Table 4.

Pearson’s correlation coefficients for leaf traits, growth, photosynthesis, stomatal conductance, and fluorescence among all trees on August 24, 2015 (=dry).

Blue	SLA	dia gr	A	PNUE	g_s	C_i	Fv’/Fm’	ΦPSII
N	0.93^***	0.46	0.25	0.62	0.34	0.52	−0.31	0.28
SLA		0.31	−0.04	0.23	0.17	0.71	−0.40	−0.08
dia gr			−0.31	0.25	−0.39	−0.10	−0.62	0.33
A				0.60	0.92^**	0.21	0.60	0.60
PNUE					0.40	−0.10	−0.19	0.66
g_s						0.56	0.70	0.30
C_i							0.29	−0.31
Fv’/Fm’								−0.06

White
N	0.99^***	−0.58	0.06	0.14	−0.31	−0.25	0.24	−0.15
SLA		−0.54	0.12	0.13	−0.23	−0.28	0.32	−0.14
dia gr			0.52	0.47	0.70	−0.29	0.30	0.51
A				0.15	0.53	−0.92^**	0.33	0.63
PNUE					0.29	−0.04	0.08	0.15
g_s						−0.17	0.47	0.07
C_i							−0.24	−0.68
Fv’/Fm’								−0.10

Green
N	0.99^***	−0.12	−0.39	0.06	−0.26	0.06	0.32	0.16
SLA		−0.20	−0.39	0.03	−0.31	−0.03	0.29	0.21
dia gr			−0.09	−0.01	0.46	0.77^*	−0.19	−0.66
A				0.84^**	0.73^*	0.12	0.61	0.47
PNUE					0.75^*	0.29	0.80^*	0.43
g_s						0.75^*	0.44	−0.08
C_i							0.07	−0.46
Fv’/Fm’								0.32

Black
N	0.98^***	−0.40	−0.50	−0.33	−0.59	−0.17	−0.68	−0.57
SLA		−0.31	−0.73	−0.59	−0.77^*	−0.39	−0.67	−0.78^*
dia gr			−0.60	−0.42	−0.47	−0.36	0.48	−0.51
A				0.84^*	0.97^***	0.75	0.31	0.91^**
PNUE					0.85^*	0.86^*	0.56	0.58
g_s						0.87^*	0.39	0.88^**
C_i							0.28	0.44
Fv’/Fm’								0.15

Man × Black
N	0.67	−0.31	−0.48	−0.21	−0.34	−0.60	0.04	−0.02
SLA		−0.09	0.03	0.17	−0.10	−0.43	0.43	0.57
dia gr			0.65	0.41	0.61	0.67	−0.30	0.36
A				0.78^*	0.88^**	0.77^*	0.47	0.59
PNUE					0.93^**	0.78^*	0.72	0.31
g_s						0.90^**	0.50	0.30
C_i							0.21	0.12
Fv’/Fm’								0.20

Manchurian
N	0.83^**	0.74^*	0.65	0.80^*	0.34	−0.23	−0.20	0.67
SLA		0.43	0.27	0.61	0.01	−0.30	0.12	0.28
dia gr			0.71^*	0.79^*	0.64	0.10	0.13	0.48
A				0.86^**	0.61	−0.19	−0.40	0.70
PNUE					0.68	−0.04	−0.08	0.51
g_s						0.63	−0.10	0.40
C_i							0.22	−0.09
Fv’/Fm’								−0.74^*

↵*P < 0.05,
↵**P < 0.01,
↵***P < 0.001; N = leaf nitrogen (μmol mol⁻² s⁻¹); SLA = specific leaf area (m²g⁻¹); dia gr = diameter growth in 2015 (cm); A = net assimilation rate (μmol m⁻² s⁻¹); g_s = stomatal conductance (mol m⁻² s⁻¹); PNUE = photosynthetic nitrogen use efficiency (μmol mol⁻² s⁻¹); C_i = intercellular CO₂ (μmol mol⁻¹); Fv’/Fm’ = light-adapted variable fluorescence; ΦPSII = fraction of absorbed photons used by photosystem II.