Fig. 2: Relationship between community temperature index (CTI) and mean annual temperature.

Coloured lines show regression relationships within each site, and the black line shows the regression relationship across all sites (n = 17 independent sampling plots). Both metrics of community temperature index were positively correlated with mean annual temperature (Spearman’s rank correlation: CTIStem, rs = 0.945, df = 15, P < 0.001, CTIBA, rs = 0.942, df = 15, P < 0.001), KIG Kigezi Highlands in Uganda, VIR Virunga Mountains in Rwanda-Uganda, UDZ Udzungwa Mountains in Tanzania. Source data are provided as a source data file.