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Displaying 19,091 - 19,100 of 65,202 Publications- We provide a comprehensive synthesis of the biology and ecology of the Van Dyke's Salamander, review known and suspected threats, and outline alternative management considerations. This species is agency sensitive and is listed as a Survey and Manage species under the Northwest Forest Plan. This document will aid Forest Service Region 6 forest managers and biologists in planning for projects within the species range in Washington, especially on National Forests in the Olympic Peninsula and Cascade Range.AuthorsDeanna H. Olson, Charlie CrisafulliKeywordsSourceOnline only: Interagency Special Status/Sensitive Species Program (ISSSSP)Year2014
- Pecan (Carya illinoiensis) and white oak (Quercus alba) produce multiple products and wildlife values, but their phenological responses to N fertilization have not been well characterized. We compared tree growth at planting and for six consecutive growing seasons during establishment (2003–2008, Test 1), and determined if phenology of budburst, leaf area index (LAI), quantum yield of photosystem II (Fv/Fm), radial growth, and total chlorophyll concentration (a, b) responded to poultry litter fertilization supplying 0, 50, and 100 kg ha-1N(2010–2012, Test 2) in a mixedspecies orchard on an...AuthorsD. M. Burner, D. K. Brauer, J. L. Snider, Connie Harrington, P. A. MooreKeywordsSourceAgroforestry Systems. 88(1): 141-155.Year2014
- Adelges tsugae (Hemlock Woolly Adelgid; HWA) is a non-native forest insect that causes defoliation and mortality of hemlock in the eastern US. We quantified the extent to which people are potentially affected by the spread of HWA infestation where they live and where they recreate. We also considered how these impacts might change through time using data from 2007, 2009, and 2011. The study area included hemlock stands in a 7500-km2 region of central Connecticut and central Massachusetts. We used sample-plot data on live basal area and vigor of hemlock stands to interpolate hemlock health...AuthorsXiaoshu Li, Evan L. Preisser, Kevin J. Boyle, Tom Holmes, Andrew M. Liebhold, David OrwigSourceSoutheastern Naturalist. 13(6): 130-146.Year2014
- National Forest Inventories (NFIs) provide estimates of forest parameters for national and regional scales. Many key variables of interest, such as biomass and timber volume, cannot be measured directly in the field. Instead, models are used to predict those variables from measurements of other field variables. Therefore, the uncertainty or variability of NFI estimates results not only from selecting a sample of the population but also from uncertainties in the models used to predict the variables of interest. The aim of this study was to quantify the model-related variability of Norway...AuthorsJohannes Breidenbach, Clara Antón-Fernández, Hans Petersson, Ronald E. McRoberts, Rasmus AstrupKeywordsSourceForest ScienceYear2014
- A globally integrated carbon observation and analysis system is needed to improve the fundamental understanding of the global carbon cycle, to improve our ability to project future changes, and to verify the effectiveness of policies aiming to reduce greenhouse gas emissions and increase carbon sequestration. Building an integrated carbon observation system requires transformational advances from the existing sparse, exploratory framework towards a dense, robust, and sustained system in all components: anthropogenic emissions, the atmosphere, the ocean, and the terrestrial biosphere. The...AuthorsP. Ciais, A. J. Dolman, A. Bombelli, R. Duren, A. Peregon, P. J. Rayner, C. Miller, N. Gobron, G. Kinderman, G. Marland, N. Gruber, F. Chevallier, R. J. Andres, G. Balsamo, L. Bopp, F.-M. Bréon, G. Broquet, R. Dargaville, T. J. Battin, A. Borges, H. Bovensmann, M. Buchwitz, J. Butler, J. G. Canadell, R. B. Cook, R. DeFries, R. Engelen, K. R. Gurney, C. Heinze, M. Heimann, A. Held, M. Henry, B. Law, S. Luyssaert, J. Miller, T. Moriyama, C. Moulin, R. B. Myneni, C. Nussli, M. Obersteiner, D. Ojima, Yude Pan, J.-D. Paris, S. L. Piao, B. Poulter, S. Plummer, S. Quegan, P. Raymond, M. Reichstein, L. Rivier, C. Sabine, D. Schimel, O. Tarasova, R. Valentini, R. Wang, G. van der Werf, D. Wickland, M. Williams, C. ZehnerSourceBiogeosciencesYear2014
- As public land management agencies pursue region-specific resource management plans, with meaningful consideration of public attitudes and values, there is a need to characterize the complex mix of environmental attitudes in a diverse population. The contribution of this investigation is to make use of a unique household, mail/ internet survey data set collected in 2007 in the Southwestern United States (Region 3 of the U.S. Forest Service). With over 5,800 survey responses to a set of 25 Public Land Value statements, canonical correlation analysis is able to identify 7 statistically...AuthorsAlejandro J. Prera, Kristine M. Grimsrud, Jennifer A. Thacher, Dan W. McCollum, Robert P. BerrensSourceEnvironmental Management. 54: 756-767.Year2014
- The Mississippi Alluvial Valley once had extensive bottomland hardwood forests, but less than 25% of the original area remains. Impounded bottomland hardwood forests, or greentree reservoirs, and naturally flooded forests are important sources of invertebrate or other prey for waterfowl, but no previous studies of invertebrate abundance and biomass have been at the scale of the Mississippi Alluvial Valley. Additionally, the Lower Mississippi Valley Joint Venture of the North American Waterfowl Management Plan requires precise, contemporary estimates of invertebrate biomass in hardwood...AuthorsJustyn R. Foth, Jacob N. Straub, Richard M. Kaminski, J. Brian Davis, Ted LeiningerKeywordsSourceJournal of Fish and Wildlife ManagementYear2014
- Although white-tailed deer (Odocoileus virginianus Zimmermann) are generalist herbivores, they can have significant effects on species composition and abundance of forest trees, especially when deer densities are high and most plant species are heavily browsed but a few are selectively avoided as browse. We evaluated effects of selective deer browsing on tree species abundance in an old-growth mesic/wet-mesic forest in central Illinois by repeated sampling of permanent study plots in 2003 and 2008 and relating changes in stem density between the two samples to the intensity of deer...AuthorsMitchell Slater, Roger C. AndersonSourceNatural Areas JournalYear2014
- Outdoor recreation contributes to public health, supports hundreds of thousands of jobs, and provides billions of dollars annually to rural economies. Visitors to federal lands alone spent $51 billion in 2012 in nearby communities during their trips to recreate on public lands and waters (Forest Service National Center for Natural Resources Economic Research 2014). Outdoor recreation also promotes environmental stewardship and strengthens connections to public lands. However, access to and preferences for outdoor recreation are changing along with climate, natural resource conditions,...AuthorsMiranda H. Mockrin, Michael Bowker, Katherine Smith, Cindi WestSourceIn: Transactions of the Seventy-Ninth North American Wildlife & Natural Resources Conference. Denver, CO, March 10-14, 2014.Year2014
- Efforts to suppress an invasive weed are often undertaken with the goal of facilitating the recovery of a diverse native plant community. In some cases, however, reduction in the abundance of the target weed results in an increase in other exotic weeds. Mile-a-minute weed (Persicaria perfoliata (L.) H. Gross (Polygonaceae)) is an annual vine from Asia that has invaded the eastern United States, where it can form dense monocultures. The host-specific Asian weevil Rhinoncomimus latipes Korotyaev (Coleoptera: Curculionidae) was first released in the United States in 2004 as part of a classical...AuthorsEllen C. Lake, Judith Hough-Goldstein, Vince D'AmicoKeywordsSourceRestoration EcologyYear2014