Incorporating within- and between-patch resource selection in identification of critical habitat for brood-rearing greater sage-grouse

Dzialak, Matthew R; Olson, Chad V; Webb, Stephen L; Harju, Seth M; Winstead, Jeffrey B

doi:10.1186/s13717-015-0032-2

Ecological Processes

Table 2 Candidate models and variables used to assess resource selection in greater sage-grouse

From: Incorporating within- and between-patch resource selection in identification of critical habitat for brood-rearing greater sage-grouse

Model	Parameters ^a	K
Null	None^b	0
Sagebrush	Percent sagebrush (linear and quadratic terms)	2
Water resources	Percent sagebrush (linear and quadratic terms), distance to the nearest mesic area, and convexity 90 m	4
Sagebrush and non-energy-related anthropogenic features	Percent sagebrush (linear and quadratic terms), distance to the nearest mesic area, and distance to nearest residential or agricultural structure	4
Sagebrush and energy-related anthropogenic features	Percent sagebrush (linear and quadratic terms), distance to the nearest road, distance to nearest energy-related ancillary feature, and distance to nearest well	5
Terrain/topography	Percent sagebrush (linear and quadratic terms), slope (linear and quadratic terms), terrain roughness 90 m, and convexity 90 m	6
Movement facilitation	Percent sagebrush (linear and quadratic terms), percent bare ground (linear and quadratic terms), terrain roughness 90 m, and distance to the nearest road	6
Foraging	Percent sagebrush (linear and quadratic terms), percent herbaceous (linear and quadratic terms), distance to the nearest mesic area, and distance to the nearest residential or agricultural structure	6
Agriculture	Percent sagebrush (linear and quadratic terms), percent litter (linear and quadratic terms), distance to the nearest mesic area, and distance to the nearest residential or agricultural structure	6
Thermal environment	Percent sagebrush (linear and quadratic terms), percent shrub (linear and quadratic terms), slope (linear and quadratic terms), and heat load index	7
Local concealment	Percent sagebrush (linear and quadratic terms), percent shrub (linear and quadratic terms), percent bare ground (linear and quadratic terms), and percent litter (linear and quadratic terms)	8
Terrain/topography and foraging	Percent sagebrush (linear and quadratic terms), percent herbaceous (linear and quadratic terms), distance to the nearest mesic area, and distance to the nearest residential or agricultural structure, slope (linear and quadratic terms), terrain roughness 90 m, and convexity 90 m	10
Vegetation	Percent sagebrush (linear and quadratic terms), percent shrub (linear and quadratic terms), percent herbaceous (linear and quadratic terms), percent litter (linear and quadratic terms), percent bare ground (linear and quadratic terms), and estimated shrub height (linear and quadratic terms)	12
Foraging/perceived risk	Percent sagebrush (linear and quadratic terms), percent herbaceous (linear and quadratic terms), percent bare ground (linear and quadratic terms), estimated shrub height (linear and quadratic terms), distance to the nearest mesic area, distance to the nearest road, distance to the nearest energy-related ancillary feature, and distance to the nearest well	13
Vegetation and water resources	Percent sagebrush (linear and quadratic terms), percent shrub (linear and quadratic terms), percent herbaceous (linear and quadratic terms), percent litter (linear and quadratic terms), percent bare ground (linear and quadratic terms), estimated shrub height (linear and quadratic terms), and distance to the nearest mesic area	13
Vegetation and terrain/topography	Percent sagebrush (linear and quadratic terms), percent shrub (linear and quadratic terms), percent herbaceous (linear and quadratic terms), percent litter (linear and quadratic terms), percent bare ground (linear and quadratic terms), estimated shrub height (linear and quadratic terms), slope (linear and quadratic terms), terrain roughness 90 m, and convexity 90 m	16
Global	All parameters	22

^aListed in Table 1. ^bThe PHREG procedure in SAS does not estimate an intercept. Candidate model set that includes competing hypotheses (null model, global model, and 15 competing hypotheses) on how landscape features structure occurrence of greater sage-grouse (Centrocercus urophasianus) during 2009 to 2012 in south-central Wyoming, USA. Each model (i.e., competing hypothesis) lists the number of parameters (K) and their description. Models are sorted in ascending order from least to most parameters.

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