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Table 1 Key branch and leaf hydraulic traits. Water potential at 50% loss of branch hydraulic conductivity (Ψ50; MPa), midday leaf water potential during a normal-intensity dry season (Ψmd; MPa), leaf water potential at turgor loss point (πtlp; MPa), xylem hydraulic safety margins (HSM; MPa), and leaf safety margin (SMleaf; MPa) derived from leaf and branch hydraulic traits for the 30 canopy-tree species sampled in French Guiana. The results of a one-way ANOVA test for species effect for each studied trait are shown. Mean ± SE, F, and p values of species comparison are displayed. Only species with at least three measured individuals are included in the analysis. Correspondance between species’ code and botanical name can be found in Table 3.

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

Code

Ψ50

Ψmd

Ï€tlp

HSMΨmd-Ψ50

HSMπtlp-Ψ50

SMleaf

Bp

− 4.29 ± 0.23

− 1.74 ± 0.28

− 1.82 ± 0.05

2.65 ± 0.54

2.51 ± 0.28

0.10 ± 0.31

Csch

− 2.43 ± 0.28

− 1.16 ± 0.09

− 1.54 ± 0.05

1.29 ± 0.34

0.82 ± 0.29

0.44 ± 0.08

Cpri

-

− 1.37 ± 0.18

− 2.15 ± 0.12

-

-

0.78 ± 0.24

Csan

− 4.05 ± 0.04

− 1.60 ± 0.24

− 1.80 ± 0.05

2.45 ± 0.24

2.27 ± 0.05

0.18 ± 0.24

Dg

− 2.38 ± 0.13

− 1.36 ± 0.15

− 1.32 ± 0.05

1.03 ± 0.31

1.09 ± 0.17

− 0.01 ± 0.17

Ef

− 3.86 ± 0.55

− 1.29 ± 0.16

− 1.68 ± 0.05

2.53 ± 0.59

2.02 ± 0.71

0.30 ± 0.21

Eg

− 6.14 ± 0.11

− 1.29 ± 0.22

− 1.93 ± 0.05

4.86 ± 0.31

4.21 ± 0.10

0.65 ± 0.30

Ec

− 3.27

− 0.94

− 1.57

2.33

1.70

0.63

Es

− 2.88 ± 0.12

− 1.23 ± 0.17

− 1.52 ± 0.05

1.65 ± 0.19

1.29 ± 0.13

0.47 ± 0.20

Gg

− 4.99 ± 0.34

− 1.04 ± 0.22

− 1.92 ± 0.11

3.96 ± 0.24

3.05 ± 0.40

0.91 ± 0.29

Gh

− 7.63 ± 0.14

− 0.90 ± 0.11

− 1.98 ± 0.08

6.73 ± 0.10

5.64 ± 0.03

1.10 ± 0.11

Is

− 3.69

− 1.63 ± 0.17

− 1.54 ± 0.03

-

2.11

− 0.10 ± 0.22

Lper

− 3.58 ± 0.36

− 1.38 ± 0.23

− 1.82 ± 0.07

2.30 ± 0.28

1.77 ± 0.28

0.46 ± 0.17

Lpoi

− 2.14 ± 0.31

− 1.82 ± 0.07

− 2.14 ± 0.12

0.33 ± 0.32

− 0.09 ± 0.36

0.42 ± 0.07

La

-

− 1.28 ± 0.11

− 1.69 ± 0.03

-

-

0.41 ± 0.10

Lh

-

− 1.12 ± 0.24

− 1.45 ± 0.06

-

-

0.33 ± 0.25

Lm

− 2.97 ± 0.32

− 1.65 ± 0.24

− 1.76 ± 0.05

1.31 ± 0.43

1.18 ± 0.27

0.13 ± 0.23

Mb

− 6.87 ± 0.62

− 1.86 ± 0.25

− 2.07 ± 0.04

5.38 ± 0.58

4.75 ± 0.62

0.22 ± 0.18

Mc

− 2.97

− 1.69 ± 0.16

− 1.66 ± 0.02

1.44

1.29

− 0.03 ± 0.18

Pc

− 6.25 ± 0.51

− 2.25 ± 0.27

− 1.72 ± 0.05

3.19 ± 0.49

4.49 ± 0.48

− 0.58 ± 0.27

Po

− 2.41 ± 0.15

− 2.01 ± 0.55

− 1.98 ± 0.08

0.40 ± 0.66

0.35 ± 0.26

0.05 ± 0.50

Psag

− 4.94

-

-

-

-

-

Psub

− 2.93

− 1.93 ± 0.08

− 2.08 ± 0.06

0.96

0.71

0.15 ± 0.12

Qr

− 1.86 ± 0.18

− 1.23 ± 0.39

-

0.46 ± 0.42

-

-

Rs

− 4.13

− 1.61 ± 0.48

− 1.70 ± 0.12

1.64

2.19

0.02 ± 0.33

Sr

-

− 1.30 ± 0.14

− 1.49 ± 0.07

-

-

0.14 ± 0.19

Sg

− 2.09 ± 0.12

− 1.15 ± 0.08

− 1.58 ± 0.02

1.00 ± 0.08

0.50 ± 0.12

0.43 ± 0.09

Tm

− 4.13 ± 0.17

− 1.82 ± 0.29

− 1.75 ± 0.04

2.31 ± 0.32

2.39 ± 0.18

− 0.08 ± 0.26

Vm

− 5.27 ± 0.30

− 0.88 ± 0.19

− 1.62 ± 0.03

4.38 ± 0.40

3.64 ± 0.31

0.74 ± 0.17

Va

-

− 1.90 ± 0.16

− 1.94 ± 0.05

-

-

0.05 ± 0.17

All

− 3.93 ± 0.31

− 1.46 ± 0.07

− 1.75 ± 0.04

2.37 ± 0.35

2.17 ± 0.32

0.30 ± 0.01

F

28.0

2.4

12.1

19.4

22.6

1.9

p

< 0.001

0.002

< 0.001

< 0.001

< 0.001

0.02