Treesearch
Displaying 23,901 - 23,910 of 65,208 Publications- Large scale, high-severity fires are increasing in the western United States. Despite this trend, there have been few studies investigating post-fire tree regeneration. We established a study in the footprint of the 2000 Storrie Fire, a 23,000 ha wildfire that occurred in northern California, USA. We used a stratified sampling design to quantify post-fire vegetation dynamics across four levels of burn severity and three forest types on the Lassen National Forest nine and ten years following fire. Within each sampled stand, we recorded tree seedlings, forest overstory, shrub cover, and...AuthorsJustin S. Crotteau, Morgan Varner, Martin RitchieKeywordsSourceForest Ecology and Management 287:102-113Year2012
- Agaricus bisporus is the model fungus for the adaptation, persistence,and growth in the humic-rich leaf-litter environment. Aside from its ecological role, A. bisporus has been an important component of the human diet for over 200 y and worldwide cultivation of the "button mushroom" forms a multibillion dollar industry. We present two A. bisporus genomes, their gene repertoires and transcript profiles on compost and during mushroom formation. The genomes encode a full repertoire of polysaccharide-degrading enzymes similar to that of wood-decayers. Comparative transcriptomics of mycelium...AuthorsEmmanuelle Morin, Annegret Kohler, Adam R. Baker, Marie Foulongne-Oriol, Vincent Lombard, Laszlo G. Nagy, Robin A. Ohm, Aleksandrina Patyshakuliyeva, Annick Brun, Andrea L. Aerts, Andrew M. Bailey, Christophe Billette, Pedro M. Coutinho, Greg Deakin, Harshavardhan Doddapaneni, Dimitrios Floudas, Jane Grimwood, Kristiina Hildén, Ursula Kües, Kurt M. LaButti, Alla Lapidus, Erika A. Lindquist, Susan M. Lucas, Claude Murat, Robert W. Riley, Asaf A. Salamov, Jeremy Schmutz, Venkataramanan Subrananian, Han A.B. Wösten, Jianping Xu, Daniel C. Eastwood, Gary D. Foster, Anton S.M. Sonnenberg, Daniel Cullen, Ronald P. de Vries, Taina Lundell, David S. Hibbett, Bernard Henrissat, Kerry S. Burton, Richard W. Kerrigan, Michael P. Challen, Igor V. Grigoriev, Francis MartinSourcePNAS, October 23, 2012, Volume 109, Number 43, 17501–17506, 2012.Year2012
- New approaches for wood protection based on green technologies have increased interest in using heartwood portions of certain wood species for the effects (toxic and antioxidant properties, chelate formation, hydrophobicity) of extractives located in heartwood. This study evaluated the biological performance of heartwood of Liquidambar orientalis Mill., trees well-known for production of balsam. Heartwood specimens were subjected to soil-block decay tests based on the American Wood Protection Association standard method using two brown-rot and two white-rot fungi. Specimens were also...AuthorsEvren Terzi, S. Nami Kartal, Claudia Marcela Ibáñez, Coþkun Köse, Rachel A. Arango, Carol A. Clausen, Frederick GreenKeywordsSourceBiodeterioration & Biodegradation , 75 (2012). pp. 104-108.Year2012
- The Federal Highway Administration is sponsoring a comprehensive research program on Historic Covered Timber Bridges in the USA. This national program's main purpose is to develop improved methods to preserve, rehabililate, and restore the timber bridge trusses that were developed during the early 1800s, and in many cases are still in service today. The overall goal of the National Historic Covered Bridge Preservation Program is to preserve thes iconic bridge structures for future generations. One of the many ongoing studies is aimed at establishing a procedure for safely and reliably...AuthorsTravis Hosteng, James Wacker, Brent PharesKeywordsSourceIn: WCTE Auckland new Zealand, 15-19 July 2012, World Conference on Timber Engineering; pp. 346-355, 2012.Year2012
- Copulas have become an important analytic tool for characterizing multivariate distributions and dependence. One is often interested in simulating data from copula estimates. The process can be analytically and computationally complex and usually involves steps that are unique to a given parametric copula. We describe an alternative approach that uses \probability{proportional{to{size" (PPS) random sampling with weights formed from the copula likelihood function. The method is exible and can be applied to parametric and nonparametric marginal density estimates. The precision of the...AuthorsBarry GoodwinSourceIn: Agricultural and Applied Economics Association 2012 Annual Meeting, August 12-14, 2012, Seattle, Washington. http://purl.umn.edu/124868.Year2012
- To increase timber production and manage other forest resource values, some land managers have undertaken logging debris and vegetation control treatments after forest harvest. We explored the roles of clearcutting on plant community composition and structure at three sites where logging debris was dispersed, piled, or removed and vegetation was annually treated or not treated with herbicides for 5 years. Without vegetation control, a competitive relation was identified between exotic and native ruderal (i.e., disturbance-associated) species. When exotic ruderal cover changed by 4 percent,...AuthorsDavid H. Peter, Timothy B. HarringtonSourceRes. Pap. PNW-RP-589. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 37 pYear2012
- The purpose of this manual is to enable users of the Global Forest Products Model to: • Install and run the GFPM software • Understand the input data • Change the input data to explore different scenarios • Interpret the output The GFPM is an economic model of global production, consumption and trade of forest products (Buongiorno et al. 2003). The GFPM2012 has data and parameters to produce forecasts of forest resources and markets for 180 countries, and 14 forest product (commodity) categories, from 2009 to 2030. Zhu et al. (2008) describe how to update, calibrate, and validate the model...AuthorsJoseph Buongiorno, Shushuai ZhuSourceStaff Paper Series # 74, Department of Forest and Wildlife Ecology, University of Wisconsin, Madison WisconsinYear2012
- Spatial and temporal relationships among agricultural prices have been an important topic of applied research for many years. Such research is used to investigate the performance of markets and to examine linkages up and down the marketing chain. This research has empirically evaluated price linkages by using correlation and regression models and, later, linear and nonlinear time-series models. The most recent research has recognized the fact that price linkages at different locations or levels of the market may be subject to the influences of adjustment and transactions costs. The results...AuthorsBarry Goodwin, Xuan ChiSourceAgricultural and Applied Economics Association 2012 Annual Meeting, August 12-14, 2012, Seattle, Washington. Available at http://purl.umn.edu/124634.Year2012
- The U.S. Department of Agriculture, Forest Service (USFS) has, in recent years, increasingly emphasized the importance of safety to its employees, but wildfire management remains a risky endeavor. While wildfire management decisions affecting safety and exposure of firefighters to the wildland fire environment may be aided by decision support tools such the Wildfire Decision Support System, use of such tools may be influenced by the way information is presented and by manager responses to risk. A recent survey of wildfire managers conducted by the USFS Rocky Mountain Research Station and...AuthorsMichael Hand, Dave E. Calkin, Matthew WibbenmeyerKeywordsSourceRes. Note RMRS-RN-50WWW. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 38 p.Year2012
- Sistotrema brinkmannii (Bres.) J. Erikss. (Basidiomycotina, Hydanaceae), commonly regarded as a wood decay fungus, was consistently isolated from bareroot nursery Pinus banksiana Lamb. seedlings. S. brinkmannii was found in ectomycorrhizae formed by Thelephora terrestris Ehrh., Laccaria laccata (Scop.) Cooke, and Suillus luteus (L.) Roussel. In pure culture combinations with sterile P. banksiana and Populus tremuloides Michx. seedlings, S. brinkmannii colonized root cortical cells while not killing seedlings. Colonization by S. brinkmannii appeared to be intracellular but typical endo- or...AuthorsLynette Potvin, Dana L. Richter, Martin F. Jurgensen, Kas DumroeseSourceMycorrhiza. 22: 631-638.Year2012