Acknowledgements
We gratefully acknowledge the immense effort and time that numerous professionals, field assistants, and students have contributed to the collection of these data. SH and ARB gratefully acknowledge the support of iDiv funded by the German Research Foundation (DFG–FZT 118, 202548816). JJL received a postdoctoral fellowship from the Research Foundation Flanders (FWO, grant nr. 12P1819N), and OG received a postdoctoral research fellowship through the Afromontane Research Unit, University of the Free State. The work from JJL, JC and IN is supported by a research grant from the FWO (grant nr. G018919N). KLS thanks funding received from PICT 2015-2072 and PIP 2014-0758. LAC and AP acknowledge support from FONDECYT 1171005, 1180205 and CONICYT PIA CCTE AFB170008. VS was supported by SENESCYT‐Ecuador, Instituto de Ecología y Biodiversidad (IEB) and Laboratorio de Ecología, Biogeografía y Sistemática (ECOBIOSIS) de la Universidad de Concepción, Laboratorio de Invasiones Biológicas (LIB) de la Universidad de Concepción, Herbario QCA and QCNE-Ecuador, Missouri Botanical Garden, and CONICYT (PFB‐023). MV was supported by a research grant from the BiodivClim Call 2019 (grant nr. TACR SS70010001) and together with JM by long-term research development project RVO 67985939 from the Czech Academy of Sciences. FE, BL and TV acknowledge funding by the Austrian Science Foundation FWF (grant I 3757-B29). PK acknowledges support from the Swedish Research Council (Vetenskåpsrådet) (project grant 2015-04214). BN was supported by the US Forest Service and direct mentorship from C. Parks. Fieldwork in the Northern Scandes is achieved using INTERACT Transnational Access funding. AM and VA were supported by the Universidad Nacional de Cuyo (SIIP 2019 UNCUYO) and the Rufford Foundation. JMA received funding from the European Commission Horizon 2020 research and innovation programme under grant agreement 678841. We also thank the Fondation Herbette, University of Lausanne, for financial support to JMA for the workshop “Distributed ecological observatories and long-term monitoring of mountain biodiversity” held in September 2019 that lead up to this paper.