Chapter 6
Science and the Struggle for Bureaucratic
Power: The Leopold Era, 19631981 (continued)
Natural Regulation and Elk
Like the Leopold Report, the new policies sanctioned both
"naturalness" and manipulation in resource management. They also
endorsed what was becoming known as "natural regulation" or "natural
processes" management, stating that managers would "minimize, give
direction to, or control" the "changes in the native environment and
scenic landscape resulting from human influences on natural processes of
ecological succession." By attempting to "neutralize" human influences,
the Service aimed to allow the "natural environment to be maintained
essentially by nature." [115]
In contrast, though, the new policies provided for the manipulation
of populations, such as the taking of fish, a practice long accepted in
national parks. They also permittedand seem even to have taken for
grantedthe continued reduction of ungulate populations. Wildlife
populations would be controlled "when necessary to maintain the health
of the species, the native environment and scenic landscape," or to
ensure public safety and health. Included in the appendix to the policy
book was a September 1967 memorandum from Director Hartzog that dealt
solely with control of ungulate populations. Overall, the new policies
stressed manipulation more than natural regulation, but left the Service
with the option of taking whichever approach it might deem necessary.
[116]
Already, with Yellowstone's northern elk herd, the Park Service had
suddenly made what would become one of its most controversial natural
regulation decisions. Despite the Leopold Report's recommendations to
the contrary, sportsmen's organizations and state game officials had
continued to lobby for hunters' participation in national park reduction
programs. At the same time, reacting to increased media coverage, the
public became uneasy about the killing of elk and other park ungulates.
In response, Director Hartzog met in early March 1967 with Secretary
Udall and U.S. Senator Gale McGee of Wyoming and agreed to halt the
shooting of elk on Yellowstone's northern range, a decision that
immediately preceded Senator McGee's public hearings on the issue.
At the hearings Hartzog declared that the "direct kill of elk in the
park is stopped." In a separate announcement, he stated that the "most
desirable means of controlling elk numbers" was through public hunting
on lands adjacent to Yellowstone. Winter migration of elk from the park
to neighboring lands, where the animals could be hunted, would be
"facilitated whenever possible." The park would also intensify its
trapping and shipping of elk to other areas. But Hartzog made it clear
that if the new policy did not work, the Service would resume direct
reduction. Termination of the long-standing population control program
did not take effect until the following winter. The policy change was
applied to other parks, particularly Rocky Mountain, and soon resulted
in termination of the killing of any native ungulate species for
purposes of population control. [117]
The policy decision arrived at by Hartzog, Udall, and McGee came not
as a result of scientific findings, but because of political pressure.
Adding to the pressure was Senator Clifford Hansen's resolution pending
before the Senate Interior Committee to prohibit direct reduction of elk
in Yellowstone (apparently retaliation for the fact that the hunting
community had not been allowed to participate in the killing). The
agreement to end the reduction program thus provided a quick solution to
increasingly difficult problems: the angry crossfire of public alarm
over shooting elk, the demands of hunters to participate in the
reduction, and rising concern in Congress.
Soon, however, the Service justified its new policy on the basis of
the natural regulation theory. A September 1967 park information paper
outlined a program to "encourage the natural regulation of elk" in
Yellowstone. The following December a similar park document, entitled
"Natural Control of Elk," declared natural regulation to be the
preferred management approach. Rather than by shooting, elk populations
would be determined by "winter food [availability], by periodic severe
winter weather and native predators." The Park Service asserted that
"historical and recent knowledge" indicated that such factors would
limit the number of elk. (Park biologists soon came to view predators as
a much less important factor than the other two.) [118]
With management primarily focused on the most conspicuous plants and
animals, the Park Service had, in effect, always practiced a form of
natural regulation of the less obvious species by ignoring them
(although many were affected by fire suppression, forest insect and
disease control, and other park activity). As the Service's earliest
official natural resource policy, Fauna No. 1 declared that "every
species" that was not threatened with extinction in a park should be
"left to carry on its struggle for existence unaided." Natural
regulation theory began to be more fully articulated in the 1950s and
1960s as an alternative to artificial control of ungulate populations.
However, despite claims of "historical and recent knowledge," the Park
Service had virtually no scientific data on the overall ecological
effects of a naturally regulated elk herd on the northern range. Nor,
since the Service lacked supporting data and had prepared no formal
research plans, did it begin the politically motivated program as a
truly scientific experiment. Initiated as a comprehensive program
without prior testing, it was more than anything else a political
experiment.
One of Yellowstone's own scientists, William J. Barmore, protested to
the park's lead biologist, Glen Cole, that the Service was "abruptly
'scrapping' current objectives with no . . . supporting information." He
seriously doubted that the park could "come up with a satisfactory
explanation of the proposed change [to natural regulation] on the basis
of objective information available at this time." In fact, in
February 1967, immediately before the policy change that had a
reasonable chance of resulting in an increase in elk population, Barmore
had presented a professional paper stating that aspen on the northern
range were in poor condition from overbrowsing by "excessive numbers of
elk" that were blocked from their traditional winter grasslands by
development outside the park." [119]
In adopting a natural regulation policy, the Park Service
disregarded the urgent call from both the Leopold and National Academy
reports for scientifically grounded decisionmaking. It also went against
the Leopold Report's recommendation that elk reductions continue (a
recommendation made in one instance in the context of the report's
discussion of "habitat manipulation"the exact opposite of natural
regulation). Although the report had laid out a series of elk management
options, it clearly favored direct reduction of the herd, stating that
"direct removal by killing is the most economical and effective way of
regulating ungulates within a park." At the March 1967 Senate hearings,
Leopold himself reaffirmed the need for direct reduction, stating that
he had not changed his mind on the matter. Nevertheless, in a somewhat
disingenuous effort to justify its change of elk policy, the Service
asserted that it was acting in accord with the Leopold Report. As
Hartzog stated in his announcement of the new elk policy, it was "based
on the recommendations approved by an advisory board to the Secretary of
the Interior" (the Leopold Committee). Similarly, Yellowstone
superintendent Jack Anderson held that the Service had "followed the
recommendations" of the Leopold Report. [120]
Maintaining close involvement with the national parks, Leopold held
to his belief that the natural regulation policy was resulting in
overgrazing and deterioration of the northern rangea position
shared by other critics. In a June 1983 interviewmore than a
decade and a half after the policy was initiatedhe remarked that
because of increased elk browsing Yellowstone's "aspen patches . . .
shrink every single year. . . . The aspen are simply just vanishing."
Blaming in part the absence of recurring fire in the area, he believed
that the "other part [of the problem] is elk chewing the remaining
aspens." The elk "simply girdle" the trees, "eat the bark right off, and
the aspens die and fall down and disappear."
That same month Leopold discussed the issue more fully in a letter to
SequoiaKings Canyon superintendent Boyd Evison. Coming only a few
weeks before Leopold's sudden death, this may have been his final
statement on natural regulation. Worried about the "progressive
disappearance of aspen," he stated that when ungulates are "destroying
vegetation, they should be reduced in number, by predators if possible,
if not, by trapping or shooting." He believed that such management
issues "are not resolved simply by 'allowing natural ecosystem processes
to operate.' " To Leopold, the national parks were "too small in area to
be relegated to the forces of nature that shaped a continent." [121]
Although for many species natural regulation had in essence always
operated in national park management, the Park Service had acted almost
as if the Leopold Report had "discovered" natural regulation. The
Service then applied it to elk management and embraced it, proclaiming
it to be sound policy. Yellowstone became perhaps the chief focus of the
natural regulation policyin part because the policy significantly
affected management of large mammals of interest to the public, animals
that Yellowstone had in much greater numbers than other parks in the
contiguous fortyeight states. Also, at about two million acres, the park
was large enough to encourage belief that it contained some
approximation of a "complete ecosystem," where natural regulation of
large mammals might be feasible.
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