Fig. 2. (a) Time-integrated thermal bleaching threshold curve for a hypothetical reef (after Berkelmans, 2002). Temperature and exposure time combinations to the right of
the thermal bleaching curve are predicted to induce a bleaching response (e.g. >3–5 days at 31.5 C). (b) Regional-scale variability in the upper thermal bleaching limits of the
inshore reefs of the GBR (after Berkelmans, 2002; Berkelmans, 2008).