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• part of the reference area species list) but did include Aristida <br />purpurea. Thus, the five perennial grass species composed 89.0 ~ <br />of the total vegetative cover. Needle-and-thread and blue grams <br />were the dominant grass and plant species in both the main and <br />reference areas. Five species of perennial forbs were present in <br />both areas, contributing 5.8 $ and 4.0 $ relative cover <br />respectively. Annual plants contributed less than 10 ~ of the <br />total vegetative cover in both areas, while shrub species composed <br />less than 2 ~ relative cover. Both areas contained the highest <br />amount of litter of all the major communities and reference areas. <br />Herbaceous production was highest in this community type and <br />its reference area. 95.5 and 96.1 $ of the total production in the <br />main and reference areas respectively was contributed by perennial <br />grasses. Annuals contributed less than 38 of the total production <br />• in both areas. <br />Woody plants were found to be invading the grassland areas, <br />though a notable lack of very small seedlings probably indicates <br />the severity of the climate in recent years due to drought <br />conditions. <br />3. Juniper-Pinyon Woodland <br />A reference area was not sampled for this community type. The <br />areas mapped as Juniper-Pinyon Woodland which were within the <br />projected disturbed areas were partly transitional, though the more <br />- 11 - <br />• <br />