Yellowstone's Destabilized Ecosystem: Elk Effects, Science, and Policy ConflictOxford University Press, 25 мая 2006 г. - Всего страниц: 392 Wagner, one of our most distinguished wildlife biologists, is a strong critic of ecological practices in the national parks. This book provides an assessment of the ecological history of Yellowstone's northern range, since before the park existed, showing the impact of US Park Service policies on the health of the areas they oversee. He demonstrates that elk had been historically rare throughout the region and that overgrazing by elk has seriously degraded the landscape and altered the structure of the area. This is a major contribution to reconstructing the ecology of this region over the course of the past 500 years. It is also a critique of US Park Service management policies and their stewardship of the nation's most cherished natural areas. Wagner's book will generate substantial attention and debate both in the scientific and policy/management communities. |
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Стр. xi
Elk Effects, Science, and Policy Conflict Frederic H. Wagner. Two individuals emerged in the 1980s who were particularly aggressive in bringing public scrutiny onto the northern range situation. Alston Chase, former chairman of the ...
Elk Effects, Science, and Policy Conflict Frederic H. Wagner. Two individuals emerged in the 1980s who were particularly aggressive in bringing public scrutiny onto the northern range situation. Alston Chase, former chairman of the ...
Стр. 2
Elk Effects, Science, and Policy Conflict Frederic H. Wagner. This page intentionally left blank History of the Northern Range Dispute 1 Management efforts fail.
Elk Effects, Science, and Policy Conflict Frederic H. Wagner. This page intentionally left blank History of the Northern Range Dispute 1 Management efforts fail.
Стр. 9
... effects the different policies have had on the size of the northern herd, and consequently the herd's ecological effects on the northern range, are scientific questions. The second aspect is deciding on the appropriate policy for ...
... effects the different policies have had on the size of the northern herd, and consequently the herd's ecological effects on the northern range, are scientific questions. The second aspect is deciding on the appropriate policy for ...
Стр. 10
... effect the several management phases have had on the size of the northern herd and in turn its effects on the northern range. The park-supported science is being used to sustain the natural-regulation policy and is being popularized to ...
... effect the several management phases have had on the size of the northern herd and in turn its effects on the northern range. The park-supported science is being used to sustain the natural-regulation policy and is being popularized to ...
Стр. 11
Elk Effects, Science, and Policy Conflict Frederic H. Wagner. wintering north of the park were 3,800 and 5,100 ... effect should be to ease foraging pressure on the park winter range. There already is some evidence that this may be ...
Elk Effects, Science, and Policy Conflict Frederic H. Wagner. wintering north of the park were 3,800 and 5,100 ... effect should be to ease foraging pressure on the park winter range. There already is some evidence that this may be ...
Содержание
1 | |
13 | |
Part III Elk Effects on Ecosystem Structure and Function | 57 |
Part IV The Role of Science in Policy Process | 305 |
References | 335 |
Index | 359 |
Другие издания - Просмотреть все
Yellowstone's Destabilized Ecosystem: Elk Effects, Science, and Policy Conflict Frederic H. Wagner Ограниченный просмотр - 2006 |
Yellowstone's Destabilized Ecosystem: Elk Effects, Science, and Policy Conflict Frederic H. Wagner Ограниченный просмотр - 2006 |
Yellowstone's Destabilized Ecosystem: Elk Effects, Science, and Policy Conflict Frederic H. Wagner Ограниченный просмотр - 2006 |
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abundance animals aspen authors Barmore beaver bighorn bighorn sheep biomass Bishop bison Butte Creek censuses century clones commented competition components conifers Coughenour Coughenour and Singer decades density Despain early ecological effects elk herd elk numbers elk population Engstrom ern range erosion estimates evidence exclosures factors figure forage grasses grazing habitat herbaceous herbaceous vegetation herbivory higher elevations highlining Houston hunting impacts increase indicates inferences inside the exclosures interspecific competition Kay’s Keigley Kittams lakes Lamar River levels lower measurements ment mule deer National Park northern herd northern range ecosystem observed occurred park establishment park history park’s period photographs plants processes production pronghorn r-values reduced reported result riparian riparian zones sagebrush Schullery sediment shrub significant soil species studies suggest tannin tion trees trends ungrazed ungulate Wagner Wambolt willow decline winter range Yellowstone Yellowstone National Park