Predicting snag fall in an old-growth forest after fire

Fire Ecology

Table 2 Descriptions of 14 sets of predictor variables for binary random forest models of snag fall after fire for pre-fire and newly dead post-fire snag populations. Each row represents a set of predictor variables. See Additional file 1: Table S6 for descriptions of the variables in each predictor variable category

Predictor set		Categories of predictors in each model								Scale
		Snag attributes			Snag neighborhood metrics					Neighborhood annuli (m)
		Fixed	Pre-fire	Post-fire	Pre-fire isolation	Pre-fire annuli	Post-fire fixed	Post-fire isolation	Post-fire annuli	0–3	3–6	6–9	9–12	12–15
Post-fire	0–15 m	×		×			×		×	×	×	×	×	×
	0–12 m	×		×			×		×	×	×	×	×
	0–9 m	×		×			×		×	×	×	×
	0–6 m	×		×			×		×	×	×
	0–3 m	×		×			×		×	×
	Isolation	×		×			×	×
	Attributes	×		×
Pre-fire	0–15 m	×	×^a			×				×	×	×	×	×
	0–12 m	×	×^a			×				×	×	×	×
	0–9 m	×	×^a			×				×	×	×
	0–6 m	×	×^a			×				×	×
	0–3 m	×	×^a			×				×
	Isolation	×	×^a		×
	Attributes	×	×^ab

^aModels of the post-fire snag population did not include pre-fire snag attributes
^bThe model based just on fixed snag attributes was not included in the analysis