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Table 6 Summary of model statistics from regression analysis of fire severity effects on California ground squirrel (Spermophilus beecheyi) abundance in Yosemite National Park, California, 2004 and 2005 (n = 10). Models are listed from best to poorest fit.

From: Modeling the Effects of Fire Severity and Spatial Complexity on Small Mammals in Yosemite National Park, California

Model description K AICc ΔAICc w i
Abundance{patch perimeter} 3 44.69 0.00 0.61
Abundance{fire severity} 3 49.07 4.37 0.07
Abundance{oak cover + patch perimeter} 4 49.48 4.78 0.06
Abundance{patch squareness} 3 49.83 5.13 0.05
Abundance{canopy cover + patch perimeter} 4 50.15 5.45 0.04
Abundance{shrub cover + patch perimeter} 4 50.52 5.83 0.03
Abundance{fire severity + patch perimeter} 4 50.69 6.00 0.03
Abundance{trap week} 3 50.98 6.29 0.03
Abundance{oak cover} 3 51.75 7.06 0.02
Abundance{shrub cover} 3 52.03 7.33 0.02
Abundance{edge distance} 3 52.15 7.46 0.02
Abundance{canopy cover} 3 52.23 7.53 0.01
Abundance{trap year} 3 52.28 7.59 0.01
Abundance{fire severity + patch squareness} 4 54.70 10.01 0.00
Abundance{oak cover + patch squareness} 4 55.03 10.33 0.00
Abundance{shrub cover + patch squareness} 4 55.63 10.94 0.00
Abundance{canopy cover + patch squareness} 4 55.75 11.05 0.00
  1. a Statistics include: number of parameters (K) in the model, Akaike’s Information Criterion corrected for small sample size (AICc), relative AICc (ΔAICc), and Akaike weights (w i ).
  2. b Model effects were measured on individual trapping area level and include: total fire severity index (fire severity), sum of the perimeter of all fire severity patches (patch perimeter), patch squareness of fire severity patches (squareness), distance to nearest unburned edge (edge distance), total overstory canopy cover (canopy cover), shrub cover, and oak cover (oak tree cover).