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Displaying 4,151 - 4,160 of 65,126 Publications- Urgency of Precipitation Intensity-Duration-Frequency (IDF) estimation using the most recent data has grown significantly due to recent intense precipitation and cloud burst circumstances impacting infrastructure caused by climate change. Given the continually available digitized up-to-date, long-term, and fine resolution precipitation dataset from the United States Department of Agriculture Forest Service’s (USDAFS) Experimental Forests and Ranges (EF) rain gauge stations, it is both important and relevant to develop precipitation IDF from onsite dataset (Onsite-IDF) that incorporates the...AuthorsSourav Mukherjee, Devendra M. Amatya, Anna M. Jalowska, John Campbell, Sherri Johnson, Kelly J. Elder, Sudhanshu Panda, Johnny M. Grace, Duncan KikoyoKeywordsSourceStochastic Environmental Research and Risk AssessmentYear2023
- Empirical assessment of how forest disturbance affects streamflow has been traditionally limited to small, experimental catchments. However, larger catchments where landscape management occurs have emergent drivers of streamflow at scale, and thus may exhibit novel responses to land cover disturbance. We used statistical models of water yield and annual maximum peak streamflow for multiple large (> 50 km2) forested catchments in the low-relief glaciated region of central North America to investigate how forest disturbance and climatic variability affect water yield and peak flows in...AuthorsDiana L. Karwan, Robert A. Slesak, Jody Vogeler, Zachary P. McEachran, Gordon ReeseSourceHydrological ProcessesYear2023
- The problem of global amphibian declines has prompted extensive research over the last three decades. Initially, the focus was on identifying and characterizingthe extent of the problem, but more recently efforts have shifted to evidence-based research designed to identify best solutions and to improve conservation outcomes. Despite extensive accumulation of knowledge on amphibian declines, there remain knowledge gaps and disconnects between science and action that hamper our ability to advance conservation efforts. Using input from participants at the ninth World Congress of Herpetology,...AuthorsEvan H. Campbell Grant, Staci M. Amburgey, Brian Gratwicke, Victor Acosta Chaves, Anat M. Belasen, David Bickford, Carsten A. Brühl, Natalie E. Calatayud, Nick Clemann, Simon Clulow, Jelka Crnobrnja‐Isailovic, Jeff Dawson, David A. De Angelis, C. Kenneth Dodd, Annette Evans, Gentile Francesco Ficetola, Mattia Falaschi, Sergio González‐Mollinedo, David M. Green, Roseanna Gamlen‐Greene, Richard A. Griffiths, Brian J. Halstead, Craig Hassapakis, Geoffrey Heard, Catharina Karlsson, Tom Kirschey, Blake Klocke, Tiffany A. Kosch, Sophia Kusterko Novaes, Luke Linhoff, John C. Maerz, Brittany A. Mosher, Katherine O'Donnell, Leticia M. Ochoa‐Ochoa, Deanna H. Olson, Kristiina Ovaska, J. Dale Roberts, Aimee J. Silla, Tariq Stark, Jeanne Tarrant, R. Upton, Judit Vörös, Erin MuthsSourceConservation Science and Practice. 5(9): e12988.Year2023
- Fusarium circinatum causes pine pitch canker (PPC) disease and associated symptoms such as resinous lesions, mechanical weakness, and crown dieback that may lead to mortality in Pinus and Pseudotsuga spp. There are no ameliorative techniques available for the disease, and the genetic resistance among populations to support commercial plantation deployment has not been well characterized. In this study, we characterize the genetic control of PPC disease tolerance (and/or resistance) and predict the tolerance of families in existing breeding populations: open-pollinated (OP) half-sib and...AuthorsAndrew Sims, Gary Peter, Katherine Smith, W. Patrick Cumbie, Dominic Kain, Jeremy BrawnerSourceForestsYear2023
- Drought is a major stressor of tree seedlings regarding both natural and artificial regeneration, especially in excessively drained, sandy outwash soils. While climate change is expected to cause an increase in the total annual precipitation in the Upper Midwest, USA, the timing of the precipitation is predicted to result in longer periods of drought during the growing season. Biochar, a material created through the pyrolysis of organic matter, such as wood waste, has been proposed as a soil amendment that may increase the water holding capacity of a soil. Biochar has mostly been studied...AuthorsLaura F. Reuling, Alan J. Z. Toczydlowski, Robert A. Slesak, Marcella A. Windmuller-CampioneSourceInternational Journal of Plant Biology. 14(3): 811-824.Year2023
- The combination of alkaline delignification and densification was applied to improve wood mechanical strength. Poplar wood samples were subjected to alkali delignification with varying degrees of lignin and hemicellulose removal followed by hot pressing. Dynamic mechanical performances and dynamic sorption behavior of the untreated and densified wood were then evaluated. Results showed that appropriate removal of lignin can improve the stiffness of densified wood and reduce moisture sorption and the numbers of sorption sites. Fourier transform infrared (FTIR) microscopy along with X-ray...AuthorsJiajun Wang, Yubo Chai, Junliang Liu, Junyong ZhuSourceForestsYear2023
- Accurate quality detection of hardwood logs can realize efficient utilization of wood and provide significant benefits to wood enterprises. However, due to the differences in the extraction principle of acoustic parameters and the interaction mechanism between the parameters and wood properties, the quality assessment results of hardwood logs are different to some extent. For this, a method for feature extraction of the acoustic signal and defect detection was proposed based on the improved particle swarm optimization-variational modal decomposition (IPSO-VMD). By analyzing the sparse...AuthorsFeng Xu, Yin Wu, Haifeng Lin, Yunfei Liu, Xiping Wang, Robert J. Ross, Guiyun TianKeywordsSourceNDT & E InternationalYear2023
- President Biden’s executive order, ‘Strengthening the Nation's Forests, Communities, and Local Economies,’ (EO#14072, April 22, 2022) acknowledges the interest in mature and old-growth (MOG) forests by directing U.S. Federal agencies to define and inventory these resources on United States Forest Service (USFS) and Bureau of Land Management (BLM) lands. We propose using an effective and enduring mature forest classification system that could be adaptable to social paradigms, monitoring data streams, scientific information, and global change factors. We accommodate these design aspects by...AuthorsChristopher W. W. Woodall, A.G. Kamoske, G.D. Hayward, Thomas M. Schuler, C.A. Hiemstra, M. Palmer, Andrew GrayKeywordsSourceForest Ecology and ManagementYear2023
- The prospect of using mass timber products, such as cross-laminated timber (CLT), for building material has increased in recent years because of the advantage of these products over their substitutes in terms of structural rigidity, cost efficiency, and climate benefits. However, the American National Standard developed for CLT currently applies to softwood only. With the expected increase in the market for CLT, the supply chain needs to address the projected rise in demand for hardwood as well. Promoting the production of hardwood mass timber like CLT requires studying the feasibility of...AuthorsRam K. Adhikari, Neelam C. Poudyal, Consuelo Brandeis, Prakash NepalSourceForest Products JournalYear2023
- A mass timber lateral force resisting system (LFRS) is proposed using a mass timber buckling restrained brace (TBRB) to improve the seismic resilience of mass timber buildings. To develop a resilient braced frame, it is essential to understand and quantify the behavior of the connections, including the possible failure modes and moment-rotation capacities. Cyclic and monotonic tests were conducted on six mass timber beam-column connections to study the response of a mass timber joint connected with slotted-in steel plates and mild steel dowels. The primary goal of the subassembly tests was...AuthorsEmily Williamson, Chris P. Pantelides, Hans-Erik Blomgren, Douglas R. RammerKeywordsSourceJournal of Structural EngineeringYear2023