2020-03-24_PERMIT FILE - C1981019A ‎(5)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 3/24/2020
• Type & Sequence: TR135
• Section_Exhibit Name: 2.04 Information on Environmental Resources
• Media Type: D
• Archive: Yes

RULE 2 PERMITS
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Mountain Shrub Community
The mountain shrub community is characterized by varying densities of serviceberry
(Amelanchier alnifolia), Gambell's oak (Quercus gambelii), and chokecherry (Prunus
virginiana). During 1980 and 1988, overall woody plant density for the mountain shrub
community was determined to be approximately 6,970 and 6,370 plants per acre respectively. The
woody plant density for additional species is contained on Table 2.04.10-6, Woody Plant Density.
The density measurements for snowberry, involve many of the same problems in the mountain
shrub community as encountered in the sagebrush community. Large clumps of snowberry were
encountered making measurements of individual plants very difficult.
The growth form of this community is characterized by an overstory of shrubs ranging in height
from two to twelve feet. Typically, serviceberry and Gambell's oak are the predominate overstory
throughout the community. Serviceberry can be found in open to dense stands while Gambel's oak
tend to be found-in dense stands. On north facing slopes and in drainages where soils are deeper
with higher soil moisture conditions, moderately dense to dense stands of chokecherry are found.
Throughout the mountain shrub community, snowberry is the most common associated shrub
found in open to dense stands.
Numerous forbs and grasses occur in varied densities throughout this diverse community. The
most abundant grasses are Kentucky bluegrass (Poa pratensis), western wheatgrass and needle
and thread grass (Stipa comata). The most abundant forbs are lupine,yarrow,bedstraw(Gallium
spp.), and American vetch (Vicia americana). For 1980 and 1988 the total herbaceous cover for
the community was determined to be 41.9% and 56.67% respectively: For specific cover values
for individual species refer to Table 2.04.10-2, 1980 Herbaceous Cover by Species and Table
2.04.10-3, 1988 Herbaceous Cover by Species
For 1980 and 1988, the total herbaceous production for the mountain shrub community was
determined to be 569.0 and 933 pounds per acre respectively. According- to these production
figures, the carrying capacity in AUM's, assuming 1,000 pounds of air dry forage per AUM at
50% utilization, would be .28 and .47 AUM's per acre.
Based on the determination by the Bureau of Land Management of an average production of.18
AUM's per acre for the mountain shrub type in this area it is evident that the condition of the
mountain shrub community within the permit area is good.
Grazing has not occurred from the initial lease area since 1977 so it is anticipated that the condition
of the mountain shrub community will remain stable or improve. Grazing on the permit area
addition should be discontinued in 1991.
The mountain shrub community is typically found in the areas of higher soil moisture and deep,
medium to fine textured soils on all slopes and aspects within the permit area. Generally,the areas
with decreased soil moisture and shallower soils will tend towards elements of the sagebrush
community in a diverse transition area.
Rule 2 Permits 2.04-54 Revision Date: 12/20/19
Revision No.: TR-135