2017-06-28_PERMIT FILE - C1981018A ‎(5)‎

• Permit No: C1981018A
• IBM Index Class Name: Permit File
• Doc Date: 6/28/2017
• Section_Exhibit Name: SECTION II.E & II.F Climatology Report & Vegetaton Studies
• Media Type: D
• Archive: Yes

ERO Resources
Dwyer 11975) has reviewed much of this and similar information that
indicate a general increase in the predominance of woodlands resulting
from increased land use pressures. Sheep grazing is of particular
interest in Dwyer's review. References cited by Dwyer include Miller
(1921), Emerson (1932), Allred (1949), Johnsen (1961) and Jameson (1966
and 1970). Johnsen advances four suggestions concerning the increase of
juniper in southwestern rangelands:
1) lack of periodic fires that control the numbers of young juniper
trees;
2) increased spread of juniper seed by livestock, particularly
sheep;
II.F-13
1)
the potential of sagebrush lands has been drastically altered,
•
perhaps permanently;
2)
important events in cyclic trends in pristine sagebrush/
grasslands have been truncated by land use since the 1850's and
more importantly that some of these events such as wildfire, now
produce results that produce further degradation affects (see
also, Young and Evans 1978) due to the prevalence of cheatgrass
on degraded range;
3)
degradation of sagebrush rangelands continues in the present day
as both the result of established downward trends and as the
result of inadequate range management practices; and
4)
the probability of restoring sagebrush lands to pristine or near
pristine conditions is slight, at best, primarily because
sagebrush/grasslands were never true grasslands - this feature
relates to two important sub -concepts 01 that the perennial
grass component will not be rejuvenated by grazing pressure
relaxation alone; reintroduction of perennial grasses by seeding
is also necessary and 121 that the relative youth of the
•
sagebrush and pinyon -juniper ecosystems is a factor in their
notably cyclic and instable character; evolution of process and
species dynamics in these systems was incompletely developed by
the time domestic grazing animals were introduced.
Dwyer 11975) has reviewed much of this and similar information that
indicate a general increase in the predominance of woodlands resulting
from increased land use pressures. Sheep grazing is of particular
interest in Dwyer's review. References cited by Dwyer include Miller
(1921), Emerson (1932), Allred (1949), Johnsen (1961) and Jameson (1966
and 1970). Johnsen advances four suggestions concerning the increase of
juniper in southwestern rangelands:
1) lack of periodic fires that control the numbers of young juniper
trees;
2) increased spread of juniper seed by livestock, particularly
sheep;
II.F-13