Comparison with data from other tropical sites

The thermotolerance data gathered in the study presented here was compared with published data for adult tropical evergreen trees from other sites, i.e. excluding seedling/greenhouse studies. The final compilation includes data from 106 species occurring in nine tropical sites (Table 1). Some of these studies determined thermotolerance using the Tcrit parameter derived from theF0 rise approach and others usedT50 derived from the Fv/Fm approach used in this study. Data for each of these two metrics were treated separately in our analyses. Based on climatological records from CRU (Osborn & Jones, 2014), we classified the season during the sample collection period as ‘hot’ (three hottest months of the year) and ‘cool’ (three coldest months of the year). Similarly, from the precipitation data, we treated the sampling period that took place during the months with rainfall < 100 mm as ‘dry’ and periods above 100 mm as ‘wet’. Hence, the classification of ‘dry’ is only a relative description of the site’s precipitation status and does not necessarily indicate no precipitation. Data points for aseasonal sites such as Iquitos were classified as ‘wet’. Details of the forest regions and study sites can be found in Supporting Information Table S2. The MuMIn package (Bartoń, 2018) was used to extract conditional pseudo R2 for the complete model fits.