Recent growth changes in Western European forests are driven by climate warming and structured across tree species climatic habitats

Table 6 Parameter estimates and summary statistics for the linear regression models of stand BAI against RDI (relative stand density) and H ₀ (top height) for the eight species under study

Species	Intercept (m²/ha/5 years)			ln(RDI)			ln(H₀)			1/H₀ (m⁻¹)			Adj.R ² (%)	RSE (m²/ha/5 years)
Species	Estimate		P value	Estimate		P value	Estimate		P value	Estimate		P value	Adj.R ² (%)	RSE (m²/ha/5 years)
P. abies	7.78	(0.78)	***	0.68	(0.03)	***	−1.70	(0.2)	***	−12.97	(3.6)	***	33	0.47
A. alba	4.27	(0.15)	***	0.74	(0.03 )	***	−0.84	(0.05)	***				30	0.45
P. sylvestris	3.51	(0.31)	***	0.62	(0.02)	***	−0.63	(0.09)	***	−10.16	(1.02)	***	37	0.48
F. sylvatica	2.62	(0.11)	***	0.47	(0.02)	***	−0.48	(0.03)	***				15	0.52
Q. robur	0.44	(0.04)	***	0.70	(0.02)	***				11.19	(0.84)	***	35	0.40
Q. petraea	2.89	(0.10)	***	0.69	(0.02)	***	−0.58	(0.03)	***				36	0.37
Q. pubescens	0.16	(0.18)		0.64	(0.04)	***	0.18	(0.07)	**				42	0.41
P. halepensis	4.29	(1.18)	***	0.74	(0.04)	***	−1.05	(0.34)	**	−7.26	(3.8)		45	0.43

See Eq. 2 for model structure. Numbers in parentheses are estimated standard-errors. Levels of significance of slopes inferred by a Student t test (p value): <0.1; *<0.05; **<0.01; ***<0.001. Adj. R ² is the adjusted coefficient of determination. RSE the residual standard error
Figures under parentheses are parameter standard errors

ISSN: 1297-966X