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Displaying 18,681 - 18,690 of 64,798 Publications- The fungal pathogen Entomophaga maimaiga Humber, Shimazu, and Soper is prevalent in gypsy moth [Lymantria dispar (L.)] populations throughout North America. To understand how weather-related variables influence gypsy moth–E. maimaiga interactions in the field, we measured fungal infection rates at 12 sites in central Pennsylvania over 3 yr, concurrently measuring rainfall, soil moisture, humidity, and temperature. Fungal mortality was assessed using both field-collected larvae and laboratory-reared larvae caged on the forest floor. We found significant positive effects of moisture-related...AuthorsJames R. Reilly, Ann E. Hajek, Andrew M. Liebhold, Ruth PlymaleSourceEnvironmental Entomology. 43(3): 632-641.Year2014
- Participatory mapping of landscape values is gaining ground as a method for engaging communities and stakeholders in natural resource management. Socio-spatial mapping allows the public to identify places of economic, social, cultural, or personal importance. In addition to providing data for planning and land management, the mapping process can open dialogue about interests and concerns related to specific places. This paper presents the collaborative development and results of a values mapping exercise with a Latino community on the Olympic Peninsula in Washington State. While mapping...AuthorsKelly Biedenweg, Lee K. Cerveny, Rebecca J. McLainKeywordsSourcePracticing Anthropology. 36(1): 33-37.Year2014
- We synthesize the biology and ecology of the Cope's giant salamander. We have conducted the first compilation of known sites for the species, to aid status assessments and conservation planning. Known and suspected threats to the species are summarized. Considerations for species and species-habitat management are provided.AuthorsAlex Foster, Deanna H. OlsonKeywordsSourceInteragency Special Status/Sensitive Species Program (ISSSSP), Forest Service, Pacific Northwest Region, Bureau of Land Management. 57p.Year2014
- 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