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Displaying 9,161 - 9,170 of 65,202 Publications- This resource update is a brief look at some of the basic metrics that describe the status of and changes to forest resources in Arkansas. Estimates presented here are for the survey year 2017 with resource changes compared against the 2016 survey year. This information is based on field data collected using the Forest Inventory and Analysis (FIA) annualized sample design, and it is updated yearly. Arkansas has about 5,700 sample plots across the State; each year, 20 percent of these plots (one panel) are visited and measured by field crews, the data compiled, and new estimates produced....AuthorsJames F. RossonKeywordsSourceResource Update FS–278. Asheville, NC: U.S. Department of Agriculture Forest Service, Southern Research Station.Year2020
- The NRCS curve number (CN) method is a widely used event-based model for estimating runoff using readily available watershed parameters and rainfall data from upland agricultural catchments. However, there is limited literature on application of the CN method in drained forest systems. This study proposes an application of the modified Sahu-Mishra-Eldho (SME) CN method developed and tested in earlier studies. In this study, the SME method was further modified by redefining the maximum potential retention to assess subsurface drainage and surface runoff, which are parts of total outflow,...AuthorsAndrzej Walega, Devendra M. AmatyaKeywordsSourceTransactions of the ASABEYear2020
- The objective was to evaluate the ability of two modified SCS-CN models to predict direct runoff (DRO) and peak discharge rate (Qp) for selected storm events in three forested watersheds in the region - one low-gradient system in South Carolina, two high-gradient upland systems in North Carolina, and a mid-gradient upland system in Arkansas. New hydrological insights for the region: The calculated peak discharge rate Qp values by all methods were unsatisfactory when using the default pond and swamp adjustment factor (Fp) value of 0.72 recommended in the SCS TR55 guideline, indicating that...AuthorsAndrzej Walega, Devendra M. Amatya, Peter V. Caldwell, Dan Marion, Sudhanshu PandaSourceJournal of Hydrology: Regional StudiesYear2020
- Population viability analyses can assess species persistence under current or simulated future conditions and guide conservation and management efforts for species of concern. We evaluated population viability of an endangered songbird, the golden‐cheeked warbler (Setophaga chrysoparia), over a 50‐year period using empirically derived population parameters collected from 2009 to 2015 on the Balcones Canyonlands Preserve (BCP), Travis County, Texas, USA. Assuming the extent and quality of habitat within the BCP does not change, the population remained stable with a population size of...AuthorsJennifer L. Reidy, Frank R. Thompson, Lisa O'DonnellKeywordsSourceWildlife Society BulletinYear2020
- Green roofs (GR) have been proposed as a possible solution for urban stressors that, integrated with other remediation and mitigation actions, can lead the way to a more sustainable society. Even when some aspects of green roof design are well established and known (i.e. depth arrangements, materials, structural components, etc.) there is a need for further development on ecological attributes. This study is a descriptive analysis of suitable plant species for their possible incorporation in green roof designs with tropical climate conditions. Green roof research has been mostly led by...AuthorsIana F. Grullón – Penkova, Jess K. Zimmerman, Grizelle GonzalezKeywordsSourceHeliyonYear2020
- Extrusion-based processes are one of the most widely used continuous polymer processing techniques because of their commercial availability, versatility, and cost-effective scal-ability. For these reasons, conventional single-screw extrusion was investigated and used for continuously processing mechanically fibrillated cellulose nanofibrils (CNFs) into wet sheets. A high shear mixing procedure was used to process highly loaded CNF pastes with up to ∼25 wt % solids, composed of ∼91 wt % CNF and ≤∼9 wt % of a processing aid like carboxymethyl cellulose (CMC), xanthan gum (XG), or anionic...AuthorsSami M. El Awad Azrak, William J. Costakis, Robert J. Moon, Gregory Schueneman, Jeffrey P. YoungbloodKeywordsSourceACS Applied Polymer Materials. 2(8): 3365-3377.Year2020
- produced utilizing feedstocks of softwood forest slash from a mill in Washington State, USA. These feedstocks were collected and processed by the team of Northwest Advanced Renewables Alliance (NARA) using technologies developed by NARA partners. This investigation found these feedstocks to be economically sustainable.AuthorsRobert Wooley, Junyong Zhu, Roland L. Gleisner, Andrew Hawkins, Paul Starkey, Johnway Gao, Tom Spink, Joe Ley, Mike Wolcott, Gevan Marrs, John SessionsSourceGen. Tech. Rep. FPL-GTR-278. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 109 p.Year2020
- White-rot (WR) fungi are pivotal decomposers of dead organic matter in forest ecosystems and typically use a large array of hydrolytic and oxidative enzymes to deconstruct lignocellulose. However, the extent of lignin and cellulose degradation may vary between species and wood type. Here, we combined comparative genomics, transcriptomics and secretome proteomics to identify conserved enzymatic signatures at the onset of wood-decaying activity within the Basidiomycota genus Pycnoporus. We observed a strong conservation in the genome structures and the repertoires of protein-coding genes...AuthorsDidier Chevret, Chris Daum, Jérôme Mariette, Christophe Klopp, Daniel Cullen, Ronald de Vries, Allen Gathman, Matthieu Hainaut, Bernard Henrissat, Kristiina Hildén, Ursula Kües, Walt Lilly, Anna Lipzen, Miia Mäkelä, Angel Martinez, Mélanie Morel-Rouhier, Emmanuelle Morin, Jasmyn Pangilinan, Arthur Ram, Han Wösten, Francisco Ruiz-Dueñas, Robert Riley, Eric Record, Igor Grigoriev, Shingo Miyauchi, Hayat Hage, Elodie Drula, Laurence Lesage-Meessen, Jean-Guy Berrin, David Navarro, Anne Favel, Delphine Chaduli, Sacha Grisel, Mireille Haon, François Piumi, Anthony Levasseur, Anne Lomascolo, Steven Ahrendt, Kerrie Barry, Kurt LaButti, Marie-Noëlle RossoKeywordsSourceDNA Research. 27(2). 14 p.Year2020
- Models for prediction of site index (SI) typically include only abiotic causal variables (e.g., soil) and lack biotic response variables (e.g., vegetation), which could exhibit greater sensitivity to important environmental factors affecting tree height growth. Our study objective was to evaluate Whittaker’s moisture condition index (MCI) (R.H. Whittaker. 1956. Ecol. Monogr. 26: 1–80) as a potential biotic variable for inclusion with conventional abiotic variables in oak (Quercus L.) SI prediction models. The MCI is the sum of relative abundances of inventoried plot tree species weighted...AuthorsHenry McNab, Tara L. KeyserSourceCanadian Journal of Forest ResearchYear2020
- This chapter highlights the state of research tools, emphasizing advancements in technologies and methodologies used to study wild pig ecology, management, and damage assessment. It focuses on research in North America, these technologies and methods are applied globally to study wild pigs. Capturing wild pigs for research is considerably different from capture for population control. Capture techniques vary widely and should be tailored to intended research or management outcomes. There are 2 basic types of gates most commonly used for trapping wild pigs, single-catch gates that remain...AuthorsJames C. Beasley, Michael J. Lavelle, David A. Keiter, Kim M. Pepin, Antoinette J. Piaggio, John Kilgo, Kurt C. VerCauterenSourceIn: Vercauteren,Kurt. C.; Beasley, James. C.; Ditchkoff, Stephen. S.; Mayer, John J.; Roloff, Gary J.; and Strickand, Bronson K. eds. Invasive wild pigs in North America: ecology, impacts, and management.Year2020