Long-term vegetation response following post-fire straw mulching

Fire Ecology

Table 2 Final mixed effects model results, including coefficient ±standard error and P-values for each variable; (+) represents that a factored variable was used in the model but coefficients, standard error, and P-values were not included. Not shown are the values for the Fire variable, which is a factor containing six variables (the six fires across the US Interior West used in this study in 2015 and 2016), each having its own coefficient, standard error, and P-value

Response		Seedling density (seedlings ha⁻¹)		Cover (%)		Seedling height (cm)
Response		Ponderosa pine	Douglas-fir	Graminoid	Soil	Seedling height (cm)
Intercept	Coefficient	30.1 ±63.8	−96.3 ±51.5	−4.5 ±4.6	−21.1 ±8.2	−38.1 ±30.0
Intercept	P-value	0.646	0.060	0.328	<0.001	0.204
Mulch (yes or no)	Coefficient	−79.0 ±31.4	132.7 ±37.9	2.0 ±0.6		9.2 ±2.9
Mulch (yes or no)	P-value	0.086	0.040	0.002		0.001
Transformed aspect (0 to 1)	Coefficient		−25.1 ±25.1		15.9 ±3.5	2.0 ±3.4
Transformed aspect (0 to 1)	P-value		0.391		<0.001	0.005
Elevation (m)	Coefficient	43.1 ±100.8	222.9 ±83.8		0.17 ±0.01	32.4 ±9.4
Elevation (m)	P-value	0.698	0.076		<0.001	0.001
dNBR (NBR units)	Coefficient	127.8 ±33.6
dNBR (NBR units)	P-value	0.032
Fire (name)	Coefficient	+	+	+		+
Fire (name)	P-value	+	+	+		+
Water deficit	Coefficient	119.2 ±22.2	60.6 ±18.8	0.02 ±0.01		8.70 ±3.2
Water deficit	P-value	0.013	0.048	0.059		0.006
Mulch*Elevation	Coefficient	−75.4 ±37
Mulch*Elevation	P-value	0.134
Mulch*Trasp	Coefficient		109.7 ±31.4			−12.4 ±2.7
Mulch*Trasp	P-value		0.397			0.093
Seedling species	Coefficient					+
Seedling species	P-value					+
Seedling age	Coefficient					8.7 ±3.9
Seedling age	P-value					0.027
Age*Species	Coefficient					+
Age*Species	P-value					+
ANOVA without mulch	P-value	0.001	<0.001	<0.001	0.889	<0.001