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
... each fork is an experimental result that leads to new hypothetical and experimental branches and, for our purposes here, lower organizational levels. As Popper (1979) reasons, it is never possible to prove viii Preface.
... each fork is an experimental result that leads to new hypothetical and experimental branches and, for our purposes here, lower organizational levels. As Popper (1979) reasons, it is never possible to prove viii Preface.
Стр. ix
... results in elucidating the phenomenon's causal mechanisms, and (2) with the absence of any more probable hypothesis ... result, synthetic inferences commonly do not lend themselves to explicit probability statements. Rather, probability ...
... results in elucidating the phenomenon's causal mechanisms, and (2) with the absence of any more probable hypothesis ... result, synthetic inferences commonly do not lend themselves to explicit probability statements. Rather, probability ...
Стр. xi
... result was an ecological scenario, already advocated by many archaeologists, that pre-Columbian ungulate populations in the Intermountain West had been held at low densities by native carnivores and especially by aboriginal hunting. The ...
... result was an ecological scenario, already advocated by many archaeologists, that pre-Columbian ungulate populations in the Intermountain West had been held at low densities by native carnivores and especially by aboriginal hunting. The ...
Стр. 7
... result from grazing by native ungulates. Reduction in fire frequency and climatic changes, if there were any, would be implicated. Moreover, “replacement” (= disappearance) of willow and aspen would not represent retrogressive ...
... result from grazing by native ungulates. Reduction in fire frequency and climatic changes, if there were any, would be implicated. Moreover, “replacement” (= disappearance) of willow and aspen would not represent retrogressive ...
Стр. 10
... resulting lack of ecological insight. Fair and objective synthesis demands that all of this be consulted and considered. The primary purpose of this synthesis is to review, analyze, and evaluate the existing evidence to address the ...
... resulting lack of ecological insight. Fair and objective synthesis demands that all of this be consulted and considered. The primary purpose of this synthesis is to review, analyze, and evaluate the existing evidence to address 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 |
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