Treesearch
Displaying 10,881 - 10,890 of 65,202 Publications- Our project examines the association between percent African American and smoke pollution in the form of prescribed burn-sourced, fine particulate matter (PM2.5) in the U.S. state of Georgia for 2018. (1) Background: African Americans constitute 32.4% of Georgia’s population, making it the largest racial/ethnic minority group in the state followed by Hispanic Americans at 9.8%. African Americans, Hispanic Americans, and lower wealth groups are more likely than most middle and upper income White Americans to be exposed to environmental pollutants. This is true because racial and ethnic...AuthorsCassandra Johnson Gaither, Sadia Afrin, Fernando Garcia-Menendez, M. Talat Odman, Ran Huang, Scott Goodrick, Alan Ricardo da SilvaSourceInternational Journal of Environmental Research and Public HealthYear2019
- Managing forests for recreational benefits, such as off-highway vehicle (OHV) use, as well as other ecosystem services such as clean and abundant water, can often present challenges for land managers when one ecosystem service conflicts with another. We conducted research in the Chattahoochee-Oconee National Forest to assess whether the presence of OHV trails, and trail use, were associated with greater total suspended solids (TSS) concentration and turbidity in streams during storm events in 2015–2016. We used a paired watershed approach, with a treatment watershed containing the Locust...AuthorsChelcy F. Miniat, Patsy Clinton, Laren K. EverageKeywordsSourceTransactions of the ASABEYear2019
- An Urban Tree Canopy (UTC) assessment, which provides a measure of a community's tree canopy cover, is important for understanding the extent of a community's forest or tree resource. UTC assessments are often used for establishing and implementing municipal tree canopy goals as part of broader urban greening and sustainability initiatives. Most useful when it is combined with other information-such as the extent of impervious surfaces, socioeconomic and health data, traffic density, and heat island maps-UTC assessment contributes to broader urban greening goals, enabling communities to...AuthorsAnnie HermansenSourceFS-1121. Washington, DC.Year2019
- Relationships between forest cover and streamflow have been studied worldwide, but only a few studies have examined how gradual changes in forest structure and species composition due to logging and climate change affect watershed water yield (Q) and flow regimes. In this study, we analyzed long-term (45 years) hydrologic, climate and forest dynamics data from the subboreal Tahe watershed in northeastern China. Our purpose was to evaluate the effects of forest logging and regeneration on changes in forest biomass and species and to quantify the subsequent impact on mean annual streamflow...AuthorsZhengxiang Yu, Ge Sun, Tijiu Cai, Dennis Hallema, Liangliang DuanKeywordsSourceForestsYear2019
- Populations of the recently described black oak gallwasp, Zapatella davisae Buffington (Hymenoptera: Cynipidae), have been identified as the cause of extensive tree damage and mortality to black oaks, Quercus velutina Lamarck (Fagales: Fagaceae), in the northeastern United States. Relatively little is known, however, about the distribution, phylogenetic placement, and lifecycle of this important tree pest. Therefore, we conducted next-generation sequencing using the Ion Torrent™ PGM (ThermoFisher Scientific, Inc.) platform to develop genomic resources for the study of Z. davisae and for...AuthorsJ.C. Andersen, C.P. Camp, M.J. Davis, Nathan P. Havill, J.S. ElkintonKeywordsSourceBulletin of Entomological ResearchYear2019
- Insects and diseases cause changes in forest structure and function, species succession, and biodiversity, which may be considered negative or positive depending on management objectives (Edmonds and others 2011). An important task for forest managers, pathologists, and entomologists is recognizing and distinguishing between natural and excessive mortality, a task that relates to ecologically based or commoditybased management objectives (Teale and Castello 2011). The impacts of insects and diseases on forests vary from natural thinning to extraordinary levels of tree mortality, but...AuthorsKevin M. Potter, Jeanine L. Paschke, Frank H. H. Koch, Mark O. ZweiflerSourceIn: General Technical Report SRS-239. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station.Year2019
- The objectives of this white paper are to describe the state of the science with respect to total Nr deposition budgets in the United States and the research needed to improve these budgets from both measurement and modeling perspectives. The document is intended to serve as a plan for TDep research activities but also, more broadly, to provide program managers, natural resource managers, policy makers and scientists with an understanding of (1) the need for complete and accurate Nr deposition budgets to protect ecosystem health and human welfare, and (2) the linkages between the underlying...AuthorsJ.T. Walker, G.M. Beachley, H.M. Amos, J.S. Baron, J. Bash, R. Baumgardner, M.D. Bell, K.B. Benedict, X. Chen, D.W. Clow, A. Cole, J.G. Coughlin, K. Cruz, R.W. Daly, S.M. Decina, E.M. Elliott, Mark E. Fenn, L. Ganzeveld, K. Gebhart, S.S. Isil, B.M. Kerschner, R.S. Larson, T. Lavery, G.G. Lear, T. Macy, M.A. Mast, K. Mishoe, K.H. Morris, Pamela E. Padgett, R.V. Pouyat, M. Puchalski, H.O.T. Pye, A.W. Rea, M.F. Rhodes, C.M. Rogers, R. Saylor, R. Scheffe, B.A. Schichtel, D.B. Schwede, G.A. Sexstone, B.C. Sive, P.H. Templer, T. Thompson, D. Tong, G.A. Wetherbee, T.H. Whitlow, Z. Wu, Z. Yu, L. ZhangKeywordsSourceEPA Report EPA 601/R-19/001Year2019
- Identifying the mechanisms by which globally pervasive changes in habitat affect predators is a central, yet challenging, endeavor in applied ecology. Cryptic shifts in trophic interactions are potentially important but widely underappreciated mechanisms shaping predator population response to habitat change. Here, we assessed the extent to which variation in trophic interactions explained differences in predator populations at both local and landscape scales. We integrated stable isotope analyses, GPS tagging, and long-term territory occupancy information to characterize the trophic...AuthorsBrendan K. Hobart, Gavin M. Jones, Kevin N. Roberts, Brian P. Dotters, Sheila A. Whitmore, William J. Berigan, Martin G. Raphael, John J. Keane, R.J. Gutiérrez, M. Zachariah. PeeryKeywordsSourceBiological Conservation. 238: 108217-.Year2019
- In this study, the economic feasibility of producing ethanol from gasifcation followed by syngas fermentation via commercially available technologies was theoretically evaluated using a set of selected livestock and agricultural and forest residuals ranging from low valued feedstocks (i.e., wood, wheat straw, wheat straws blended with dewatered swine manure, and corn stover) to high valued oilseed rape meal. A preliminary cost analysis of an integrated commercial system was made for two cases, a regional scale 50 million gallon (189,271 m3) per year facility (MGY) and a co-op scale 1–2 MGY...AuthorsKyoung Ro, Mark A. Dietenberger, Judy Libra, Richard Proeschel, Hasan K. Atiyeh, Kamalakanta Sahoo, Wonkeun J. ParkKeywordsSourceEnvironments. 6(8). 15 p.Year2019
- Climate change is expected to alter precipitation patterns worldwide, which will affect streamflow in riverine ecosystems. It is vital to understand the impacts of projected flow variations, especially in tropical regions where the effects of climate change are expected to be one of the earliest to emerge. Space‐for‐time substitutions have been successful at predicting effects of climate change in terrestrial systems by using a spatial gradient to mimic the projected temporal change. However, concerns have been raised that the spatial variability in these models might not reflect the...AuthorsTherese C. Frauendorf, Richard A. MacKenzie, Ralph W. Tingley, Abby G. Frazier, Michael H. Riney, Rana W. El‐SabaawiKeywordsSourceGlobal Change Biology. 25(4): 1344-1357Year2019