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Table 2 The mean capture rate for the 4 most common species (>5 individuals captured at each area) for all 10 burned areas trapped each week April — July 2004 and 2005 in Yosemite National Park, California.

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

Species Mean capture ratea
Low fire severityb Moderate fire severityb High fire severityb
Mean SE Mean SE Mean SE
Deer mouse 40.0 15.5 25.3 6.5 15.5 7.4
Brush mouse 5.6 5.1 0.3 0.3 4.6 4.1
Chipmunk species 14.3 7.3 10.8 4.6 4.7 4.4
California ground squirrel 5.8 7.6 4.3 0.7 0.0 0.0
  1. a Capture rate calculated as CR= I × 1000/(T − S/2) (Nelson and Clark 1973) where I = number individuals captured, T= number of traps multiplied by number of nights traps were open, and S = number of traps sprung by all causes (or frozen open due to extreme weather).
  2. b Mean capture rates were calculated for fire severity levels by grouping each site according to its total fire severity index; 1–1.9 = low severity, 2–2.9 = moderate severity, and 3–4 = high severity.