. 2015 Apr 2;10(4):e0121004. doi: 10.1371/journal.pone.0121004

Table 3. A Two- way ANCOVA of individual species with water (W, df = 1) and light (L, df = 1) as main factors and relative growth rate (RGR), biomass allocation, morphological and leaf physiological traits as dependent variables.

Species	Factor	RGR	LMF	SMF	SSL	SLPM	RMF	SRL	RLPM	g	LWP
Entandrophragma angolense	PDM	ND	1.09	5.31^*	181.90^***	344.22^***	0.99^*	0.16	4.68^*	ND	ND
	Light	21.90^***	8.45^**	0.56	0.20	2.09	10.88^**	2.16	0.15
	Water	5.59^*	4.99^*	0.74	0.52	0.33	1.56	0.242	0.01
	L x W	5.17^*	0.33	3.27	1.34	3.28	0.58	1.02	2.99
Turraeanthus africanus	PDM	ND	11.29^***	4.68^*	29.22^***	86.97^***	2.52	2.25	5.60^*	ND	ND
	Light	2.84	53.35^***	8.46^**	29.19^***	0.99	18.01^***	9.10^**	0.87	9.73^**	5.80^*
	Water	0.01	9.9^**	18.01^***	3.30	19.15^**	0.08	7.76^**	7.99^**	18.01^***	18.01^***
	L x W	0.98	0.12	0.08	3.944^*	0.07	2.73	0.80	0.00	0.08	0.08
Piptadeniastrum africanum	PDM	ND	1.03	0.04	169.03^***	211.75^***	1.44	36.27^***	38.79^***	ND	ND
	Light	17.99^***	2.83	2.70	11.46^**	2.71	0.68	2.814	1.60	7.42^*	0.13
	Water	20.95^***	8.72^**	0.90	15.30^***	9.81^**	14.24^***	1.11	5.25^*	95.24^***	49.00^***
	L x W	0.21	0.01	1.01	0.03	3.39	0.54	0.33	1.52	1.26	1.53
Ceiba pentandra	PDM	ND	0.05	1.04	126.92^***	131.80^***	2.5	10.55^**	12.36^**	ND	ND
	Light	13.71^***	19.6^***	2.69	50.43^***	33.89^***	23.3^***	4.10^*	5.52^*
	Water	141.52^***	6.91^*	7.43^**	2.73	3.94^*	0.17	0.08	0.37
	L x W	1.39	0.08	1.47	5.80^*	0.21	0.96	0.70	1.71
Albizia zygia	PDM	ND	0.01	8.30	135.16^***	171^***	2.17	62.76^***	41.15^***	ND	ND
	Light	13.84^***	0.77	0.01	8.08^**	5.72^*	1.15	0.03	0.01	11.79^**	0.57
	Water	0.57	0.21	3.10	18.75^***	3.15	1.56	37.26^***	44.54^***	160.85^***	9.38^**
	L x W	6.42	5.67^*	0.36	0.76	1.92	7.40^**	1.01	0.41	5.91^*	4.24^*
Pericopsis elata	PDM	ND	3.42	2.46	116.70^***	451^***	0.13	0.18	0.07	ND	ND
	Light	8.99^**	0.76	0.99	5.55^*	7.69^**	0.29	2.84	3.85^*	5.44^*	4.46^*
	Water	19.47^***	0.71	1.79	8.92^**	7.14^*	8.63^**	1.34	6.34^*	279.28^***	695.69^***
	L x W	8.55^**	7.30 ^**	4.50^*	1.20	3.64	0.23	1.30	0.74	7.26^*	20.98^***
Sterculia rhinopetala	PDM	ND	2.00	0.55	101.76^***	145.01^***	6.26^*	25.39^**	11.07^**	ND	ND
	Light	6.92^*	2.71	1.29	8.29^**	1.60	1.29	3.40	1.36	1.31	3.95
	Water	7.07^*	1.24	4.41^*	15.80^**	1.47	13.12^**	0.92	5.19^*	239.20^***	5.41^**
	L x W	0.79	0.02	0.25	2.08	9.71^**	1.49	1.32	5.32^*	0.13	0.36
(Pouteria aningeri)	PDM	ND	2.17	0.41	88.93^***	99.77^***	2.01	1.91	0.36	ND	ND
	Light	9.23^**	0.70	0.52	0.73	0.00	0.19	1.24	0.88	89.14^***	62.89^***
	Water	13.76^***	0.32	1.73	1.28	0.15	0.34	0.05	0.05	73.44	26.28^***
	L x W	0.21	6.09^*	2.80	1.17	2.47	3.41	0.33	0.26	5.14^*	1.89
Antiaris toxicaria	PDM	ND	1.55	0.89	165.47^***	204.09^***	0.19	10.79^**	15.47^***	ND	ND
	Light	27.51^***	0.97	11.65^***	0.70	13.10^***	6.94^*	2.29	0.08
	Water	8.71^**	1.82	6.35^*	0.47	6.45^*	6.29^*	1.38	0.03
	L x W	0.21	0.10	0.19	0.13	0.28	0.03	1.35	2.32
Strombosia pustulata	PDM	ND	2.72	0.95	47^***	88.52^***	6.99^*	2.16	9.12^**	ND	ND
	Light	27.49^***	7.52^**	0.35	1.54	1.22	7.34^**	0.07	1.67
	Water	23.05^***	12.29^**	3.96^*	4.98^*	0.34	6.31^*	2.21	8.84^**
	L x W	6.21^*	0.63	0.133	0.20	0.04	0.27	0.47	0.18
Total number of light x water interactions		3	3	1	2	1	1	0	1	3	2

Plant dry mass (PDM) was included in the ANCOVA as a covariate for all variables but RGR. F-values and significance levels are shown.

*:p ≤ 0.05

**: p ≤ 0.01

***: p ≤ 0.001

ND = not determined. Leaf mass fraction (LMF), stem mass fraction (SMF) and root mass fraction (RMF) were arcsine transformed and all other traits were log₁₀ transformed prior to analysis. SSL = specific stem length, SLPM = stem length per unit plant mass, SRL = specific root length, RLPM = root length per unit plant mass, g = stomatal conductance, LWP = Leaf water potential.