Treesearch
Displaying 10,701 - 10,710 of 64,772 Publications- 1. Globally, river systems have been extensively modified through alterations in riverscapes and flow regimes, reducing their capacity to absorb geophysical and environmental changes. 2. In western North America and elsewhere, alterations in natural flow regimes and swimways through dams, levees, and floodplain development, work in concert with fire regime, forest management practices, as well as agriculture and urban development, to change recovery trajectories of river systems. 3. Hydroregime scenarios for coho salmon, Oncorhynchus kisutch (Walbaum, 1792), were investigated in Washington...AuthorsRebecca Flitcroft, Sarah A. Lewis, Ivan Arismendi, Chante Davis, Guillermo Giannico, Brooke Penaluna, Mary Santelmann, Mohammad Safeeq, Jeff SnyderKeywordsSourceAquatic Conservation: Marine and Freshwater Ecosystems. 29(7): 1083-1094.Year2019
- This is a guide for the collection of reference samples of trees to enable the identification of species and/or geographical origin of woody material. It is an update of the sampling section of the GTTN standards and guidelines (Ekué 2014) and builds further on a discussion initiated during a workshop held in Hamburg at the Thünen Institute for Wood Research in 2014. If you are looking for support on how to collect test samples, see the UNODC guide (UNODC 2016). To enable the implementation of the different laws regulating the trade in illegal wood, reference databases for various timber...AuthorsNele Schmitz, Céline Blanc-Jolivet, Markus Boner, María Teresa Cervera, Manuel Chavesta, Richard Cronn, Bernd Degen, Victor Deklerck, Carmen Diaz-Sala, Eleanor Dormontt, Marius Ekué, Edgard O. Espinoza, Peter Gasson, David Gehl, Matthias Gehre, Volker Haag, John C. Hermanson, Eurídice Honorio-Coronado, Gerald Koch, Cady Lancaster, Fredric Lens, Estephanie Patricia Liendo-Hoyos, Sandra Martínez-Jarquín, Rolando Montenegro, Kathelyn Paredes-Villanueva, Tereza Pastore, Tahiana Ramananantoandro, Vera T. Rauber-Coradin, Harisoa Ravaomanalina, Gareth Rees, Alexandre Magno Sebbenn, Niklas Tysklind, Mart Vlam, Charlie Watkinson, Michael C. WiemannKeywordsSourceGeneral sampling guide for timber tracking: How to collect reference samples for timber identification. Global Timber Tracking Network, GTTN Secretariat, European Forest Institute and Thuenen Institute. 43p.Year2019
- There is an urgent need for next-generation smoke research and forecasting (SRF) systems to meet the challenges of the growing air quality, health and safety concerns associated with wildland fire emissions. This review paper presents simulations and experiments of hypothetical prescribed burns with a suite of selected fire behaviour and smoke models and identifies major issues for model improvement and the most critical observational needs. The results are used to understand the new and improved capability required for the next-generation SRF systems and to support the design of the Fire...AuthorsAdam Kochanski, Kirk R. Baker, William E. Mell, Rodman Linn, Ronan Paugam, Yongqiang Liu, Jan Mandel, Aime Fournier, Mary Ann Jenkins, Scott Goodrick, Gary Achtemeier, Fengjun Zhao, Roger D. Ottmar, Nancy H. F. French, Narasimhan Larkin, Timothy Brown, Andrew T. Hudak, Matthew B. Dickinson, Brian Potter, Craig Clements, Shawn P. Urbanski, Susan Prichard, Adam Watts, Derek McNamaraKeywordsSourceInternational Journal of Wildland FireYear2019
- Major atmospheric circulation patterns for wildfires have been identified in regions with boreal, Mediterranean, and semiarid climates. This study investigates such patterns in the monsoon regions of China, where the climate is controlled by multiple atmospheric systems and wildfires have large spatial variability. We identified three patterns. The first pattern was characterized by a high‐pressure ridge in northeast China and contributed to wildfires by creating warmer and drier conditions. The second, meridional pattern contributed to wildfires in north, central, and south China by...AuthorsFengjun Zhao, Yongqiang LiuSourceGeophysical Research LettersYear2019
- A new species of scorpionfly, similar to Panorpa helena and Panorpa insolens, but lacking 2–4 long, stout, black setae on the male basistyles apices and possessing long barbs on the apices of the male ventral parameres, is described from the Bluegrass Region of Kentucky.AuthorsWesley Bicha, Nathan SchiffSourceEntomological NewsYear2019
- In road construction projects across the United States, erosion control methods (e.g., erosion control blankets [ECBs]), are mandated to stimulate seedbed regeneration and prevent soil loss. Previous reports have suggested that snakes are vulnerable to entanglement in ECBs. We conducted a literature review, field surveys, and an entanglement experiment to examine what factors increase a snake’s risk of ECB entanglement. Our literature review produced reports of 175 reptiles entangled in mesh products, 89.1% of which were snakes, with 43.6% of snake entanglements occurring in erosion...AuthorsSarah E. Ebert, Kasey L. Jobe, Christopher M. Schalk, Daniel Saenz, Cory K. Adams, Christopher E. ComerKeywordsSourceWildlife Society BulletinYear2019
- A 20-year experiment was reported on the effects of climate variability and management in California's ponderosa pine plantations. Pine trees were grown in three different climatic and edaphic zones treated with herbicide to reduce competition from understory plants and/or fertilizer to stimulate growth. We found that management increased tree growth and, in most but not all cases, the combination of understory suppression and fertilization stimulated productivity beyond the expected growth potential of each site. In addition, wet sites have the most productive forests overall, but they...AuthorsG. C. Liles, T. M. Maxwell, L. C. R. Silva, Jianwei Zhang, W. R. HorwathKeywordsSourceJournal of Geophysical Research: Biogeosciences. 124: 2321-2334Year2019
- Potential risk for disruption to supply of raw materials for bio-based industrial sites from natural disasters has received little attention in site evaluations even though these risks may be significant. Biomass supply in the form of roundwood, forest and agricultural residues, or dedicated short rotation plantations are especially subject to disruptions from meteorological disturbances such as floods, wind and ice storms. The objective of this study was to account for risk from natural disasters in assessing the economic supply of biomass for the Eastern United States in a geospatial...AuthorsJames H. H. Perdue, John A. Stanturf, Timothy M. Young, Xia HuangSourceScandinavian Journal of Forest ResearchYear2019
- Over the past two decades, the United States government conducted detailed analyses of the potential of a biobased national energy strategy that produced four unified studies, namely the 2005–2016 US Billion-Ton Study and updates. With each effort, better perspective was gained on the biophysical potential of biomass and the economic availability of these resources on a national scale. It was also apparent that many questions remained, including crop yields, logistical operations, and systems integration across production and harvest. These reports accentuated the need for improving...AuthorsJohn A. Stanturf, James H. H. Perdue, Timothy M. Young, Xia Huang, Zhimei Guo, Derek Dougherty, Michael PigottKeywordsSourceEnergy, Sustainability and SocietyYear2019
- Estimates of growth or change in a forest population parameter for a specific length of time, such as cubic meters of wood per hectare per year, are often made from sample observation intervals of di erent lengths of time. For instance, a basic building block of growth estimators in forest inventory systems is often the annual mean of the first di erences of all observations for a particular year, regardless of observation interval length. The aggregate di erences between successive observations on re-measured forest sample plots can be viewed as a linear combination, while forest growth...AuthorsFrancis RoeschSourceForestsYear2019