Table 2 Pearson’s correlation coefficients (r) between hydraulic traits and species bioclimatic affiliation for the canopy-tree species sampled in French Guiana. Bivariate comparisons were applied using species means for each variable, with n varying from 18 to 26 species. r values are shown in bold type when significant (p < 0.05). Abbreviations are as follows: a_x (MPa⁻¹) represents the slope of the vulnerability curve; Ψ_12, Ψ_{50, and} Ψ₈₈ (MPa) represent the water potential at 12, 50, and 88% of branch embolism, respectively; Ψ_md (MPa) represents midday leaf water potential measured in 2018; π_tlp (MPa) represents leaf turgor loss point; HSM_Ψmd-Ψ50 and HSM_πtlp-Ψ50 (MPa) represent the hydraulic safety margins calculated as the difference between Ψ_md or πtlp and Ψ₅₀; SMleaf represents the leaf safety margin calculated as the difference between Ψ_md and π_tlp

From: Large hydraulic safety margins protect Neotropical canopy rainforest tree species against hydraulic failure during drought