Fig. 7
Relationships between Ψ50, the water potential at 50% loss of branch hydraulic conductivity (Ψ50; MPa), and midday leaf water potential measured during the severe dry season of 2008 (Ψmd; MPa) for 10 canopy-tree species sampled in French Guiana (black n ≥ 3; gray n < 3). All error bars represent standard errors of the mean. The 1:1 line (dashed line) is represented. Coefficients of determination (R2) and significance levels (p) are shown