Table 8 Mean values and standard error (SE) of midday leaf water potential (Ψ_md; MPa) measured during the severe 2008 dry season (Ψ_md; MPa; Stahl et al. 2010), the driest in the past decade (Aguilos et al. 2019), and the second driest in the past four decades. Results are shown for the 12 canopy-tree species sampled at the same site in French Guiana in 2008 that are common to our study. Xylem hydraulic safety margins computed from embolism resistance traits (HSM_Ψmd-Ψx) or leaf safety margins computed from leaf turgor loss point measured in 2018 (SM_leaf) are also shown

Bp

3

− 2.08 ± 0.26

1.27

2.21

− 0.26

Csan

5

− 2.55 ± 0.18

1.06

1.50

− 0.75

Dg

4

− 1.74 ± 0.09

− 0.39

0.64

− 0.42

Ef

5

− 1.93 ± 0.14

0.90

1.93

− 0.25

Ec

4

− 2.09 ± 0.12

0.97

1.18

− 0.52

Es

4

− 1.74 ± 0.04

0.82

1.14

− 0.22

Gg

1

− 2.60

0.80

2.39

− 0.68

Lh

2

− 1.58 ± 0.33

-

-

-0.13

Lm

5

− 2.21 ± 0.12

− 0.80

0.76

− 0.45

Rs

2

− 2.13 ± 0.02

0.82

2.01

− 0.43

Sg

5

− 1.57 ± 0.12

0.07

0.52

0.01

Va

10

− 3.03 ± 0.08

-

-

− 1.09

All

-

− 2.10 ± 0.13

0.55 ± 0.22

1.43 ± 0.22

− 0.43 ± 0.09

F

-

18

-

-

-

p

-

< 0.001

-

-

-