Saving the Sagebrush Sea
by Bruce Pendery
“
. . . I admit to having taken sagebrush for granted. It is
always there; from its matrix rise the island mountain ranges, below
it the rings of salt desert spiral toward barren playas. Its sharp
scent, laced with dust and wind and sometimes a trace of rain, becomes
so familiar that it no longer registers — until you leave this
country and miss it.”
—Stephen Trimble, The Sagebrush Ocean, 1989
Probably no plant defines the West, and Wyoming, more than
does sagebrush. It is the ecological glue holding a vast
community of life together. Yet we are losing it.
A new scientific paper is a clarion call for all of us to
learn more about the sagebrush ecosystem, and to protect it. In “Teetering
On The Edge Or Too Late? Conservation and Research Issues for Avifauna
of Sagebrush Habitats,” recently published in The Condor,
author Steven Knick and his five co-authors sound the alarm for
protecting this unique habitat, particularly with respect to the
birds that depend on it.
The authors note that this vast ecosystem is increasingly
jeopardized by degradation, fragmentation and outright loss of
native sagebrush landscapes. Threats include oil and gas development,
urbanization, livestock grazing, conversion to cropland and invasion
by non-native plant species. Color maps document that even though
on a broad scale there are still extensive areas of sagebrush,
much of it has become highly fragmented. That is, sagebrush habitats
are increasingly disconnected and isolated from each other, which
has significant and usually negative ecological consequences.
WOC is committed to saving sagebrush ecosystems in special places
like the Jack Morrow Hills and the breathtakingly long big-game
migration routes in the Upper Green River Valley.
The paper focuses on the impacts of habitat degradation,
fragmentation and loss on birds. It documents that at least five
species — the greater sage grouse, Gunnison sage grouse,
sage thrasher, Brewer’s sparrow and sage sparrow — depend
on sagebrush for their survival. Another 13 species, ranging from
the ferruginous hawk to the green-tailed towhee and vesper sparrow,
are highly dependent on sagebrush because they require open shrub
or grassland habitats to survive.
The authors write, “We need to enlarge existing protected
blocks, increase connectivity in the landscape, and employ basic
principles of landscape management to ensure long-term survival
of sagebrush habitats and birds.” They recommend that because
less than three percent of sagebrush habitats are safeguarded in
national parks or other protective federal reserves, “Approximately
[10.6 million acres]of sagebrush lands would need to be placed
in nature reserves if we are to meet the conservation goal of protecting
10% of the distribution.”
And, of course, sagebrush is of critical importance to many
other species besides birds, particularly pronghorn and mule deer.
In many instances sagebrush is a vital component of their habitat,
particularly on winter ranges where it may provide virtually the
only available cover and forage at times. While the volatile chemicals
in sagebrush may make it unpalatable for some species, for many
of our big-game animals it is important and highly nutritious forage.
Fortunately, more than 70% of sagebrush habitats are on public
lands. Therefore, if federal land-management agencies heed the
call in “Teetering On The Edge Or Too Late?” we should
be able save this magnificent and irreplaceable ecosystem. Nevertheless,
as the authors point out, “Our primary challenge…may
be to convince our society of the intrinsic value of sagebrush
ecosystems and their unique biodiversity.”
Wyoming is clearly an area where there are relatively large
areas of sagebrush in good condition. Thus, it makes sense for
protection and restoration efforts to be centered here, which is
one reason why WOC invests so much energy in protecting special
places like the Jack Morrow Hills and the breathtakingly long big-game
migration routes in the Upper Green River Valley. This new paper
can be an important resource for those efforts.
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