marginally significantp = .047
The individual effect of colony size emerged as marginally significant ( χ 2 = 3.95, p = .047), with slightly lower host δ 13 C values in juveniles (−16.3‰ ± 0.9‰) than in adults (−16.0‰ ± 0.9‰) (Figure 3b ); this was driven by lower host δ 13 C in juvenile Stylophora (−16.7‰ ± 0.7‰) than in adults (−16.0‰ ± 0.3‰) at Lizard Island before the heatwave.