Increasing radial and latewood growth rates of Larix cajanderi Mayr. and Pinus sylvestris L. in the continuous permafrost zone in Central Yakutia (Russia)

Table 2 Estimated parameters of the generalized additive model for radial growth and latewood in Larix cajanderi and Pinus sylvestris

			Estimate	SE	t	P
Ring width	Larch	Intercept	− 628.222	170.609	− 3.682	< 0.001
		Year	0.349	0.087	4.011	< 0.001
		S1	0			a
		S2	1.203	5.519	0.218	a
		S3	30.214	6.214	4.862	b
		S4	10.887	6.132	1.775	ab
		Age	edf 1		F 78.07
		Age	edf 1		F 78.07	< 0.001
	Pine	Intercept	− 287.121	134.246	− 2.139	0.032
		Year	0.174	0.069	2.528	0.011
		S1	0			a
		S2	21.623	5.834	3.706	ab
		S3	32.121	5.749	5.587	b
		Age	edf 5.325		F 17.06
		Age	edf 5.325		F 17.06	< 0.001
Latewood	Larch	Intercept	− 212.486	77.530	− 2.741	< 0.01
		Year	0.121	0.039	3.080	< 0.01
		S1	0			a
		S2	− 2.655	2.512	− 1.057	a
		S3	10.212	2.813	3.630	b
		S4	− 2.996	2.789	− 1.074	a
		Age	edf 5.232		F 15.95
		Age	edf 5.232		F 15.95	< 0.001
	Pine	Intercept	− 72.062	30.709	− 2.374	0.018
		Year	0.043	0.015	2.768	< 0.01
		S1	0			a
		S2	1.769	1.411	1.253	a
		S3	6.318	1.361	4.640	b
		Age	edf 1		F 52.47
		Age	edf 1		F 52.47	< 0.001

ISSN: 1297-966X