Stand-level biomass models for predicting C stock for the main Spanish pine species

Aguirre, Ana; del Río, Miren; Ruiz-Peinado, Ricardo; Condés, Sonia

doi:10.1186/s40663-021-00308-w

Forest Ecosystems

Table 3 Coefficients estimated (a, b, m, c₁, p₁, c₂, p₂) and standard error (in brackets) for models from Eqs. 2 to 4 and Eq. 6, together the standard deviation of the random variable (StdRnd), Akaike Information Criterion (AIC) and marginal and conditional R² (M.R² and C.R²)

From: Stand-level biomass models for predicting C stock for the main Spanish pine species

sp	Model	a	b	m	c₁	p₁	c₂	p₂	StdRnd	AIC	M.R²	C.R²
Ps	Basic	2.7422 (0.0645)	0.7953 (0.0040)						0.1441	15,309	0.9609	0.9654
	Basic M	2.1193 (0.1109)	0.7887 (0.0041)	0.0868 (0.0178)					0.1179	15,285	0.9617	0.9659
	vm	1.0769 (0.0612)	0.8482 (0.0038)	0.1738 (0.0225)	0.0384 (0.0060)	−0.8141 (0.0471)			0.0446	14,414	0.9758	0.9787
	Total	0.4692 (0.0302)	0.8460 (0.0038)	0.1980 (0.0253)	0.0536 (0.0087)	−0.7265 (0.0467)		−0.1884 (0.0341)	0.0192	14,396	0.9761	0.9789
Pp	Basic	2.4602 (0.1064)	0.8430 (0.0086)						0.1564	4184	0.9348	0.9454
	Basic M	2.4602 (0.1064)	0.8430 (0.0086)						0.1564	4184	0.9348	0.9454
	vm	1.0857 (0.0514)	0.8575 (0.0087)			−0.0868 (0.0130)			0.0808	4155	0.9358	0.9484
	Total	0.2988 (0.0122)	0.8762 (0.0061)			−0.1967 (0.0087)		−1.0004 (0.0330)	0.0156	3769	0.9648	0.9750
Ph	Basic	1.2790 (0.0299)	0.9466 (0.0042)						0.0900	13,158	0.9495	0.9671
	Basic M	0.9246 (0.0472)	0.9365 (0.0043)	0.1429 (0.0233)					0.0685	13,104	0.9495	0.9680
	vm	1.0488 (0.0427)	0.9258 (0.0038)	0.0591 (0.0141)	0.4144 (0.0236)	0.5947 (0.0613)			0.0843	12,554	0.9604	0.9756
	Total	1.6377 (0.0570)	0.9132 (0.0032)	0.0547 (0.0117)	0.1571 (0.0149)	0.8163 (0.1005)	−0.5534 (0.0143)		0.0852	11,887	0.9784	0.9824
Pn	Basic	1.8320 (0.0415)	0.8905 (0.0039)						0.0970	10,751	0.9762	0.9787
	Basic M	2.0679 (0.0787)	0.8914 (0.0039)	−0.0326 (0.0079)					0.1078	10,735	0.9764	0.9790
	vm	1.0489 (0.0330)	0.9422 (0.0024)	0.0275 (0.0072)	0.0766 (0.0094)	−0.5930 (0.0312)			0.0487	9133	0.9903	0.9932
	Total	0.4478 (0.0162)	0.9363 (0.0024)	0.0395 (0.0076)	0.1282 (0.0173)	−0.4745 (0.0301)		−0.2534 (0.0214)	0.0178	9027	0.9911	0.9937
Pt	Basic	1.2275 (0.0257)	0.8997 (0.0037)						0.0541	9360	0.9793	0.9828
	Basic M	1.2275 (0.0257)	0.8997 (0.0037)						0.0541	9360	0.9793	0.9828
	vm	1.2275 (0.0257)	0.8997 (0.0037)						0.0541	9360	0.9793	0.9828
	Total	0.5757 (0.0180)	0.9009 (0.0040)			0.0162 (0.0066)	0.1445 (0.0415)		0.0255	9354	0.9800	0.9829

sp, are the species analyzed: Ps Pinus sylvestris, Pp Pinus pinea, Ph Pinus halepensis, Pn Pinus nigra, and Pt Pinus pinaster. Names of models Basic, Basic M, vm and Total correspond to Eqs. 2, 3, 4 and 6 respectively

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