Yosemite National Park Environmental Factors

Threats to park resources and the integrity of park ecosystems include loss of natural fire regimes, air pollutants and air-borne contaminants, global climate change, direct impacts to resources from high visitation in some areas of the park, habitat fragmentation from both outside and inside park boundaries, and the invasion of non-native plant and animal species. The park is actively attempting to control the non-native plant species that pose the most serious threat, such as spotted knapweed, yellow star-thistle, bull thistle, and Himalayan blackberry. The presence of wild turkeys, white-tailed ptarmigan, bullfrogs, introduced fish and other non-native animal species in Yosemite threaten the park's native species.

Additional Nature and Science Topics for Yosemite

$6500
In recent decades, no bike model has enjoyed the grand tour success of Pinarello's Dogma line, and with the release of...
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Featured Park
Two deserts, two large ecosystems whose characteristics are determined primarily by elevation, come together at Joshua Tree National Park. The Colorado Desert encompasses the eastern part of the park and features natural gardens of creosote bush...
Featured Wildlife
Maine ocean islands provide the only nesting sites for Atlantic puffins in the United States. Eastern Egg Rock in the midcoast region, Seal Island and Matinicus Rock at the mouth of Penobscot Bay, and Machias Seal Island and Petit Manan Island off the downeast coast provide habitat for more than 4,000 puffins each summer.