. Assessing big sagebrush at multiple spatial scales : an example in southeast Oregon. Big sagebrush; Sagebrush; Sage grouse; Habitat (Ecology); Vegetation monitoring; Vegetation dynamics; Range ecology. Figure 16. An example of subclass 1(D), a woodland dominated by west- ern juniper. Although the vegetation was dominated in the past by sagebrush and Thurber's needle- grass, sagebrush canopy cover now is basically nonexistent. Photo taken by Jon Bates. winter habitat (Hanf et al. 1994). Excessive livestock grazing pressure and fire suppression since Euro-American settlement have been the main
. Assessing big sagebrush at multiple spatial scales : an example in southeast Oregon. Big sagebrush; Sagebrush; Sage grouse; Habitat (Ecology); Vegetation monitoring; Vegetation dynamics; Range ecology. Figure 16. An example of subclass 1(D), a woodland dominated by west- ern juniper. Although the vegetation was dominated in the past by sagebrush and Thurber's needle- grass, sagebrush canopy cover now is basically nonexistent. Photo taken by Jon Bates. winter habitat (Hanf et al. 1994). Excessive livestock grazing pressure and fire suppression since Euro-American settlement have been the main contributors to the formation of many of these woodlands (Eddleman et al. 1994). These vegetation types have depleted understory herbaceous vegetation in addition to depleted (or sometimes nonexistent) shrub canopy cover, and they may have depleted biological soil crusts if the sites are capable of supporting biological soil crusts. The depletion of the shrub, herbaceous, and biological soil crust cover may result in accelerated erosion in these vegetation types, as well as in documented declines in veg- etation productivity, floral and faunal diversity, and wildlife habitat (Wilcox 2002). This vegeta- tion is not desirable to sustain in its present state if the site has the potential to support sagebrush. Subclasses for Class 2 Subclass 2(A): This vegetation is dominated by native grasses and forbs, with some recruitment of sagebrush, which generally meets a portion of the habitat needs of wildlife species that rely primarily on sagebrush and associated understory herbaceous species (Figure 17). This vegetation is typically observed after fire occurs, when sage- brush species are reestablishing. It is desirable as patches, intermingled with subclasses 1(A), 2(C), 3(A), 3(B), 3(C), 4(B), and 5(A).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not
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