marginally significantP < 0.07
However, we found a significant site * treatment (χ 2 = 13.1, df = 2, P = 0.001), treatment * species (χ 2 = 18.36, df = 1, P < 0.001) and a marginally significant site * treatment * species interaction (χ 2 = 5.34, df = 2, P < 0.07; Fig. 2 ).