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. viii
... inferences from the evidence than those that have been posited by most of the published researchers since 1971 and reiterated by park personnel since that date. This divergence of views raises the entire question of the role of science ...
... inferences from the evidence than those that have been posited by most of the published researchers since 1971 and reiterated by park personnel since that date. This divergence of views raises the entire question of the role of science ...
Стр. ix
... inferences commonly do not lend themselves to explicit probability statements. Rather, probability judgments are subjective and comparative: That is, judgments are made as to which of two or more inferences is most consonant with the ...
... inferences commonly do not lend themselves to explicit probability statements. Rather, probability judgments are subjective and comparative: That is, judgments are made as to which of two or more inferences is most consonant with the ...
Стр. x
... inferences drawn in this synthesis are contrary to those drawn by other authors. In all cases I have followed the previously described criteria by considering those authors' views, weighed their evidence, and explained why I consider my ...
... inferences drawn in this synthesis are contrary to those drawn by other authors. In all cases I have followed the previously described criteria by considering those authors' views, weighed their evidence, and explained why I consider my ...
Стр. 7
... inferences about the northern range held during phases 2 and 3 and supported the tenets of Houston's 1971 natural-regulation hypothesis. Soon after its enunciation, considerable skepticism arose in the scientific community about the ...
... inferences about the northern range held during phases 2 and 3 and supported the tenets of Houston's 1971 natural-regulation hypothesis. Soon after its enunciation, considerable skepticism arose in the scientific community about the ...
Стр. 9
... inferences should not be influenced by it. There has been a pervasive failure to separate these two aspects. The ... inference. Park scientists have been in an especially difficult position. The policy was articulated in 1967, the ...
... inferences should not be influenced by it. There has been a pervasive failure to separate these two aspects. The ... inference. Park scientists have been in an especially difficult position. The policy was articulated in 1967, the ...
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