Acknowledgements

We thank the members of the EcoNetLab for helpful discussions. GA was supported by the International Research Training Group TreeDì funded by the German Research Foundation (DFG; GRK 2324/1 - 2018 (P9), 319936945). ET was supported by the Agence Nationale de la Recherche (ANR-17-CE32-0002/ECOSTAB). SW was supported by the National Natural Science Foundation of China (31988102). GA, BG, RR and UB gratefully acknowledge the support of iDiv funded by the German Research Foundation (DFG–FZT 118, 202548816).