Fig. 2: Changes in the thermal environment drive body size evolution in Liolaemus lizards. | Nature Communications

Fig. 2: Changes in the thermal environment drive body size evolution in Liolaemus lizards.

From: Viviparity imparts a macroevolutionary signature of ecological opportunity in the body size of female Liolaemus lizards

Fig. 2

a Average of the five best-fitting models show that viviparity has an indirect effect (through its association with mean annual temperature (MAT)) on the body size of Liolaemus lizards. Solid arrows (and asterisk) represent significant associations and dashed arrows denote relationships that were not significant. Thicker arrows indicate stronger effects. Within parentheses we show the confidence interval of each association. This average model was supported from a Phylogenetic Path analysis (Supplementary Table 10), and the confidence intervals were obtained from 500 bootstrap replicates. b At lower environmental temperatures, Liolaemus lizards tend to be larger. Viviparous species (purple) are larger and common in colder habitats than their oviparous (green) counterparts. Solid line represents evolutionary regression (log10 body size = −0.0048*MAT + 1.8316, n = 132) and dashed line represents optimal regression (log10 body size = −0.0072*MAT + 1.8316, n = 132). Both regressions (evolutionary and optimal) were simultaneously estimated in an Ornstein-Uhlenbeck framework (Supplementary Table 11). Source data are provided as a Source Data file.

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