Yellowstone's destabilized ecosystem: elk effects, science and policy conflict
Auteur :
Wagner, Frederic H.
Éditeur :
Oxford University Press Inc
ISBN :
9780195148213
Date de publication :
8 juin 2006
Dimensions :
23,7 x 16,2 x 2,3 cm
Poids :
694 g
Langue :
Anglais
Pays d'origine :
USA
Provides an assessment of the ecological history of Yellowstone's northern range, showing the impact of US Park Service policies on the health of the areas they oversee. This book shows 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.