Fig. 1

Conceptual figure of the study design and map of the site location in the Afromontane grasslands of the Maloti-Drakensberg escarpment. The study was carried out in the Free State and KwaZulu-Natal Provinces, South Africa. The study area follows an elevation gradient with five sites from 2,000-2,800 meters above sea level (m a.s.l), with five 1.2 × 1.2 m plots each on the east- and west-facing aspects of the ridge per elevation. At the 3,064 m a.s.l. RangeX site, we sampled from five 1 × 1 m plots in extant climate and five in experimentally warmed plots inside OTCs. The inset map shows the elevation profile of the Maloti-Drakensberg grasslands with the study site indicated, and the location of the Maloti-Drakensberg within South Africa159,160.