In the 2008 paper, “Predicting natural mortality rates of plants and animals” in Ecology Letters, 11, 710–716, data for a small number of fish and invertebrate species were inadvertently misreported. This mistake does not change the overall patterns observed, or the conclusions of the paper. It does, however, have minor effects on the parameter estimates. Here we present the corrected figures (Figs 1, 2a,b, and 3) and statistical results. We also have corrected the online supporting information table—Appendix S1.
Prediction 1: For both fish and invertebrates, the natural logarithm of mass-corrected natural mortality rate is significantly negatively correlated with inverse absolute temperature. The common slope estimated for the two groups gives activation energy of -0.69 eV (95% CI = −0.78 to −0.60 eV), which is close to the predicted value of −0.65 eV (Table 1; Fig. 1). Fitting the data with the predicted slope of −0.65 explains 35% of the variation in body mass-corrected natural mortality for the pooled data and 45% and 17% of the variation in for fish and invertebrates respectively.
|Independent variable||Groups||Predicted Slope||Fixed Slope Intercept||Fitted Slope||Fitted Intercept|
|Temperature, (1/k [1/T-1/T20oC])||Fish||−0.65||0.58(0.45 to 0.72)||−0.83(−0.95 to −0.72)||0.74(0.56 to 0.91)|
|Invertebrates||−0.65||0.23(0.07 to 0.39)||−0.47(−0.76 to −0.18)||0.02(−0.42 to 0.47)|
|Body mass ln(m)||Fish||−0.25||0.58(0.45 to 0.72)||−0.27 (−0.35 to −0.20)||0.72(0.34 to 1.09)|
|Invertebrates||−0.25||0.23(0.07 to 0.39)||−0.18 (−0.24 to −0.12)||0.45(0.16 to 0.76)|
Prediction 2: The natural logarithm of the temperature-corrected mortality rate for all plants and animals (pooled) is negatively correlated with the natural logarithm of body mass (Regression: F = 3761, P < 0.0001), with a fitted slope (−0.22, 95% CI = −0.23 to –0.21) that is very close to the predicted value of –0.25 (Fig. 2a,b and Fig. 3). Moreover, the model, assuming a slope of −1/4 explains 63% of the variation in natural mortality rates for the pooled data. Within taxonomic groups, the slopes for fish and invertebrates are changed from those reported in McCoy and Gillooly (2008) but fall within the range of −0.18 to −0.27 (Table 1). The model, assuming a slope of −1/4 explains 36% and 46% of variation in natural mortality rates for fish and invertebrates respectively.