Fig. 6

Nutrient content in the above-ground tree biomass. The lines and shaded areas show the bias-corrected regression models with their respective 95% confidence intervals. The dots represent data derived from the QSMs. The plot shows the total nutrient content of the above-ground biomass, including calcium (yellow solid line, filled circles), nitrogen (orange short-dashed line, empty triangles), potassium (pink dot-dashed line, filled rectangles), magnesium (red long-dashed line, empty circles) and phosphorus (brown dotted line, filled triangles)