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Displaying 20,511 - 20,520 of 65,202 Publications- Plant functional traits (PFTs) have increased in popularity in recent years to describe various ecosystems and biological phenomena while advancing general ecological principles. To date, few have investigated distributional attributes of individual PFTs and their relationship with key attributes and processes of forest ecosystems. The objective of this study was to quantify the distribution and contribution of various PFTs in determining forest structure, live tree production (volume and biomass), and tree mortality across the eastern US. In total, 16 metrics representing species specific...AuthorsMatthew B. Russell, Christopher W. W. Woodall, Anthony W. D'Amato, Grant M. Domke, Sassan S. SaatchiKeywordsSourceEcology and Management. 328: 1-9.Year2014
- Who uses the parks, natural areas, and waterfronts of the Jamaica Bay region, how do they use them, and why? We are systematically searching the terrain of urban green spaces for signs of human use and stewardship in order to answer this question. Social scientists and ecologists from the US Forest Service are collaborating with the NYC Department of Parks & Recreation and the Natural Areas Conservancy in a Social Assessment of 4500 acres of public green space.AuthorsLindsay K. Campbell, Erika Svendsen, Nancy Falxa Sonti, Gillian BaineSourcePLOT. 3: 90-95.Year2014
- Dendrominia burdsallii is proposed as a new species that occurs on bark of living Arbutus arizonica in southern Arizona. Its most striking feature is the very large, narrowly cylindrical to allantoid basidiospores, (30-) 37-50 × 10-12 (-13.5) µm, with hyaline, thin, smooth, acyanophilous walls.AuthorsKaren K. NakasoneKeywordsSourceNorth American Fungi. 9(2): 1-5.Year2014
- The Future Forest Webinar Series facilitated dialogue between scientists and managers about the challenges and opportunities created by the mountain pine beetle (MPB) epidemic. The series consisted of six webinar facilitated by the USFS Rocky Mountain Research Station, the Northern and Rocky Mountain Regions, and the Colorado Forest Restoration Institute. The series ran from October 2011 to December 2012 and covered a variety of topics related to the MPB epidemic: potential fire risk and behavior, current and future vegetation conditions, wildlife habitats and populations, social and...AuthorsMegan S. Matonis, Robert M. Hubbard, K. Gebert, Beth Hahn, C. ReganKeywordsSourceProceedings RMRS-P-70. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 80 p.Year2014
- Forests in northern Minnesota will be affected directly and indirectly by a changing climate over the next 100 years. This assessment evaluates the vulnerability of forest ecosystems in Minnesota's Laurentian Mixed Forest Province to a range of future climates. Information on current forest conditions, observed climate trends, projected climate changes, and impacts to forest ecosystems was considered in order to draw conclusions on climate change vulnerability. Wet Forests, Forested Rich Peatlands, and Acid Peatlands were determined to be the most vulnerable to projected changes in...AuthorsStephen Handler, Matthew Duveneck, Louis Iverson, Emily Peters, Robert M. Scheller, Kirk R. Wythers, Leslie Brandt, Patricia Butler, Maria Janowiak, P. Danielle Shannon, Chris Swanston, Kelly Barrett, Randy Kolka, Casey McQuiston, Brian J. J. Palik, Peter B. Reich, Clarence Turner, Mark White, Cheryl Adams, Anthony D'Amato, Suzanne Hagell, Patricia Johnson, Rosemary Johnson, Mike Larson, Stephen Matthews, Rebecca Montgomery, Steve Olson, Matthew Peters, Anantha M. Prasad, Jack Rajala, Jad Daley, Mae Davenport, Marla R. Emery, David Fehringer, Christopher L. Hoving, Gary Johnson, Lucinda Johnson, David Neitzel, Adena Rissman, Chadwick Rittenhouse, Robert ZielKeywordsSourceGen. Tech. Rep. NRS-133. Newtown Square, PA; U.S. Department of Agriculture, Forest Service, Northern Research Station. 228 p.Year2014
- Stratified random sampling (SRS) provides a scientifically based estimate of a population comprising mutually exclusive, homogenous subgroups. In the National Visitor Use Monitoring (NVUM) program, SRS is used to estimate recreation visitation and visitor characteristics across activities on National forests. However, with rising costs and declining budgets, carrying out an annually established SRS poses challenges in how and where to reduce sampling while maintaining statistical precision. Furthermore, any reductions must produce results that validly compare to previous years’ SRS in...AuthorsAshley E. Askew, Donald B.K. English, Stan Zarnoch, Neelam C. Poudyal, Michael BowkerKeywordsSourceGen. Tech. Rep. SRS-GTR-192. Asheville, NC: USDA-Forest Service, Southern Research Station. 21 p.Year2014
- U.S. pulpwood production amounted to 86.5 million cords in 2010, a decrease of 4 percent from 2008. Roundwood production totaled 65.7 million cords and accounted for 76 percent of the Nation's total pulpwood production. The Southern Region led the Nation in total production with 65.5 million cords, followed by the Northern Region with 12.8 million cords, and the Western States with 8.2 million cords. In 2010, 136 pulp mills were in operation drawing wood from 36 of the lower 48 states. Pulping capacity for the Nation totaled 166,096 tons per day, with southern mills accounting for 74...AuthorsRonald J. Piva, James Bentley, Steven W. HayesKeywordsSourceResour. Bull. NRS-89. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 74 p.Year2014
- Wildfire activity in the United States incurs substantial costs and losses, and presents challenges to federal, state, tribal and local agencies that have responsibility for wildfire management. Beyond the potential socioeconomic and ecological losses, and the monetary costs to taxpayers due to suppression, wildfire management is a dangerous occupation. Aviation resources, in particular large airtankers, currently play a critical role in wildfire management, and account for a relatively large share of both suppression expenditure and firefighting fatalities. A recent airtanker modernisation...AuthorsDave E. Calkin, Crystal S. Stonesifer, Matthew P. Thompson, Charles W. McHughSourceInternational Journal of Wildland Fire. 23: 259-271.Year2014
- Recent fire seasons in the western United States are some of the most damaging and costly on record. Wildfires in the wildlandurban interface on the Colorado Front Range, resulting in thousands of homes burned and civilian fatalities, although devastating, are not without historical reference. These fires are consistent with the characteristics of large, damaging, interface fires that threaten communities across much of the western United States. Wildfires are inevitable, but the destruction of homes, ecosystems, and lives is not. We propose the principles of risk analysis to provide land...AuthorsDave E. Calkin, Jack D. Cohen, Mark A. Finney, Matthew P. ThompsonKeywordsSourcePNAS. 111(2): 746-751.Year2014
- Clean water is essential for ecosystem processes and for the maintenance of human populations. However, fresh water accounts for less than three percent of the world’s total water volume. Numerous anthropogenic and natural processes impact the quality and quantity of the available resource. The value of high-quality water will likely increase as threats to water resources expand and human demands increase. In the United States, public lands such as forests and grasslands often contain watersheds that have been minimally modified by human disturbances. Wilderness areas in particular often...AuthorsAdam N. Johnson, David R. SpildieKeywordsSourceGen. Tech. Rep. RMRS-GTR-324. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 32 p.Year2014