Treesearch
Displaying 4,781 - 4,790 of 64,684 Publications- Numerous threats to urban forests are assessed for the conterminous United States, including projected changes in urban tree cover, air temperatures, precipitation, aridity, sea level rise, wildfires, and flooding, as well as threats from hurricanes, tornadoes, ice storms, and insects and diseases. All potential threats were integrated into a cumulative threat index to illustrate which areas of the United States will likely face the greatest overall threat to their urban forests. Urban forests with the greatest cumulative threat per unit area are in the eastern United States, particularly...AuthorsDavid J. Nowak, Eric J. Greenfield, Alexis EllisKeywordsSourceJournal of ForestryYear2022
- Atmospheric deposition of dissolved organic carbon (DOC) to terrestrial ecosystems is a small, but rarely studied component of the global carbon (C) cycle. Emissions of volatile organic compounds (VOC) and organic particulates are the sources of atmospheric C and deposition represents a major pathway for the removal of organic C from the atmosphere. Here, we evaluate the spatial and temporal patterns of DOC deposition using 70 data sets at least one year in length ranging from 40° south to 66° north latitude. Globally, the median DOC concentration in bulk deposition was 1.7 mg L−1. The DOC...AuthorsDaniel Liptzin, Jens Boy, John Campbell, Nicholas Clarke, Jean‐Paul Laclau, Roberto Godoy, Sherri Johnson, Klaus Kaiser, Gene E. Likens, Gunilla Pihl Karlsson, Daniel Markewitz, Michela Rogora, Stephen D. Sebestyen, James B. Shanley, Elena Vanguelova, Arne Verstraeten, Wolfgang Wilcke, Fred Worrall, William H. McDowellSourceGlobal Biogeochemical CyclesYear2022
- Mixed Quercus-Pinus stands are increasingly desired by forest managers to achieve a range of objectives, including biodiversity enhancement and resilience to global change. To create and perpetuate desired mixed Quercus-Pinus stand composition and structure, quantitative information on natural disturbance impacts on stand development and succession is necessary. Wind is the most common natural canopy disturbance in eastern North America, and impacts vary in severity and spatiotemporal scales. Intermediate-severity disturbance (ISD; events that occur along a classification gradient between...AuthorsJ. Davis Goode, Anuska Narayanan, David L. Phillips, Justin L. Hart, Scott J. Torreano, Daniel C. C. DeyKeywordsSourceForest Ecology and ManagementYear2022
Towards the Modeling and Prediction of the Yield of Oilseed Crops: A Multi-Machine Learning Approach
Crop seed yield modeling and prediction can act as a key approach in the precision agriculture industry, enabling the reliable assessment of the effectiveness of agro-traits. Here, multiple machine learning (ML) techniques are employed to predict sesame (Sesamum indicum L.) seed yields (SSY) using agro-morphological features. Various ML models were applied, coupled with the PCA (principal component analysis) method to compare them with the original ML models, in order to evaluate the prediction efficiency. The Gaussian process regression (GPR) and radial basis function neural network...AuthorsMahdieh Parsaeian, Mohammad Rahimi, Abbas Rohani, Shaneka LawsonSourceAgricultureYear2022- The classification and taxonomy of the Polyporales have undergone tremendous change and made significant progress in the last ten years. A case in point is the Cerrenaceae that was created just five years earlier. This is one of the smaller, lesserknown families with just five recognized genera and is well-defined and supported by phylogenetic analyses but difficult to characterize by morphology. Some genera and species in the Cerrenaceae display a range in basidiome habit, hymenophore configuration, and hyphal system that overlap with species from other families in the Polyporales and...AuthorsKaren K. Nakasone, Beatriz Ortiz-SantanaKeywordsSourceLilloaYear2022
- The South Fork McKenzie River (SFMR) in western Oregon, USA hosts one of the largest Stage 0 stream restoration projects implemented to date. Stage 0 refers to a multichannel planform with strong hydrologic connectivity to the adjacent floodplain and surface–subsurface connectivity. Stage 0 restoration was implemented on a 900-m-long reach of the SFMR by re-grading the channel and floodplain using 65,000 m3 of sediment to raise the channel bed. Thousands of large logs were added and the ends of some logs were buried in the sediment to provide foundations for future log jams. Our primary...AuthorsSarah Hinshaw, Ellen Wohl, Jonathan Burnett, Steve WondzellKeywordsSourceEarth Surface Processes and Landforms. 47(8): 1937-1951.Year2022
- Research suggests that maternal exposure to natural environments (i.e., green and blue spaces) promotes healthy fetal growth. However, the available evidence is heterogeneous across regions, with very few studies on the effects of blue spaces. This study evaluated associations between maternal exposure to natural environments and birth outcomes in 11 birth cohorts across nine European countries. This study, part of the LifeCycle project, was based on a total sample size of 69,683 newborns with harmonised data. For each participant, we calculated seven indicators of residential exposure to...AuthorsMaria Torres Toda, Demetris Avraam, Timothy James Cadman, Serena Fossati, Montserrat de Castro, Audrius Dedele, Geoffrey Donovan, Ahmed Elhakeem, Marisa Estarlich, Amanda Fernandes, Romy Gonçalves, Regina Grazuleviciene, Jennifer R. Harris, Margreet Harskamp-van Ginkel, Barbara Heude, Jesús Ibarluzea, Carmen Iñiguez, Vincent WV Jaddoe, Deborah Lawlor, Aitana Lertxundi, Johanna Lepeule, Rosemary McEachan, Giovenale Moirano, Johanna LT Nader, Anne-Marie Nybo Andersen, Marie Pedersen, Costanza Pizzi, Theano Roumeliotaki, Susana Santos, Jordi Sunyer, Tiffany Yang, Marina Vafeiadi, Tanja GM Vrijkotte, Mark Nieuwenhuijsen, Martine Vrijheid, Maria Foraster, Payam DadvandSourceEnvironment International. 170: 107648.Year2022
- Soy flour dispersions are used as adhesives for bonding interior wood laminates, but the high viscosity of these dispersions requires low solids in the adhesive formulations; the greater water content causes excessive steam pressure during hot press manufacturing. This limits the utility of soy adhesives in replacing urea–formaldehyde adhesives; thus, understanding the cause of high soy viscosities is important. Lack of literature on aqueous soy flour dispersion rheology led to our dynamic rheology studies of these dispersions to understand high viscosity and the effect of various additives...AuthorsCharles R. Frihart, Matthew GargulakSourcePolymers journalYear2022
Significant range extension of Streptanthus squamiformis (Brassicaceae), a Ouachita Mountain endemic
Streptanthus squamiformis Goodman (Brassicaceae) is a plant narrowly endemic to the Athens Plateau; Central Hills, Ridges, and Valleys; and Central Mountain Ranges ecoregions of the Ouachita Mountains, and previously known from five adjacent counties in western Arkansas and southeastern Oklahoma. We document a 100-km range extension of this species to Perry County in central Arkansas, its first occurrence in the Fourche Mountains Ecoregion.AuthorsVirginia McDaniel, Brent Baker, Theo Witsell, Susan L. HooksKeywordsSourceJournal of the Botanical Research Institute of TexasYear2022- Climate change projections provided by global climate models (GCM) are generally too coarse for local and regional applications. Local and regional climate change impact studies therefore use downscaled datasets. While there are studies that evaluate downscaling methodologies, there is no study comparing the downscaled datasets that are actually distributed and used in climate change impact studies, and there is no guidance for selecting a published downscaled dataset. We compare five widely used statistically downscaled climate change projection datasets that cover the conterminous USA...AuthorsJohn B. Kim, Yueyang Jiang, Linnia Hawkins, Christopher J. StillKeywordsSourceEnvironmental Research Communications. 4(12): 125005.Year2022