Yellowstones Destabilized Ecosystem.pdf

Yellowstones Destabilized Ecosystem

Frederic H. Wagner

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 Yellowstones 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 nations most cherished natural areas. Wagners book will generate substantial attention and debate both in the scientific and policy/management communities.

Historic and photographic evidence of the northern range shows the absence of browsing highlines on conifers in early park years (pre-1900), their general appearance by the early 1900s, and widespread existence to the present. Architectural analysis of conifer morphology indicates an early period of light or no browsing followed by a period of heavy use, with some evidence … Edika, tome 11 : Orteils coincés | Edika | download

9.12 MB DATEIGRÖSSE
0198033796 ISBN
Englisch SPRACHE
Yellowstones Destabilized Ecosystem.pdf

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Sofia Voigt

Photo taken 7/17/1997 Decadent (biting the dust) Aspen in the northern Greater Yellowstone Ecosystem (northern range). All trees are 100-130 years of age. No new development since the root grows (ramets) have been totally eaten by Elk. (Page 66 in Yellowstone\'s destabilized environment by Frederic H. Wagner) Slide 5

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Matteo Müller

Yellowstone's destabilized ecosystem : elk … Get this from a library! Yellowstone's destabilized ecosystem : elk effects, science, and policy conflict. [Frederic H Wagner] -- The author is a strong critic of ecological practices in the national parks and provides an assessment of the ecological history of Yellowstone's northern range since before the park existed, showing

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