Figure 5
Relative contribution and Pearson’s correlations of climate factors as drivers of soil total P in different soil layers (a–e). Results from random forest analyses aiming to identify the main temperature and precipitation predictors of soil total P concentration. The increase in the mean square error (MSE, %) is displayed along the x-axes. Pearson’s correlations (green font) indicate the relationships between 19 bioclimatic variables and soil total P in the different soil layers [0–10 cm (a), 10–20 cm (b), 20–30 cm (c) 30–50 cm (d), and 50–100 cm (e)]. *, p < 0.05; **p < 0.01; **p < 0.001.
