Table 3.

Principal component correlation matrixes for Quercus macrocarpa, Q. palustris, and Q. prinus seedlings in experiment 2.

Variable	Component
	Q. macrocarpa			Q. palustris		Q. prinus
	1	2	3	1	2	1	2	3
Height	0.74	−0.34	−0.38	0.83	−0.43	0.82	−0.02	0.03
Leaf area	0.85	−0.11	0.32	0.93	−0.19	0.85	0.47	0.08
Root area	0.83	0.36	−0.3	0.92	0.34	0.89	−0.32	0.16
Dry weight shoot	0.95	−0.07	0.04	0.97	−0.08	0.94	0.27	0.15
Root	0.88	0.31	−0.07	0.92	0.32	0.88	−0.23	0.33
Total plant	0.95	0.15	−0.02	0.97	0.14	0.96	0.08	0.23
Water use seedling⁻¹	0.84	0.13	0.32	0.86	−0.09	0.74	0.56	0.20
cm⁻¹ height	−0.37	0.66	0.65	−0.67	0.49	−0.66	0.35	0.27
cm⁻² leaf area	−0.62	0.53	−0.28	−0.83	0.39	−0.66	0.09	0.67
cm⁻² root area	−0.80	−0.24	0.05	−0.86	−0.10	−0.67	0.41	0.55
Shoot-to-root ratio	0.41	0.82	−0.34	0.23	0.88	−0.36	−0.70	0.55
Cumulative percent of total variation explained	62.0	78.3	86.8	71.5	86.2	62.7	76.8	88.5