Figure legends
Table 1; Summary results of univariate linear models showing the relationships between available resources (net primary productivity), annual mean precipitation, annual mean temperature, temperature seasonality or precipitation seasonality with altitudes.
Table 2; Results for pairwise contrasts of the linear model with log-transformed lizard body size (n = 432) and altitudinal gradients (low altitudes: <1,000m; mid altitudes: 1,000–2,000 m; high altitudes: >2,000 m asl). Reported degrees of freedom is for t statistics.
Table 3; Statistical parameters from linear mixed-effects models of body size patterns with seasonally available resources across different altitudes accounting for lizards’ population origins. Results presented are for the model with resource availability (net primary productivity), seasonality (temperature seasonality and precipitation seasonality), altitudes and the interaction between resource availability with altitudes as predictors.
Table 4; Statistical parameters from linear mixed-effects models of body size patterns with environmental conditions across different altitudes accounting for lizards’ population origins. Results presented are for the model with climatic conditions (annual mean temperature and annual mean precipitation), seasonality (temperature seasonality and precipitation seasonality), altitudes and the interaction between resource availability with altitudes as predictors
Figure 1; Map showing altitudinal gradients and collection sites of female Eremias argus lizards from different altitudes across China. Color gradients represent China’s altitudinal gradients in square meters, with colored points depicting the geographical locations across China occupied by female lizards in our study
Figure 2; Relationship between log-transformed body size of lizards with altitudinal clines across populations of lizards. Predicted values ± 1 SE of estimates from the linear regression model (n = 432) that account for population origins of lizards are shown by the connected dots.
Figure 3; The relationship between log-transformed lizard body size with (a) net primary productivity and seasonal precipitation along altitudinal clines; (b) net primary productivity and changes in seasonal temperature along altitudinal clines. Color gradient of points represents the changes in the pattern of log-transformed body size of lizards with seasonally available resources at different altitudes. Color gradient trendlines represent predicted values ± 1 SE of estimates from the linear regression model (n = 432 ) that accounts for the population origins of lizards. Separate coloured trendlines illustrate significant (P < 0.05) relationships between lizard body size seasonal available resources while single trendlines illustrate non-significant relationships between lizard body size seasonal available resources along altitudinal clines.
Figure 4; Relationship between lizard body sizes with a) annual mean temperature, b) annual mean precipitation, c) precipitation seasonality and d) temperature seasonality at different altitudes. Color gradient of points represents the changes in the pattern of log-transformed body size of lizards with climatic conditions at different altitudes. Color gradient trendlines represent predicted values ± 1 SE of estimates from the linear regression model (n = 432 ) that accounts for the population origins of lizards. Separate colored trendlines illustrate significant (P < 0.05)relationships between lizard body size with climatic conditions along altitudinal clines.