Advances in Ecology / 2015 / Article / Tab 5 / Research Article
Resource Selection by an Endangered Ungulate: A Test of Predator-Induced Range Abandonment Table 5 Description of candidate variables used to model resource selection by Sierra Nevada bighorn sheep and descriptive statistics for 18,240 random locations, Sierra Nevada, California, USA, 2002–2007. Values reported for binary variables are counts.
Variable Description Mean SD Min. Max Continuous variables KLRISK Risk surface, locations of bighorn sheep kills 33.66 26.46 1.00 99.00 LNRISK Risk surface, locations of active mountain lions 28.83 26.86 1.00 99.00 NDSI Normalized difference snow index −2.46 × 10−2 0.33 −0.67 0.90 NDVI Normalized difference vegetation index −0.15 0.14 −0.44 0.59 ELEV Elevation in meters 2.47 × 103 600.59 1.29 × 103 4.01 × 103 SLOPE Slope in degrees 33.33 14.31 0.00 80.47 PRR Potential relative radiation 1.17 × 103 532.86 0.00 1.98 × 103 Terrain ruggedness (over specified radius) RUG15 15 m 230.40 195.47 0.00 2.70 × 103 RUG20 20 m 411.49 267.63 0.00 3.39 × 103 RUG30 30 m 561.58 309.56 0.00 2.68 × 103 RUG100 100 m 9.93 × 102 390.77 86.63 3.77 × 103 RUG150 150 m 1.14 × 103 404.37 144.56 3.44 × 103 Binary variables (frequency) ROCK Classified from NAIP 2009 image 325 — — — TRESH Tree and mixed shrub classification 6.66 × 103 — — — Convexity (over specified radius) CVX15 15 m 1.69 × 104 — — — CVX20 20 m 1.57 × 104 — — — CVX30 30 m 1.44 × 104 — — — CVX100 100 m 1.10 × 104 — — — CVX150 150 m 1.02 × 104 — — —
