Fig. 4. Modulation of the imprint of tree species on SOC by site properties.

The Euler diagrams present the relative importance of factors (and some of their interactions) in explaining the SOC pool. The model used an integrative index of the Plant Economics Spectrum (PES) as predictor (see Methods), which enabled to include a large dataset of sites worldwide but at the expense of the level of variance explained (see Supplementary Table S2 for results with original values from a smaller set of sites). The model was run with (A), or without (B), the past land-use information (see Methods). PLU = past land-use (classed as “agriculture” or “forest”; see Supplementary Fig. S11).