PDG-Arena: an ecophysiological model for characterizing tree-tree interactions in heterogeneous and mixed stands

Table 4 Evaluation of the performances of PDG-Arena and CASTANEA on the 37 stands

Set	Model	Inventories	r²	MAPE
All stands	CASTANEA	RM	29.5	40.6
	PDG-Arena	RM	32.1	40.5
	PDG-Arena	R	32.5	41.8
	PDG-Arena	O	34.2	40.4
Mixed	CASTANEA	RM	36.3	30.1
	PDG-Arena	RM	37.6	30.7
	PDG-Arena	R	36.3	33.1
	PDG-Arena	O	40.5	31.5
Beech pure	CASTANEA	RM	22.9	55.3
	PDG-Arena	RM	25.0	57.4
	PDG-Arena	R	24.7	57.9
	PDG-Arena	O	38.3	53.9
Fir pure	CASTANEA	RM	42.0	33.7
	PDG-Arena	RM	51.9	29.6
	PDG-Arena	R	50.1	30.4
	PDG-Arena	O	39.8	33.0

Coefficient of determination (r², in %) and Mean Absolute Percentage Error (MAPE, in %) were computed for the simulated versus measured yearly wood volume increment per stand over the period 1996–2013. Inventories are characterized as: “RM” (regularized and monospecific, i.e., without species interactions), “R” (regularized, but with species interactions), and “O” (original inventories)

ISSN: 1297-966X