Figure 5. Contribution of Tleaf and Tcrit to thermal safety margins (TSMcrit-leaf) of four tropical tree species grown under common environmental conditions. Points represent plant-level averages of each variable and lines represent linear regressions. In each panel, Tleaf data are represented by circles for the individual points and solid lines for the regression, whereas Tcritdata are represented by triangles for the points and a dashed line for the regression.