Hillebrand, H, Donohue, I, Harpole, WS, Hodapp, D, Kucera, M, Lewandowska, AM, Merder, J, Montoya, JM and Freund, JA (2020) Thresholds for ecological responses to global change do not emerge from empirical data. Nature Ecology & Evolution. doi:10.1038/s41559-020-1256-9