. 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. Ill I much of which is in mid-seral, late-seral, or potential natural community ecological status, the 20-year management objectives are conser- vative in the amount of treatment proposed. Preventing further conversion of shrubland to grassland, as much as possible, will be necessary to achieve the Resource Area objective for big sagebrush habitats. Determine Site (Local, Within Pasture) Subcl
. 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. Ill I much of which is in mid-seral, late-seral, or potential natural community ecological status, the 20-year management objectives are conser- vative in the amount of treatment proposed. Preventing further conversion of shrubland to grassland, as much as possible, will be necessary to achieve the Resource Area objective for big sagebrush habitats. Determine Site (Local, Within Pasture) Subclasses Habitat needs occur at multiple scales. For the Rangeland Health Standard 5 evaluations, the five canopy cover classes of big sagebrush are useful "big picture" descriptors for assessing habitat structural conditions important to wildlife. The canopy cover classes are also use- ful for setting management objectives that use ranges of habitat values and combinations of habitats. However the relationships between overstory big sagebrush canopy cover, associated understory herbaceous species, and biological soil crust communities can be better assessed and described at a finer scale with more detailed data. These more discrete measures are often difficult to attain, difficult to measure and monitor over the long term, and difficult to integrate into activity plans that extend over large areas of land. At present within the BLM, because there are hundreds of thousands, even millions, of acres within each field office's jurisdiction, it is not possible to conduct an on-the-ground detailed assessment to discern all of the possible combi- nations of overstory and understory conditions present at finer scales within pastures. Alternatively, for the SEORMP, the five classes of big sagebrush canopy cover were further divided into subclasses, which serve as the basis for a site- (local-) scale, more detailed way of mapping big sagebrush habitat conditions with pastures. Al
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