata treatments, but had significant individual and interactive effects in the presence of Coc. septempunctata. (C = control; W = warming treatment; L = light treatment). Statistics are presented in table 1.