Fig. 2

Principal component analysis scatter-plot, representing the multidimensional niche opposing the sites of presence and absence. The ellipsoids represented the 95% confidence intervals. Blue triangles, presence; orange circles, absence. Explained variance PC₁ = 11.02%, PC₂ = 9.24%, PC₃ = 7.89%. To improve clarity, it is shown only these variables with the highest absolute loadings: ACT (aciculifolious tree), ELE (elevation, masl), PEG (perennial grass), PEL (perennial liana), TMA (maximum temperature of the month of July, °C)