r350 



600n 



500- 



400- 



300- 



< 

 a: 



200- 



100- 



O " Grasslond Control 



^-Grassland Experimental (Excluding 13- Lined 



Ground Squirrel) 



□ "Grassland Experimental (Including 13- Lined 



Ground Squirrel) 



# - Sagebrush Control 



A - Sagebrush Experimental 



April 



T 1 1 r 



July August September October 



-300 



-250 



-200 



Z 

 < 

 q: 



-150 



-100 



Figure 52. Monthly changes in total small mammal biomass on live-trapped grids. 



180 



