J. 1996 Elk population pro- cesses in Yellowstone National Park under the policy of natural regulation. Ecol. Applic. 6, 573-593.Coughenour, M.B. & Singer, F.J. (1996) Elk population processes in Yellowstone National Park under the pol- icy of Natural Regulation. Ecological Applications,...
All this growth and development isthreatening Greater Yellowstone's stunning but vulnerable ecosystem. Many species of large mammals, including elk, bison and bighorn sheep, migrate in and out of the national parks and forests. They depend on habitats on private lands that were onc...
A pivotal "natural" question in Yellowstone National Park management is the size of the northern-range, wintering elk population at Park establishment in 1872, argued both to have been small and large. Integrating and quantifying several sources of evidence provides a consistent picture of a low ...
During the 1990s, mountain lion (Felis concolor) and grizzly bear (Ursus arctos) numbers increased in Jackson Hole, Wyoming, and gray wolves (Canis lupus) were reintroduced to the Greater Yellowstone Ecosystem. We investigated effects of these predators, as well as black bears (Ursus americanus)...
wintering elk in Yellowstone's northern range were present in low numbers prior to and at park establishment in 1872; increased to 20,000-35,000 by the early 1900s when they heavily impacted the northern-range ecosystem; and declined to 3,172 censused animals in 1968 due to park control ...
IN the Yellowstone National Park, the two great herds of wapati or 'elk' now comprise about 30,000 individuals, and in the northern area the drought-reduced pastures have accentuated a long-standing problem of over-population (Science Service, Washington, D.C.). The fundamental cause of the...
A census ofpopulationis taken every ten years. 人口普查每10年进行一次. 《简明英汉词典》 Thepopulationis mounting up steadily. 人口稳步增长. 《简明英汉词典》 There has been an overall growth inpopulation, despite some draconian efforts to contain it. ...
Unlike wolf reintroductions in Yellowstone and the northern United States, wildlife managers in the Southwest are faced with a climate that has encouraged a year-round calving season, meaning conflicts between livestock and wolves are constant rather than just a few months out of the year. ...
BOX 12.1 Bison in Wood Buffalo National Park 13 Wolf Predation on Elk in a Multi-Prey Environment BOX 13.1 Generalizing Wolf-Prey Dynamics across Systems: Yellowstone, Banff, and Isle Royale BOX 13.2 The Predator’s Perspective: Biomass of Prey BOX 13.3 Lessons from Denali National Park:...
Yellowstone National ParkA growing number of studies suggest ratio-dependence may be common in many predator–prey systems, yet in large mammal systems, evidence is limited to wolves and their prey in Isle Royale and Yellowstone. More importantly, the consequences of ratio-dependent predation have ...