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Full-Text Articles in Life Sciences
Predation Risk And Elk-Aspen Foraging Patterns, C.A. White, M.C. Feller
Predation Risk And Elk-Aspen Foraging Patterns, C.A. White, M.C. Feller
Aspen Bibliography
Elk-aspen foraging patterns may be influenced by cover type, distance from roads or trails, the type of user on road or trail (park visitor, human hunter, or predator), and two general states of aspen condition (open-grown or thicket). Pellet group and browse utilization transects in the Canadian Rockies showed that elk were attracted to roads used by park visitors and avoided by wolves, and that elk possibly avoided aspen and conifer patches near backcountry trails used by wolves. In high predation risk landscapes, aspen stands were dense, lightly browsed, and rarely entered by elk. As risk decreased, elk density and …
Landscape-Scale Dynamics Of Aspen In Rocky Mountain National Park, Colorado, Margot W. Kaye, Kuni Suzuki, Dan Binkley, Thomas J. Stohlgren
Landscape-Scale Dynamics Of Aspen In Rocky Mountain National Park, Colorado, Margot W. Kaye, Kuni Suzuki, Dan Binkley, Thomas J. Stohlgren
Aspen Bibliography
Past studies of quaking aspen in Rocky Mountain National Park suggested that the aspen population is declining due to intensive browsing by elk (Cervus elaphus). These studies were conducted in the elk winter range, an area of intensive elk impact. The elk summer range experiences less intense grazing pressure. We tested the hypothesis that impacts of elk would be greater in the elk winter range than the summer range with landscape-scale data from the Park. The detrimental effects of elk on aspen are highly localized and, at larger spatial scales, elk browsing does not seem to be influencing the aspen …
Multiple Factors Affect Aspen Regeneration On The Uncompahgre Plateau, West-Central Colorado, Barry C. Johnston
Multiple Factors Affect Aspen Regeneration On The Uncompahgre Plateau, West-Central Colorado, Barry C. Johnston
Aspen Bibliography
In 1996, I inventoried over 90 aspen stands in 12 timber sales that had been clearcut >3 years previously. Units that regenerated adequately were larger, had higher slope angles, and had soils with a thick Mollic surface layer. Units that regenerated inadequately often had plant species that indicated high water tables. The factors associated with inadequate regeneration were high water tables, heavy browsing, soils with a thin Mollic surface layer, and logging practices that compact large portions of the unit. One of these factors alone often does not lead to inadequate aspen sprouting. Most often, inadequately regenerated aspen stands have …
Aspen Restoration In The Blue Mountains Of Northeast Oregon, D.M. Shirley, V. Erickson
Aspen Restoration In The Blue Mountains Of Northeast Oregon, D.M. Shirley, V. Erickson
Aspen Bibliography
No abstract provided.
Quaking Aspen Reproduce From Seed After Wildfire In The Mountains Of Southeastern Arizona, Ronald D. Quinn, Lin Wu
Quaking Aspen Reproduce From Seed After Wildfire In The Mountains Of Southeastern Arizona, Ronald D. Quinn, Lin Wu
Aspen Bibliography
Quaking aspen regenerated from seed after a stand replacement wildfire in the Chiricahua Mountains of southeastern Arizona. The wildfire had created gaps in the canopy so that aspen were able to establish from seed. Seedlings were found at a mean density of 0.17 m–2, 30 m or more from the nearest potential seed trees. Six clumps of aspen seedlings contained 18–186 trees, occupying areas of 145–500 square meters at densities of 0.09-0.27 m–2. White-tailed deer (Odocoileus virginianus) browsed 14.3% of the seedlings. Occasional sexual reproduction of aspen may be a general trait of the species throughout the western portion of …