Yellowstone National Park: Natural and Cultural Significance

Yellowstone National Park is a protected landscape that preserves some of the world's most important geological features and natural processes. It is also an extraordinary expression of geothermal activity, scenic beauty, and functioning wild ecosystems in which rare and threatened species continue to survive. As one of the few remaining large, relatively intact ecosystems in the northern temperate region of the planet, Yellowstone provides exceptional opportunities to protect, research, and experience natural processes on a vast wilderness scale.

Yellowstone contains an extraordinary range of scenic attractions. Among its most remarkable features are the greatest concentration of geysers anywhere in the world, the spectacular Grand Canyon of the Yellowstone River, numerous waterfalls, and large populations of wildlife that gather throughout the park.

Yellowstone ranks among the world's most important places for understanding and appreciating the Earth's geological evolution. Its geothermal features are unmatched in their global combination and include thousands of hot springs, mudpots, and fumaroles, as well as more than half of all active geysers found worldwide.

The park also contains extensive fossil deposits in which nearly 150 species of fossil plants have been identified. These range from small ferns and rushes to large Sequoia and numerous other types of trees. Yellowstone also encompasses the world's largest recognized caldera, measuring approximately 45 kilometers by 75 kilometers, or 27 miles by 45 miles.

Yellowstone is among the few remaining large, intact ecosystems in the northern temperate zone of the Earth. The park's plant communities are permitted to develop through natural ecological succession without direct human management. When wildfires are caused by lightning, they are often allowed to continue burning when conditions permit, allowing the natural role of fire to periodically influence the ecosystem.

The park's bison are the only remaining wild and continuously free-ranging population descended from the herds that once spread across the Great Plains. Together with the park's other wildlife, they remain among Yellowstone's most important attractions.

Yellowstone National Park has developed into one of North America's most important refuges for rare species of plants and animals, while also serving as an important example for understanding ecosystem processes. The park's grizzly bear population is among the most extensively researched and best understood bear populations anywhere in the world. Studies of these bears have contributed significantly to knowledge about the interconnected relationships that exist within ecosystems.

Protecting Yellowstone's plants and animals, together with the natural processes that influence their populations and distribution, allows biological evolution to continue with relatively little human interference.

Integrity

Covering almost 900,000 hectares, Yellowstone National Park is itself a substantial protected area and forms the core of the much larger Greater Yellowstone Ecosystem, or GYE, which encompasses more than 7 million hectares. Yellowstone and the surrounding GYE together represent one of the last remaining large, intact ecosystems in the northern temperate zone.

All wildlife species known to have inhabited the region before European contact can still be found within the park. Yellowstone is also large enough to safeguard the scenic, geological, and geomorphological characteristics for which it received its designation.

Only around 2 percent of the park has been developed for visitor facilities, park infrastructure, roads, and related uses. More than 90 percent is managed according to wilderness principles and experiences comparatively limited visitor use.

The ecological health of the park was substantially strengthened by the reintroduction of gray wolves in 1994–95. Their return produced beneficial effects across numerous species and ecological functions, including impacts involving aspen and trout.

Nevertheless, several threats to the park's integrity remain. Invasive species, particularly lake trout, present ongoing concerns, while climate change could also have significant consequences. Yellowstone's management plans include a variety of resource-protection strategies, including environmental assessments, land-use zoning, ecological integrity monitoring, visitor monitoring, and educational programs designed to address pressures originating both within and beyond the park.

Protection and Management Requirements

Yellowstone was designated by the United States Congress in 1872 as the world's first national park. Today, it is administered under the authority of the Organic Act of August 25, 1916, which created the United States National Park Service. The park also operates under specific enabling legislation that establishes broad congressional guidance concerning its primary purposes. Daily administration is overseen by the Park Superintendent.

The park's management priorities and objectives have been established through a General Management Plan. In more recent years, this framework has been supplemented by planning efforts focused on individual locations, as well as numerous plans addressing particular resources and management concerns. The National Park Service also maintains Management Policies that provide general guidance for all National Park Service units, including Yellowstone.

Cooperation Beyond Park Boundaries

Safeguarding some aspects of Yellowstone's Outstanding Universal Value depends on cooperation with neighboring land managers and private landowners. This is especially important for wildlife species that travel across large areas, including grizzly bears, gray wolves, and particularly bison.

Increasing development both around and within the Greater Yellowstone Ecosystem raises concerns about its potential effects on wildlife movement. Neighboring states also have particular concerns about bison traveling beyond Yellowstone's boundaries. At the same time, efforts to extend bison corridors beyond the park have achieved success along its northern and western boundaries.

Managing visitors throughout the year remains another continuing challenge. Park officials must maintain appropriate public access while ensuring that increased visitation does not diminish Yellowstone's distinctive natural qualities. Visitor-related impacts can include everything from the physical presence of infrastructure to air pollution, making continued monitoring essential.

The national park coordinates closely with other land-management agencies throughout the Greater Yellowstone Ecosystem through the Greater Yellowstone Coordinating Committee, or GYCC. Yellowstone was also designated as a Biosphere Reserve in 1976.

Long-Term Monitoring and Conservation

Protecting Yellowstone effectively over the long term requires continued observation of changing resource conditions. One important mechanism is the National Park Service Inventory and Monitoring, or I&M, program.

Yellowstone belongs to the Greater Yellowstone I&M network, which has identified a series of "vital signs" used to monitor selected physical, chemical, and biological components and processes. These indicators are intended to provide an overall picture of the condition and health of park resources.

Within Yellowstone National Park, monitored vital signs include land use, climate, amphibians, water resources, whitebark pine, and other important ecological indicators. Continued attention to these measurements helps managers understand changes within the park and respond to potential threats to its long-term ecological integrity.