Although population responses to density have been documented previously in Yellowstone, responses to precipitation have not. Correlations between elk population responses and annual precipitation were presumably consequences of plant growth responses to precipitation and subsequent effects on elk nutritional ...
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 ...
There has been an overall growth inpopulation, despite some draconian efforts to contain it. 尽管有严厉的遏制措施,人口还是在全面增长. 《简明英汉词典》 Thepopulationdensity of that country is 685 per square mile. 那个国家的人口密度为每平方英里685人. ...
The Red Desert in the southern part of the state is a high-desert ecosystem, with the nation’s biggest living dune system and desert elk herd and migratory pronghorn herd in the lower 48 states. Matthew Shepard, a 21-year-old student at the University of Wyoming, was murdered in an ...
The effects of changes in the timing of spring green-up and winter severity, two key drivers of ungulate migration in North America, have also been documented. Elk in the Greater Yellowstone Ecosystem delayed departure from winter range habitat when spring green-up occurred later [15], mule dee...
`Freezing rate' is defined as the time-dependent rate at which a population of macroscopically identical samples (e.g., drops in a volume of air) ... Vali,Gabor - 《Journal of the Atmospheric Sciences》 被引量: 2469发表: 1994年 The Northern Yellowstone Elk: Density Dependence and Climatic...
2003). Stated simply, the hypothesis says that in the absence of human exploitation, wolf density is set by prey biomass. In fact, an equation exists that converts disparately sized prey (e.g., three deer equal one elk) into common units allowing comparisons.To understand how BMI affects ...
causes of those patterns, including density-independent and density-dependent forces and the role of stochastic influences. Particular attention is given to mathematical modeling approaches that have proven useful for addressing a range of management issues, especially in the field of biodiversity ...
Predators affect prey density directly by consuming and removing prey from the environment. Additionally, predators can elicit non-consumptive effects in prey which influence prey survival by altering prey behavior and physiology. Key to understanding the consequences of non-consumptive effects for prey ...