Fig. 5.

Effect plots of the GLMM showing the interaction between soil OC and NDVI and its influence on Hg distribution. The OC predictor effect plot (left) shows the relation between Hg concentrations and the concentration of soil OC and the lines colour depicts the value of the yearly cumulative NDVI subdivided in 10 quantiles. OC concentrations are in g.kg-1; NDVI yearly cumulative value is divided in 10 quantiles, with the numbers between parenthesis representing the interval of the quantile. The qNDVI predictor effect plot (right) depicts the change of Hg with the change of NDVI for different levels of SOC.