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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

From: Long-term vegetation response following post-fire straw mulching

Response Seedling density (seedlings ha−1)Cover (%)Seedling height (cm)
Ponderosa pineDouglas-firGraminoidSoil
InterceptCoefficient30.1 ±63.8−96.3 ±51.5−4.5 ±4.6−21.1 ±8.2−38.1 ±30.0
P-value0.6460.0600.328<0.0010.204
Mulch (yes or no)Coefficient−79.0 ±31.4132.7 ±37.92.0 ±0.6 9.2 ±2.9
P-value0.0860.0400.002 0.001
Transformed aspect (0 to 1)Coefficient −25.1 ±25.1 15.9 ±3.52.0 ±3.4
P-value 0.391 <0.0010.005
Elevation (m)Coefficient43.1 ±100.8222.9 ±83.8 0.17 ±0.0132.4 ±9.4
P-value0.6980.076 <0.0010.001
dNBR (NBR units)Coefficient127.8 ±33.6    
P-value0.032    
Fire (name)Coefficient+++ +
P-value+++ +
Water deficitCoefficient119.2 ±22.260.6 ±18.80.02 ±0.01 8.70 ±3.2
P-value0.0130.0480.059 0.006
Mulch*ElevationCoefficient−75.4 ±37    
P-value0.134    
Mulch*TraspCoefficient 109.7 ±31.4  −12.4 ±2.7
P-value 0.397  0.093
Seedling speciesCoefficient    +
P-value    +
Seedling ageCoefficient    8.7 ±3.9
P-value    0.027
Age*SpeciesCoefficient    +
P-value    +
ANOVA without mulchP-value0.001<0.001<0.0010.889<0.001