Table 1. Distichlis stricta Community Productivity (kg/ha) 



Table 2. Distichlis stricta - Agropyron smithii Community Productivity (kg/ha) 



Dist Agsm Hemi Litter e Productivity 



1977 676 ± 130 72 ± 20 51± 18 1071+ 184 813± 114 



1978 1393 ± 165 418 ± 99 167±51 521± 72 2071±214 



1979 856 ± 156 252 + 68 164± 35 1432± 206 1248± 189 



1980 585 ± 102 108 ± 27 92± 33 2434± 455 778± 87 



1981 938 ± 114 343+ 65 167± 72* 2257± 408 1481± 114 



* Including Bouteloua gracilis , Stipa comata, Carex filifolia , Artemisia 



frigida , and Koeleria pyramidata (Lam.) Beauv. A patch of" Spartina gracilis 

 is expanding outside the sample area of this exclosure. 



Table 3. Bouteloua gracilis Community Productivity (kg/ha) 



Bogr Litter e Productivity 



1977 170± 14 38± 38 198± 24 



1978 513+ 160 375± 61 778± 227 



1979 606+ 99 458± 178 632± 102 



1980 199± 20 790± 415 1 99± 20 



1981 319+ 25 166± 110 434± 45* 



* Including 65 kq/ha of Festuca octoflora. 



