NC Prescribed Upper Snake Big sagebrush Bird density Territories Sage Thrasher Petersen and Best burning River plain, ID (territories/km2) estimated with populations 1987 spot-map method remarkably stable and census over 5 on both years treatments, showing no response to fire. NC Grazing Southcentral WY Sagebrush Density (birds/ha) Line sampling No pasture effects Erickson 2011 (Stratton habitats transect with were evident for Sagebrush including stratified random Sage Thrasher. Ecological mountain big design Research Site) sagebrush and sagebrush interspersed with antelope bitterbrush - Grazing Northern Great Shrub steppe Density index One bird census Highest density Kantrud and Plains (pairs/min x 103) per 65 ha plot on low intensity Kologiski 1983 using hollow grazing plots; square technique higher density on high intensity plots than moderately grazed plots. Grazing NC Eastern ID Big sagebrush Successful nests Visual Slight increase in Reynolds and (sheep) and former observation in number of in Trost 1980 sagebrush range ha grid. grazed plots, but reseeded with difference small crested enough to be wheatgrass inconclusive. - Mechanical Northeast UT Density Applied Decreased Norvell et al. 2014 thinning cover experimental abundance in first mechanical year thinning to shrub treatment and did cover. 2,400-m not recover. long-line transects in 4 600-m legs along
treatment Prescribed burning NC Upper Snake River plain, ID Big sagebrush Bird density (territories/km2) Territories estimated with spot-map method and census over 5 years Sage Thrasher populations remarkably stable on both treatments, showing no response to fire. Petersen and Best 1987 Grazing NC Southcentral WY (Stratton Sagebrush Ecological Research Site) Sagebrush habitats including mountain big sagebrush and sagebrush interspersed with antelope bitterbrush Density (birds/ha) Line sampling transect with stratified random design No pasture effects were evident for Sage Thrasher. Erickson 2011 Grazing - Northern Great Plains Shrub steppe Density index (pairs/min x 103) One bird census per 65 ha plot using hollow square technique Highest density on low intensity grazing plots; higher density on high intensity plots than moderately grazed plots. Kantrud and Kologiski 1983 Grazing (sheep) NC Eastern ID Big sagebrush and former sagebrush range reseeded with crested wheatgrass Successful nests Visual observation in grid. Slight increase in number of in grazed plots, but difference small enough to be inconclusive. Reynolds and Trost 1980 Mechanical thinning - Northeast UT cover Density Applied experimental mechanical thinning to shrub cover. 2,400-m long-line transects in 4 600-m legs along Decreased abundance in first year and did not recover. Norvell et al. 2014 ha
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