Table 5.

Pearson’s correlation coefficients for leaf traits, growth, photosynthesis, stomatal conductance, and fluorescence among all trees on September 7, 2015 (=dry).

Blue	SLA	dia gr	A	PNUE	g_s	C_i	Fv’/Fm’	ΦPSII
N	0.93***	0.46	0.31	−0.34	0.24	−0.07	0.03	−0.02
SLA		0.31	−0.01	−0.58	−0.08	−0.30	−0.27	−0.21
dia gr			0.64	0.33	0.39	−0.11	0.50	0.68
A				0.76*	0.92**	0.62	0.93***	0.74*
PNUE					0.68	0.54	0.88**	0.81*
g_s						0.85**	0.87**	0.48
C_i							0.66	0.13
Fv’/Fm’								0.71*

White
N	0.99***	−0.58	0.16	−0.77*	0.62	0.45	0.59	0.50
SLA		−0.54	0.12	−0.79*	0.63	0.48	0.64	0.45
dia gr			−0.54	0.10	−0.48	−0.15	−0.32	−0.78*
A				0.39	0.49	−0.17	0.03	0.80*
PNUE					−0.31	−0.48	−0.63	0.10
g_s						0.74*	0.56	0.40
C_i							0.42	−0.19
Fv’/Fm’								0.18

Green
N	0.99***	−0.12	−0.18	−0.78*	−0.03	0.24	−0.11	0.14
SLA		−0.20	−0.26	−0.81*	−0.06	0.33	−0.15	0.06
dia gr			0.73*	0.57	0.35	−0.53	0.22	0.64
A				0.70	0.79*	−0.22	0.80*	0.80*
PNUE					0.52	−0.20	0.50	0.38
g_s						0.40	0.76*	0.48
C_i							0.07	−0.38
Fv’/Fm’								0.65

Black
N	0.98***	−0.40	0.12	−0.50	0.20	0.29	−0.16	0.08
SLA		−0.31	0.03	−0.57	0.10	0.22	−0.16	−0.07
dia gr			0.08	0.30	0.11	0.28	0.08	0.12
A				0.75*	0.99***	−0.03	0.09	0.92**
PNUE					0.69	−0.22	0.20	0.71*
g_s						0.13	0.11	0.91**
C_i							0.14	0.03
Fv’/Fm’								−0.20

Man × Black
N	0.67	−0.31	−0.43	−0.67	−0.19	0.21	−0.02	−0.14
SLA		−0.09	−0.16	−0.39	0.44	0.68	−0.17	0.11
dia gr			−0.19	−0.14	−0.09	−0.08	−0.35	−0.58
A				0.94**	0.85**	0.13	0.26	0.74*
PNUE					0.57	−0.29	0.14	0.70
g_s						0.58	0.23	0.55
C_i							−0.14	0.18
Fv’/Fm’								−0.04

Manchurian
N	0.83**	0.74*	0.64	0.51	0.47	−0.72*	0.56	0.62
SLA		0.43	0.50	0.40	0.36	−0.67	0.71*	0.26
dia gr			0.72*	0.62	0.51	−0.71*	0.47	0.73*
A				0.98***	0.95***	−0.75*	0.70	0.88**
PNUE					0.96***	−0.70	0.67	0.87**
g_s						−0.52	0.65	0.82*
C_i							−0.57	−0.66
Fv’/Fm’								0.38

*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.