3.1 Lizard body sizes relationships with altitude
We found that the environmental conditions significantly vary across altitude, with high altitudes characterized by limited resources, colder and drier climatic conditions, and less seasonal change compared to low altitudes with more resources, warmer and wetter climatic conditions, and high seasonality (Table 1; Table S1). We found strong evidence that altitude explained variation in body size across populations (𝝌2 = 20.756 p <0.0001; Fig. 2). Post hoc comparisons showed that female lizards occupying low altitudes (<1,000m) had larger body sizes than female lizards occupying mid (1,000–2,000m) or high (>2000m) altitudes (Table 2).