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Celebrating 100 Years of Science! | 1925-2025
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Human impacts to Fort Union Trading Post include loss of native grass species, invasive plants and reduced river flow. Methods such as prescribed fire and the planting of native species have been used to restore and protect the site.
Fort Union Trading Post National Historic Site…
Some of the most common threats to the national parks ecosystems include those to quality of air, quality and quantity of available water, and the parks native species. Prescribed fire is used to prevent uncontrolled forest fires and to reduce the growth of nonnative species.
Generic Resources and Threats to the Northern…
While Jewel Cave is currently in pristine condition there are several threats that could potential damage this site. These threats include the pollution of ground water that seeps into the cave at various points and visitor impacts.
Jewel Cave National Monument Threats and Features
The Niobrara River is where six major biomes converge to form a rich diversity of flora and fauna. Threats to the river arise from fire exclusion leading to the expansion of ponderosa pine into grassland area, changes in microclimates, the spread of invasive plants and the high volume of visitors during peak periods.
Niobrara National Scenic River Resources and…
Diagram showing resources of and threats to Harpers Ferry National Historical Park.
Diagram showing resources of and threats to…
Diagram showing features of and threats to C&O Canal.
Diagram showing features of and threats to C&O…
Diagram showing features of and threats to Catoctin Mountain Park.
Diagram showing features of and threats to…
Illustration of Australian flag
Flag: Australia
Camping at Indian Cove in Joshua Tree National Park.
Camping
Hikers in Joshua Tree National Park.
Hiking in Joshua Tree National Park
Climbers in Joshua Tree National Park.
Climbers
Climbers in Hidden Valley of Joshua Tree National Park.
Climbers in Joshua Tree National Park
Climbers in Hidden Valley of Joshua Tree National Park.
Hidden Valley in Joshua Tree National Park
Joshua Trees (Yucca brevifolia), endemic to the Southwestern United States, near Hidden Valley in Joshua Tree National Park.
Joshua Trees (Yucca brevifolia)
Camping at Indian Cove in Joshua Tree National Park.
Campsite at Indian Cove
Hikers in Joshua Tree National Park.
Hiking in Joshua Tree National Park
Joshua Tree National Park near Indian Cove.
Joshua Tree National Park
View of Joshua Tree National Park near Indian Cove.
Joshua Tree National Park
Joshua Tree National Park near Indian Cove.
Joshua Tree National Park
Great blue heron in the Everglades at Shark Valley Visitor Center.
Great blue heron in the Everglades
View of Horseshoe Bend in Arizona.
Horseshoe Bend, Arizona
View from the North Rim of the Grand Canyon National Park.
North Rim, Grand Canyon
Morning view from the South Rim of the Grand Canyon National Park.
South Rim, Grand Canyon
Mangroves and oyster reefs at Pumpkin Bay in the Ten Thousand Islands, Florida.
Mangroves and oyster reefs
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