Summary of environmental data and thermal sensitivity of limpets from Rothera (Nacella concinna), Dunedin New Zealand (Cellana ornata), Melbourne Australia (C. tramoserica) and Singapore (C. radiata).

Warming tolerance, WT = CTmax-Thab, where Thab is the mean maximum daily logger temperature or mean maximum surface seawater temperature. Thermal safety margin, TSM = Topt-Thab, where Thab is the same as for WT (after Deutsch et al., 2008). Topt, the temperature of maximum tenacity and CTmax, the upper temperature at which tenacity had dropped to 50%, were taken from Table 2.†Indicates that the lower limit for functional mortality (LTL) was below the freezing point of seawater.