Now showing items 925-944 of 1300

    • A Qualitative Analysis of The Southern Pine Beetle's Wildlife Impact 

      Maine, John D.; Leuschner, William A.; Tipton, Alan R. (Virginia Tech. Division of Forestry and Wildlife Resources, 1980)
      Wildlife's social value has long been known. Early attempts to place dollar values on wildlife were crude (Stains and Barkalow, 1951; Collins, 1959) and often incomprehensible. For example, Collins found that each deer ...
    • Quantifying climate sensitivity and climate-driven change in North American amphibian communities 

      Miller, David A. W.; Grant, Evan H. Campbell; Muths, Erin; Amburgey, Staci M.; Adams, Michael J.; Joseph, Maxwell B.; Waddle, J. Hardin; Johnson, Pieter T. J.; Ryan, Maureen E.; Schmidt, Benedikt R.; Calhoun, Daniel L.; Davis, Courtney L.; Fisher, Robert N.; Green, David M.; Hossack, Blake R.; Rittenhouse, Tracy A. G.; Walls, Susan C.; Bailey, Larissa L.; Cruickshank, Sam S.; Fellers, Gary M.; Gorman, Thomas A.; Haas, Carola A.; Hughson, Ward; Pilliod, David S.; Price, Steven J.; Ray, Andrew M.; Sadinski, Walt; Saenz, Daniel; Barichivich, William J.; Brand, Adrianne; Brehme, Cheryl S.; Dagit, Rosi; Delaney, Katy S.; Glorioso, Brad M.; Kats, Lee B.; Kleeman, Patrick M.; Pearl, Christopher A.; Rochester, Carlton J.; Riley, Seth P. D.; Roth, Mark; Sigafus, Brent H. (2018-09-25)
      Changing climate will impact species' ranges only when environmental variability directly impacts the demography of local populations. However, measurement of demographic responses to climate change has largely been limited ...
    • Quantitative evidence for the effects of multiple drivers on continental-scale amphibian declines 

      Grant, Evan H. Campbell; Miller, David A. W.; Schmidt, Benedikt R.; Adams, Michael J.; Amburgey, Staci M.; Chambert, Thierry; Cruickshank, Sam S.; Fisher, Robert N.; Green, David M.; Hossack, Blake R.; Johnson, Pieter T. J.; Joseph, Maxwell B.; Rittenhouse, Tracy A. G.; Ryan, Maureen E.; Waddle, J. Hardin; Walls, Susan C.; Bailey, Larissa L.; Fellers, Gary M.; Gorman, Thomas A.; Ray, Andrew M.; Pilliod, David S.; Price, Steven J.; Saenz, Daniel; Sadinski, Walt; Muths, Erin (Springer Nature, 2016-05-23)
      Since amphibian declines were first proposed as a global phenomenon over a quarter century ago, the conservation community has made little progress in halting or reversing these trends. The early search for a "smoking gun" ...
    • Quantitative Genetic Background of the Host Influences Gut Microbiomes in Chickens 

      Zhao, L. L.; Wang, G.; Siegel, P.; He, C.; Wang, H. Z.; Zhao, W. J.; Zhai, Z. X.; Tian, F. W.; Zhao, J. X.; Zhang, H.; Sun, Z. K.; Chen, W.; Zhang, Y.; Meng, H. (Nature Publishing Group, 2013-01)
      Host genotype and gender are among the factors that influence the composition of gut microbiota. We studied the population structure of gut microbiota in two lines of chickens maintained under the same husbandry and dietary ...
    • Range-wide Assessment of Habitat Suitability for Roanoke Logperch (Percina rex) 

      Anita M. Lahey; Paul L. Angermeier (Virginia Center for Transportation Innovation and Research, 2007-01)
      The Roanoke logperch (Percina rex) is a federally endangered darter endemic to Virginia. Knowledge of its distribution and habitat requirements is limited. Before this study, it was known to occur in the Smith, Pigg, Roanoke ...
    • A Range-Wide Experiment to Investigate Nutrient and Soil Moisture Interactions in Loblolly Pine Plantations 

      Will, Rodney E.; Fox, Thomas R.; Akers, Madison; Domec, Jean-Christophe; González-Benecke, Carlos; Jokela, Eric J.; Kane, Michael; Laviner, Marshall A.; Lokuta, Geoffrey; Markewitz, Daniel; McGuire, Mary Anne; Meek, Cassandra; Noormets, Asko; Samuelson, Lisa; Seiler, John R.; Strahm, Brian; Teskey, Robert; Vogel, Jason; Ward, Eric; West, Jason; Wilson, Duncan; Martin, Timothy A. (MDPI, 2015-06-03)
      The future climate of the southeastern USA is predicted to be warmer, drier and more variable in rainfall, which may increase drought frequency and intensity. Loblolly pine (Pinus taeda) is the most important ...
    • A Range-Wide Meta-Analysis of Wild Turkey Nesting Phenology and Spring Season Opening Dates 

      Whitaker, Darroch M.; Pack, James C.; Norman, Gary W.; Stauffer, Dean F.; Klopfer, Scott D. (Michigan Department of Natural Resources, 2005)
      Timing of nesting is an important consideration when setting opening dates for spring male-only wild turkey (Meleagris gallopavo) hunts. We conducted a meta-analysis in which we used mean dates of incubation initiation ...
    • Rapid assays for microbial degradation of 2-chlorophenol 

      Pal, H. S.; Murphy, T.; Carter, A. C.; Drew, S. W. (Virginia Water Resources Research Center, Virginia Polytechnic Institute and State University, 1980)
    • Rapid Life-History Diversification of an Introduced Fish Species across a Localized Thermal Gradient 

      Zhu, Fengyue; Rypel, Andrew L.; Murphy, Brian R.; Li, Zhongjie; Zhang, Tanglin; Yuan, Jing; Guo, Zhiqiang; Tang, Jianfeng; Liu, Jiashou (PLOS, 2014-02-04)
      Climatic variations are known to engender life-history diversification of species and populations at large spatial scales. However, the extent to which microgeographic variations in climate (e.g., those occurring within a ...
    • Rapid Removal of Zinc(II) from Aqueous Solutions Using a Mesoporous Activated Carbon Prepared from Agricultural Waste 

      Zhang, Xiaotao; Hao, Yinan; Wang, Ximing; Chen, Zhangjing (MDPI, 2017-08-28)
      A low-cost activated carbon (XSBLAC) prepared from Xanthoceras Sorbifolia Bunge hull via chemical activation was investigated to determine its adsorption and desorption properties for zinc(II) ...
    • Recent and Historical Environmental Change in Lake Drummond, Within the Great Dismal Swamp 

      Burdige, David Jay, 1956-; Slate, Jennifer; Hicks, Jeremy; Frazier, Melissa; Donalty, Sean (Virginia Water Resources Research Center, 2004)
    • Recent Remote Sensing Innovations and Future Direction 

      Thomas, Valerie A.; Wynne, Randolph H.; Liknes, GC; Derwin, JM; Coulston, JW; Brooks, EB; Finco, MV; Saxena, R; Watson, Layne T.; Moisen, GG; Ruefenacht, B; Megown, K (2017-10-25)
    • Recommendations for improving water resources management in Virginia 

      Walker, William R.; Cox, William Edward, 1944- (Virginia Water Resources Research Center, Virginia Polytechnic Institute and State University, 1976)
    • Recovery and reuse of coagulants from treatment of water and wastewater 

      King, Paul H.; Chen, Ben Hsueh Hai, 1946-; Weeks, R. Kenneth (Water Resources Research Center, Virginia Polytechnic Institute and State University, 1975)
      The focus of water quality research in the decade ahead will emphasize the development of processes which will enable reclamation and reuse as opposed to wastewater treatment and disposal to a nearby water course. In th ...
    • Reducing Reforestation Costs in Lebanon: Adaptive Field Trials 

      Haroutunian, Garabet (Garo); Chojnacky, David C.; El Riachy, Richard; Chojnacky, Cindy C. (MDPI, 2017-05-17)
      Lebanon’s Ministry of Environment initiated a project in 2009 to determine low-cost reforestation techniques for stone pine (Pinus pinea) and Lebanon cedar (Cedrus libani) for large-scale land rehabilitation ...
    • Reducing the Conflict between Trees and Overhead Utility Lines through Public Awareness and Education 

      Matiuk, Jonathan D. (Virginia Tech, 2016-09-08)
      Trees in the built environment often have the potential to grow large enough to touch overhead utility lines, creating a dangerous interaction between the urban forest and utility infrastructure. The purpose of this project ...
    • Regulation of shoot-system development in Populus 

      Brunner, Amy M.; Sheng, Xiaoyan; Edwards, Joesph; Fujino, Takeshi; Wang, Chieh-Ting; DiFazio, Stephen (2011-09-13)
    • Regulatory permits and requirements for commercial aquaculture in Virginia 

      Helfrich, Louis A. (Louis Anthony), 1942-; Libey, George S., 1942-; Weigmann, Diana L.; Smith, Stephen A.; Buck T. R. (Virginia Water Resources Research Center, Virginia Polytechnic Institute and State University, 1993-08)
    • Rehabilitation of streams receiving acid mine drainage 

      Herricks, Edwin E.; Cairns, John, 1923- (Water Resources Research Center, Virginia Polytechnic Institute and State University, 1974)
    • Remaining populations of an upland stream fish persist in refugia defined by habitat features at multiple scales 

      Dunn, C.G.; Angermeier, P.L. (Blackwell Publishing Ltd, 2018-12-17)
      Aim: Conserving stream biota could require strategies that preserve habitats conveying resistance to ecological impacts of changing land use and climate. Retrospective analyses of species’ responses to anthropogenic ...