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. vii
... Park, known as the northern range. It is the winter range of the largest of ... park and migrate to lower elevations to winter. Up until 1989, the northern ... establishment in 1872, and a plethora of research on the effects of elk on ...
... Park, known as the northern range. It is the winter range of the largest of ... park and migrate to lower elevations to winter. Up until 1989, the northern ... establishment in 1872, and a plethora of research on the effects of elk on ...
Стр. 3
... establishment of Yellowstone National Park in 1872. Early park officials considered that elk populations in the region had been held at low densities prior to European contact by carnivorous predators and aboriginal hunting. They opined ...
... establishment of Yellowstone National Park in 1872. Early park officials considered that elk populations in the region had been held at low densities prior to European contact by carnivorous predators and aboriginal hunting. They opined ...
Стр. 4
... park personnel for nearly a century until challenged in the 1960s and 1970s. The second management phase began with park establishment and continued for approximately a half century. Its protocol was protection, with Native Americans ...
... park personnel for nearly a century until challenged in the 1960s and 1970s. The second management phase began with park establishment and continued for approximately a half century. Its protocol was protection, with Native Americans ...
Стр. 9
... park officials and reported to Congress as indicating that the northern ... Establishing the truth of what effects the different policies have had on ... established policy.” But agency research largely continued to support the hypothesis ...
... park officials and reported to Congress as indicating that the northern ... Establishing the truth of what effects the different policies have had on ... established policy.” But agency research largely continued to support the hypothesis ...
Стр. 10
... park entrances. All assure the reader that its policies are appropriate and achieving sound management. These ... establishment, characterized by movement of wintering elk out of the park to foraging areas north of the park and reduction ...
... park entrances. All assure the reader that its policies are appropriate and achieving sound management. These ... establishment, characterized by movement of wintering elk out of the park to foraging areas north of the park and reduction ...
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 |
Часто встречающиеся слова и выражения
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