Download or read book Forest Disturbance History in the Sawtooth Mountains of Central Idaho and the Beaverhead Range of Western Montana written by Joshua Albert Gage and published by . This book was released on 2008 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies of disturbance history are important because they provide a framework for understanding the ecological response to past, present, and future climate change, and this information is useful for paleoecological researchers and land-use managers. Fire and insect outbreaks are common occurrences in western forests, and three studies were undertaken to increase our knowledge of their history in the northern Rocky Mountains. In the first study, sediment cores were sampled from 21 lakes located in forests experiencing mountain pine beetle infestation in the Sawtooth Mountains, Idaho. Cores were analyzed to determine whether or not mountain pine beetle remains were accumulating in the lake sediments in association with recent outbreaks. The study found that insect remains were sparse in the lake sediments, even in sites surrounded by heavily infested forests. These results cast doubt on whether paleo-beetle records can be reconstructed from lake-sediment cores. In the second study, one-meter-long sediment cores were taken from three lakes in Pinus contorta forests in the Sawtooth Mountains, Idaho, to reconstruct a historical record of fire spanning the last 2000 years. High-resolution charcoal analysis of the cores indicated changes in fire activity, but there was not a significant difference in fire occurrence during the relatively dry Medieval Climate Anomaly (1050 - 650 cal yr BP), the cooler Little Ice Age (750 - -50 cal yr BP), and the present day. Results suggest that the current fire regime has persisted for at least 2000 years, with little modification by humans or climate. In the third study, a high-resolution charcoal record was analyzed from Reservoir Lake in the Beaverhead Mountains, Montana to reconstruct the fire history of the last 15,000 years at the lower forest-steppe boundary. The charcoal record indicates relatively low fire frequency between 13,500 cal yr BP and 6000 cal yr BP and increased fire activity from 6000 to 1500 cal yr BP, suggesting increasing aridity in the middle and late Holocene. The fire-climate linkages observed in the paleoecological record provide insights that are useful in understanding future fire regimes with projected climate changes.
Download or read book Sawtooth National Forest Idaho written by United States. Forest Service. Intermountain Region and published by . This book was released on 1939 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sawtooth National Recreation Area written by United States. Congress. House. Committee on Interior and Insular Affairs. Subcommittee on National Parks and Recreation and published by . This book was released on 1969 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sawtooth Mountain Area Study Idaho written by Victor Goodwin and published by . This book was released on 1965 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sawtooth National Forest Idaho written by United States. Forest Service. Intermountain Region and published by . This book was released on 1939 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Historical Information Report Sawtooth National Forest written by United States and published by . This book was released on 1941 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sawtooth National Forest Idaho written by United States. Forest Service and published by . This book was released on 1939 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sawtooth National Forest Idaho written by United States. Forest Service. Intermountain Region and published by . This book was released on 1939 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sawtooth Mountain Area Study Idaho written by Victor Goodwin and published by . This book was released on 1965 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Holocene and Latest Pleistocene Glaciation in the Sawtooth Mountains Central Idaho written by Brandon Mijal and published by . This book was released on 2008 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Beaverhead Impact Structure SW Montana and Idaho Implications for the Regional Geology of the Western U S written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guidebook to the Geology of Eastern Idaho written by Scott Stevens Hughes and published by . This book was released on 1999 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Ecological Characterization of Rocky Mountain Montane and Subalpine Wetlands written by and published by . This book was released on 1986 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ungulate Migrations of the Western United States written by Matthew J. Kauffman and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Early Days in the Forest Service written by United States. Forest Service and published by . This book was released on with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rocky Mountain Birds written by Paul Johnsgard and published by Lulu.com. This book was released on 2011-11-04 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Part I outlines the habitats, ecology, and bird geography of the Rocky Mountains north of the New Mexico-Colorado border, including recent changes in the ecology and avifauna of the region. It provides detailed lists of major birding locations and guidance about where to search for specific Rocky Mountain birds. Part 2 considers all 328 regional species individually, with information on their status, habitats and ecology, suggested viewing locations, and population."--Back cover
Download or read book Our National Parks written by John Muir and published by Read Books Ltd. This book was released on 2013-03-05 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: First published in 1901, “Our National Parks” is a fantastic guide to the wild mountain forest reservations and national parks of the United States, exploring their beauty and usefulness in an attempt to encourage contemporary readers to go out and enjoy the natural wonders of North America. John Muir (1838–1914) was an influential Scottish-American naturalist, environmental philosopher, botanist, zoologist, author, and glaciologist who famously fought to preserve wilderness in the United States of America. Muir's work describing his adventures in nature have been read by millions the world over and his activism has helped to conserve such important places of natural beauty as the Yosemite Valley and Sequoia National Park in America. Contents include: “The Wild Parks and Forest Reservations of the West”, “The Yellowstone National Park”, “The Yosemite National Park”, “The Forests of the Yosemite Park”, “The Wild Gardens of the Yosemite Park”, “Among the Animals of the Yosemite”, “Among the Birds of the Yosemite”, “The Fountains and Streams of the Yosemite National Park”, etc. Other notable works by this author include: “My First Summer in the Sierra” (1911), “Steep Trails” (1918), and “The Story of My Boyhood and Youth” (1913). A Thousand Fields is republishing this classic book now complete with a biographical sketch of the author.
