The vegetation in Yosemite National Park changed during the 20th century and may change in the 21st century in response to climate change. Vegetation surveys made during the 1930s and the 1990s provide benchmark records separated by 60 years. This study uses the MC1 dynamic global vegetation model to forecast...
In the following pages the national forests of California are described and an account is given of their value to the public welfare and of the means and methods used by the United States Forest Service to make them contribute as much as possible, both now and in the future,...
This thesis develops a geology training manual for the Interpretation staff of Craters of the Moon National Monument and Preserve (CRMO) in southern Idaho. The manual will help the staff convey geologic principles to park visitors who are experiencing a landscape formed by volcanic processes. Basic geology and the most...
The use of semi-volatile organic compounds (SOCs) as molecular markers to identify the contributions of regional and long-range atmospheric transport, as well as current and historic sources, and contaminant deposition in remote ecosystems of the Western U.S. was investigated. Trans-Pacific air masses influenced by Siberian biomass burning events had elevated...
Between 1927 and 1930 the Nevada Contracting Company of Fallon, Nevada constructed the Zion Tunnel and a portion of the Zion-Mt. Carmel Highway in Zion National Park, Utah. During the construction approximately 200 workers lived at the contractor's camp, known today as the Nevada Camp. This camp, a temporary work...