Appendix S1. Information on organisms, experimental set-up and biomass determination.

Appendix S2. Fitted parameters for the statistical models.

Appendix S3. R2 and the Akaike Information Criterion (AIC) of models used for both experiments.

Appendix S4. Decomposition rates in control vs. faunal treatments.

Appendix S5. Summary of the statistical analysis with worked example. Instructions for the analysis of the “richness” experiment (response leaf mass loss only).

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