Figure 1.

Survival of juvenile mussels after exposure to three heat stress temperatures in the one-month experiment. Mussels from each of four origin sites were assayed for thermal tolerance following four treatments (electronic supplementary material, figure S2). Field-acclimatized mussels from the high sites were not tested at 35.8°C. Points are horizontally staggered to aid in interpretation. The proportion alive on day 7 is the y-axis for all panels. ‘High’ and ‘low’ height on shore refer to the top and bottom row of panels, respectively.