Change in <i>Symbiodinium</i> D∶C cell ratios (±1 SE) over time in <i>Acropora millepora</i> juveniles at 28, 30, or 31°C in: (a) high light (390 µmol photons m⁻² s⁻¹), or (b) low light levels (180 µmol photons m⁻² s⁻¹).

<p>Dotted line represents equal proportions of <i>Symbiodinium</i> types D and C cells within the juveniles. Ratios closer to 1 are dominated by type D; ratios closer to 0 are dominated by type C. N = 10 per data point.