not statistically significant. Prescribed +/- Upper Snake Big sagebrush Bird density Territories Initial decline for Petersen and Best burning River plain, ID (territories/km2) estimated with 2 seasons 1987 spot-map method burn, but more and census over 5 than doubled years after; higher densities than control within 5 years. Prescribed - Southeastern ID Big sagebrush Activity budget Territories Prefer foraging Winter 1984 burning delimited using sites with greater flush technique and coverage, so burns nests found with that reduce rope-dragging sagebrush within territories. coverage reduce foraging. Affects females more. Grazing NC Central MT Sagebrush Abundance Dependent Comparison of Dreitz et al. 2015 ecosystem transect traditional grazing surveys and nest and rest-rotation searches. grazing, not grazed vs. ungrazed. No difference in abundance between grazed plots. Grazing NC / - Southcentral Sagebrush Density (birds/ha) Line sampling A 44% greater Erickson 2011 WY (Stratton habitats transect with density of Sagebrush including stratified random Brewer’s Sparrow Ecological mountain big design in late grazing Research Site) sagebrush and pasture compared black to early and sagebrush summer grazing. interspersed with antelope bitterbrush
not statistically significant. Prescribed burning +/- Upper Snake River plain, ID Big sagebrush Bird density (territories/km2) Territories estimated with spot-map method and census over 5 years Initial decline for 2 seasons but more than doubled after; higher densities than control within 5 years. Petersen and Best 1987 Prescribed burning - Southeastern ID Big sagebrush Activity budget Territories delimited using flush technique and nests found with rope-dragging within territories. Prefer foraging sites with greater coverage, so burns that reduce sagebrush coverage reduce foraging. Affects females more. Winter 1984 Grazing NC Central MT Sagebrush ecosystem Abundance Dependent transect surveys and nest searches. Comparison of traditional grazing and rest-rotation grazing, not grazed vs. ungrazed. No difference in abundance between grazed plots. Dreitz et al. 2015 Grazing NC / - Southcentral WY (Stratton Sagebrush Ecological Research Site) Sagebrush habitats including mountain big sagebrush and black sagebrush interspersed with antelope bitterbrush Density (birds/ha) Line sampling transect with stratified random design A 44% greater density of Brewer’s Sparrow in late grazing pasture compared to early and grazing. Erickson 2011 burn, summer
Sagebrush%20birds%20WAFWA%20draft%2010-27-16.docx