Estimation of aboveground biomass and carbon stocks of Quercus ilex L. saplings using UAV-derived RGB imagery

Table 5 Regression models between UAV-derived biovolume and total aboveground biomass (n = 571)

Model	R ² adjusted	p-value	RMSE	AIC
Lineal	0.88	< 0.001	404.21	8434.10
Second-order polynomial regression	0.89	< 0.001	381.50	8369.42
Third-order polynomial regression	0.89	< 0.001	385.75	8381.99
Fourth-order polynomial regression	0.89	< 0.001	388.87	8391.15
Logarithmic regression	0.52	< 0.001	800.69	9210.61
Inverse exponential regression	0.65	< 0.001	687.17	9036.92

ISSN: 1297-966X