Now showing items 1-20 of 8631

    • Inclusive Pedagogy Resources & Activities 

      Drape, Tiffany (2020-07-07)
    • River network saturation concept: factors influencing the balance of biogeochemical supply and demand of river networks 

      Wollheim, W. M.; Bernal, S.; Burns, D. A.; Czuba, J. A.; Driscoll, C. T.; Hansen, A. T.; Hensley, R. T.; Hosen, J. D.; Inamdar, S.; Kaushal, S. S.; Koenig, L. E.; Lu, Y. H.; Marzadri, A.; Raymond, P. A.; Scott, D.; Stewart, R. J.; Vidon, P. G.; Wohl, E. (2018-12)
      River networks modify material transfer from land to ocean. Understanding the factors regulating this function for different gaseous, dissolved, and particulate constituents is critical to quantify the local and global ...
    • Science questions and knowledge gaps to study microbial transport and survival in Asian and African dust plumes reaching North America 

      Schuerger, Andrew C.; Smith, David J.; Griffin, Dale W.; Jaffe, Daniel A.; Wawrik, Boris; Burrows, Susannah M.; Christner, Brent C.; Gonzalez-Martin, Cristina; Lipp, Erin K.; Schmale, David G., III; Yu, Hongbin (2018-12)
      The Sahara in North Africa and the Gobi and Taklamakan deserts in Asia are the primary sources of mobilized dust in the atmosphere, with regional or global airborne transport estimated at 2 to 5 billion tonnes per year. ...
    • Estimating dominant runoff modes across the conterminous United States 

      Buchanan, Brian; Auerbach, Daniel A.; Knighton, James; Evensen, Darrick; Fuka, Daniel R.; Easton, Zachary; Wieczorek, Michael; Archibald, Josephine A.; McWilliams, Brandon; Walter, Todd (2018-12-30)
      Effective natural resource planning depends on understanding the prevalence of runoff generating processes. Within a specific area of interest, this demands reproducible, straightforward information that can complement ...
    • Conserved Small Nucleotidic Elements at the Origin of Concerted piRNA Biogenesis from Genes and lncRNAs 

      Jensen, Silke; Brasset, Emilie; Parey, Elise; Roest Crollius, Hugues; Sharakhov, Igor V.; Vaury, Chantal (MDPI, 2020-06-18)
      PIWI-interacting RNAs (piRNAs) target transcripts by sequence complementarity serving as guides for RNA slicing in animal germ cells. The piRNA pathway is increasingly recognized as critical for essential cellular functions ...
    • Inositol Pyrophosphate Pathways and Mechanisms: What Can We Learn from Plants? 

      Cridland, Caitlin; Gillaspy, Glenda (MDPI, 2020-06-17)
      The ability of an organism to maintain homeostasis in changing conditions is crucial for growth and survival. Eukaryotes have developed complex signaling pathways to adapt to a readily changing environment, including the ...
    • Mapping and Estimating Weeds in Cotton Using Unmanned Aerial Systems-Borne Imagery 

      Sapkota, Bishwa; Singh, Vijay; Cope, Dale; Valasek, John; Bagavathiannan, Muthukumar (MDPI, 2020-06-16)
      In recent years, Unmanned Aerial Systems (UAS) have emerged as an innovative technology to provide spatio-temporal information about weed species in crop fields. Such information is a critical input for any site-specific ...
    • Multi-Bale Handling Unit for Efficient Logistics 

      Grisso, Robert “Bobby”; Cundiff, John; Comer, Kevin (MDPI, 2020-06-16)
      This paper presents a design for a feedstock logistics system to supply a bioenergy plant located in the Southeast USA, specifically Piedmont, a physiographic region covering part of five states (VA, NC, SC, GA, and AL). ...
    • Haplotype Purging after Relaxation of Selection in Lines of Chickens That Had Undergone Long-Term Selection for High and Low Body Weight 

      Yang, Yunzhou; Zan, Yanjun; Honaker, Christa F.; Siegel, Paul B.; Carlborg, Örjan (MDPI, 2020-06-08)
      Bi-directional selection for increased and decreased 56-day body weights (BW56) has been applied to two lines of White Plymouth Rock chickens—the Virginia high (HWS) and low (LWS) body weight lines. Correlated responses ...
    • Sylvatic Mosquito Diversity in Kenya—Considering Enzootic Ecology of Arboviruses in an Era of Deforestation 

      Eastwood, Gillian; Sang, Rosemary C.; Lutomiah, Joel; Tunge, Philip; Weaver, Scott C. (MDPI, 2020-06-03)
      As new and re-emerging vector-borne diseases are occurring across the world, East Africa represents an interesting location, being the origin of several arboviruses with a history of urbanization and global spread. Rapid ...
    • Salt Stress Signals on Demand: Cellular Events in the Right Context 

      Ismail, Ahmed; El-Sharkawy, Islam; Sherif, Sherif (MDPI, 2020-05-30)
      Plant stress is a real dilemma; it puzzles plant biologists and is a global problem that negatively affects people’s daily lives. Of particular interest is salinity, because it represents one of the major water-related ...
    • Seasonal variability of organic matter composition in an Alaskan glacier outflow: insights into glacier carbon sources 

      Spencer, Robert G.M.; Vermilyea, Andrew; Fellman, Jason; Raymond, Peter; Stubbins, Aaron; Scott, Durelle T.; Hood, Eran (IOP Publishing, 2014-05-08)
      Glacier ecosystems are a significant source of bioavailable, yet ancient dissolved organic carbon (DOC). Characterizing DOC in Mendenhall Glacier outflow (southeast Alaska) we document a seasonal persistence to the ...
    • How Hydrologic Connectivity Regulates Water Quality in River Corridors 

      Harvey, Jud; Gomez-Velez, Jesus; Schmadel, Noah; Scott, Durelle T.; Boyer, Elizabeth; Alexander, Richard; Eng, Ken; Golden, Heather; Kettner, Albert; Konrad, Chris; Moore, Richard; Pizzuto, Jim; Schwarz, Greg; Soulsby, Chris; Choi, Jay (2019-04)
      Downstream flow in rivers is repeatedly delayed by hydrologic exchange with off-channel storage zones where biogeochemical processing occurs. We present a dimensionless metric that quantifies river connectivity as the ...
    • Changes in belowground biodiversity during ecosystem development 

      Delgado-Baquerizo, Manuel; Bardgett, Richard D.; Vitousek, Peter M.; Maestre, Fernando T.; Williams, Mark A.; Eldridge, David J.; Lambers, Hans; Neuhauser, Sigrid; Gallardo, Antonio; Garcia-Velazquez, Laura; Sala, Osvaldo E.; Abades, Sebastian R.; Alfaro, Fernando D.; Berhe, Asmeret A.; Bowker, Matthew A.; Currier, Courtney M.; Cutler, Nick A.; Hart, Stephen C.; Hayes, Patrick E.; Hseu, Zeng-Yei; Kirchmair, Martin; Pena-Ramirez, Victor M.; Perez, Cecilia A.; Reed, Sasha C.; Santos, Fernanda; Siebe, Christina; Sullivan, Benjamin W.; Weber-Grullon, Luis; Fierer, Noah (2019-04-02)
      Belowground organisms play critical roles in maintaining multiple ecosystem processes, including plant productivity, decomposition, and nutrient cycling. Despite their importance, however, we have a limited understanding ...
    • Small Ponds in Headwater Catchments Are a Dominant Influence on Regional Nutrient and Sediment Budgets 

      Schmadel, Noah M.; Harvey, Judson W.; Schwarz, Gregory E.; Alexander, Richard B.; Gomez-Velez, Jesus D.; Scott, Durelle T.; Ator, Scott W. (2019-08-28)
      Small ponds-farm ponds, detention ponds, or impoundments below 0.01 km(2)-serve important human needs throughout most large river basins. Yet the role of small ponds in regional nutrient and sediment budgets is essentially ...
    • Importance of Sanitation and Allergen Preventive Controls Validation 

      Nantob-Bikatui, N'Lemahoule (Virginia Tech, 2020-05-04)
      The Preventive Controls for Human Food (PC) Rule, published in 2015, expanded on the Hazard Analysis Critical Control Point (HACCP) approach by including sanitation, allergen, and supply chain preventive controls for food ...
    • The spillover effects of seed producer groups on non-member farmers in mid-hill communities of Nepal 

      Vaiknoras, Kate; Larochelle, Catherine; Alwang, Jeffrey R. (International Fund for Agricultural Development, 2020-06)
      Rice farmers in the mid-hills region of Nepal are vulnerable to drought, which can drastically reduce yields. Stress-tolerant rice varieties (STRVs) can mitigate this vulnerability, as can having a high seed replacement ...
    • Characterization of the transcriptional divergence between the subspecies of cultivated rice (Oryza sativa) 

      Campbell, Malachy T.; Du, Qian; Liu, Kan; Sharma, Sandeep; Zhang, Chi; Walia, Harkamal (2020-06-08)
      Abstract Background Cultivated rice consists of two subspecies, Indica and Japonica, that exhibit well-characterized differences at the morphological and genetic levels. However, the differences between these subspecies ...
    • Species traits predict stream-fish invaders in an Appalachian (USA) river basin 

      Buckwalter, Joseph D.; Frimpong, Emmanuel A.; Angermeier, Paul L.; Barney, Jacob (2020-03)
      We compared the influence of biological traits (morphology, physiology, reproduction, and life history), ecological traits (geographic distribution, habitat associations, food habits), and introduction attributes (propagule ...
    • Winter Hardiness and Spring Regrowth of Four Varieties of Stevia rebaudiana (Bertoni) in Eastern North Carolina 

      Coggin, Carlette; Welbaum, Gregory E.; Balota, Maria; Thomason, Wade (Virginia Tech, 2020-06-04)
      Stevia (Stevia rebaudiana) is attracting attention in the United States in response to consumer demand for healthier low-calorie sweeteners. Farmers are looking at stevia as a valuable alternative crop to add to their ...