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"Yellowstone"
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Yellowstone cougars : ecology before and during wolf restoration
\"Examines the effect of wolf restoration on cougar population in Yellowstone National Park. No other study has addressed theoretical and practical aspects of competition between large carnivores. A thorough examination of cougar ecology, how they interact and [are] influenced by wolves, how this knowledge informs management and conservation\"--Provided by publisher.
Book
Ecological dynamics on Yellowstone's Northern Range
Ecological Dynamics on Yellowstone's Northern Range discusses the complex management challenges in Yellowstone National Park. Controversy over the National Park Service's approach of \"natural regulation\" has heightened in recent years because of changes in vegetation and other ecosystem components in Yellowstone's northern range. Natural regulation minimizes human impacts, including management intervention by the National Park Service, on the park ecosystem. Many have attributed these changes to increased size of elk and other ungulate herds.
This report examines the evidence that increased ungulate populations are responsible for the changes in vegetation and that the changes represent a major and serious change in the Yellowstone ecosystem. According to the authors, any human intervention to protect species such as the aspen and those that depend on them should be prudently localized rather than ecosystem-wide. An ecosystem-wide approach, such as reducing ungulate populations, could be more disruptive. The report concludes that although dramatic ecological change does not appear to be imminent, approaches to dealing with potential human-caused changes in the ecosystem, including those related to climate change, should be considered now. The need for research and public education is also compelling.
eBook
American wolf : a true story of survival and obsession in the West
The story of the rise of a Yellowstone wolf, and what her life and death tell us about the struggle for the American West. -- Provided by publisher.
Book
Diel predator activity drives a dynamic landscape of fear
A \"landscape of fear\" (LOF) is a map that describes continuous spatial variation in an animal's perception of predation risk. The relief on this map reflects, for example, places that an animal avoids to minimize risk. Although the LOF concept is a potentially unifying theme in ecology that is often invoked to explain the ecological and conservation significance of fear, little is known about the daily dynamics of an LOF. Despite theory and data to the contrary, investigators often assume, implicitly or explicitly, that an LOF is a static consequence of a predator's mere presence within an ecosystem. We tested the prediction that an LOF in a large-scale, free-living system is a highly dynamic map with \"peaks\" and \"valleys\" that alternate across the diel (24-h) cycle in response to daily lulls in predator activity. We did so with extensive data from the case study of Yellowstone elk (Cervus elaphus) and wolves (Canis lupus) that was the original basis for the LOF concept. We quantified the elk LOF, defined here as spatial allocation of time away from risky places and times, across nearly 1,000-km² of northern Yellowstone National Park and found that it fluctuated with the crepuscular activity pattern of wolves, enabling elk to use risky places during wolf downtimes. This may help explain evidence that wolf predation risk has no effect on elk stress levels, body condition, pregnancy, or herbivory. The ability of free-living animals to adaptively allocate habitat use across periods of high and low predator activity within the diel cycle is an underappreciated aspect of animal behavior that helps explain why strong antipredator responses may trigger weak ecological effects, and why an LOF may have less conceptual and practical importance than direct killing.
Journal Article
Despite a century of warming, increased snowfall has buffered the ice phenology of North America’s largest high-elevation lake against climate change
Lakes are sentinels of environmental change. In cold climates, lake ice phenology—the timing and duration of ice cover during winter—is a key control on ecosystem function. Ice phenology is likely driven by a complex interplay between physical characteristics and climatic conditions. Under climate change, lakes are generally freezing later, melting out earlier, and experiencing a shorter duration of ice cover; however, few long-term records exist for large, high-elevation lakes which may be particularly vulnerable to climate impacts. Here, we quantified ice phenology over the last century (1927–2022) for North America’s largest high-elevation lake—Yellowstone Lake—and compared it to seven similar lakes in northern Europe. We show that contrary to expectation, the ice phenology of Yellowstone Lake has been uniquely resistant to climate change. Indeed, despite warming temperatures in the region, no change in the timing nor duration of ice cover has occurred at Yellowstone Lake due to buffering by increased snowfall. However, with projections of continued warming and shifting precipitation regimes in the high Rocky Mountains, it is unclear how long this buffering will last.
Journal Article
Good night, Yellowstone
\"A wonderful introduction to the worlds first national park, this guide to Yellowstone covers many of the park's most interesting places and features, including Yellowstone Lake, Morning Glory Pool, American bison, Yellowstone River, Old Faithful, grizzly bears, the Grand Canyon of Yellowstone, Mammoth Hot Springs, Firehole River, park rangers, Paint Pot Trail, campers, and wolves.\"--Amazon.com.
Book
Crimes against nature
Crimes against Nature reveals the hidden history behind three of the nation's first parklands: the Adirondacks, Yellowstone, and the Grand Canyon. Focusing on conservation's impact on local inhabitants, Karl Jacoby traces the effect of criminalizing such traditional practices as hunting, fishing, foraging, and timber cutting in the newly created parks. Jacoby reassesses the nature of these \"crimes\" and provides a rich portrait of rural people and their relationship with the natural world in the late nineteenth and early twentieth centuries.
eBook
Identifying impediments to long‐distance mammal migrations
In much of the world, the persistence of long‐distance migrations by mammals is threatened by development. Even where human population density is relatively low, there are roads, fencing, and energy development that present barriers to animal movement. If we are to conserve species that rely on long‐distance migration, then it is critical that we identify existing migration impediments. To delineate stopover sites associated with anthropogenic development, we applied Brownian bridge movement models to high‐frequency locations of pronghorn (Antilocapra americana) in the Greater Yellowstone Ecosystem. We then used resource utilization functions to assess the threats to long‐distance migration of pronghorn that were due to fences and highways. Migrating pronghorn avoided dense developments of natural gas fields. Highways with relatively high volumes of traffic and woven‐wire sheep fence acted as complete barriers. At crossings with known migration bottlenecks, use of high‑quality forage and shrub habitat by pronghorn as they approached the highway was lower than expected based on availability of those resources. In contrast, pronghorn consistently utilized high‑quality forage close to the highway at crossings with no known migration bottlenecks. Our findings demonstrate the importance of minimizing development in migration corridors in the future and of mitigating existing pressure on migratory animals by removing barriers, reducing the development footprint, or installing crossing structures.
Journal Article