2010-02-01_REPORT - M1983194 (2)

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u ;ry ?ti - _ section. The scientific and common names of the all the plant species encountered in the study are presented in the tables at the end of this section. The ground cover data in Table 6-3 is summarized by class of vegetation and cover type from data presented in Table Al. The ground cover data in Table Al are shown by plant species or cover type. The production data presented in Table 6-4 is summarized from the annual aboveground vegetation biomass production for each plant species as shown in Table Al. The species composition data presented in Table 6-5 is summarized by class of vegetation from the percent composition of each plant species encountered as determined by each species contribution to total biomass production as shown in Table Al. Table 6-3 - Ground Cover (%) for Native Rangeland (control), July 2009 2004 2005 1 2006 2007 2008 2009 Change from 2008 to 2009 Pere Grasnnial 27.2 26.6 27.7 26.9 27.7 26.05 -5.9% Perennial Forbs 10.1 12.6 6.1 5.6 6.65 6.55 -1.5% Annual Grass 0.2 1.2 0.9 1.2 1.4 1.00 -28.6% Weedy Forbs 1.1 3 0.8 0.6 0.75 0.25 1 -66.7% Shrubs 13.9 14.8 14.9 18.7 19.8 19.70 -0.5% Moss/Lichens 4.5 3.6 5.8 9.1 9.40 9.55 +1.6% Vegetative Litter 7.6 7.4 143 12.6 13.15 13.95 +5.7% Bare Ground 34 30.3 29.1 24.5 21.15 22.95 +7.8% Rock 1.4 0.5 0.4 0.8 0 0.00 0% Total 100 100 100 100 100 100 The ground cover values for perennial species have held relatively consistent over the last three years. Ground cover of native grasses in 2009 decreased about 6 percent from 2008. A 1.5 percent decrease in cover of native forbs occurred in 2009, but still remains consistent over the past three years. Native shrubs cover decreased by one-half a percent from 2008. Table 64 - Biomass Production (lbs/ac) from Native Rangeland, July 2009 Change from 2004 2005 2006 2007 2008 2009 2008 to 2009 Perennial Grass 109.1 119 170.8 98. 335.66 325.18 -3.1% 1 Perennial Forbs 27.1 35 31.7 59.4 116.48 106.01 -9.0% Annual Grass 2.1 16.7 5.9 10 12.31 15.53 +20.7% Weedy Forbs 1.2 9.3 3.4 6.8 4.85 6.52 +25.6% Shrubs *** *** 92.1 154 182.07 153.71 -15.6% Total *** *** 303.9 328. 651.37 606.95 -6.8% 2009 Annual Report 15 of 33