Fossilized diatoms of siliceous hydrothermal deposits in Yellowstone National Park, USA
Sabrina Brown, Sherilyn Fritz, Lisa Ann Morgan Morzel, Wayne (Pat) Shanks
2019, Diatom Research (34) 193-204
The study of eukaryotic extremophiles is relatively novel, and, therefore, documentation of the structure and function of micro-organisms in continental hydrothermal systems globally is limited. In this study, we investigate fossil diatoms in siliceous hydrothermal deposits of the Upper Geyser and Yellowstone Lake hydrothermal basins in Yellowstone...
Phosphorus runoff risk assessment in karstic regions of the U.S.
Andrew N. Sharpley, Phillip D. Hays, Michael B. Daniels, Karl W. VanDevender
2019, Agricultural & Environmental Letters (5)
The Phosphorus (P) Index risk assessment tool has been widely adopted across the U.S. to identify and rank site vulnerability to P runoff as part of the Natural Resources Conservation Service (NRCS) nutrient management planning (NMP) process. However, limited success has been achieved in addressing the risk of P loss...
User's guide for the national hydrography dataset plus (NHDPlus) high resolution
Richard B. Moore, Lucinda D. McKay, Alan H. Rea, Timothy R. Bondelid, Curtis V. Price, Thomas G. Dewald, Craig M. Johnston
2019, Open-File Report 2019-1096
The National Hydrography Dataset Plus High Resolution (NHDPlus HR) is a scalable geospatial hydrography framework built from the High Resolution (1:24,000-scale or better) National Hydrography Dataset (NHD), nationally complete Watershed Boundary Dataset (WBD), and ⅓-arc-second (10-meter ground spacing) 3D Elevation Program (3DEP) digital elevation model (DEM) data. The NHDPlus HR...
Rating fire danger from the ground up
Matthew Levi, Erik S. Krueger, Grant J. Snitker, Tyson Ochsner, Miguel L. Villarreal, Emile H. Elias, Dannele E. Peck
2019, Eos, Earth and Space Science News
Soil moisture information could improve assessments of wildfire probabilities and fuel conditions, resulting in better fire danger ratings....
Determination of study reporting limits for pesticide constituent data for the California Groundwater Ambient Monitoring and Assessment Program Priority Basin Project, 2004–2018—Part 1: National Water Quality Schedules 2003, 2032, or 2033, and 2060
Miranda S. Fram, Sylvia V. Stork
2019, Scientific Investigations Report 2019-5107
The California Groundwater Ambient Monitoring and Assessment Program Priority Basin Project (GAMA-PBP) is a long-term cooperative project designed to assess the quality of groundwater resources used for public and domestic drinking water supplies in the State of California, to monitor and evaluate changes to that quality, to investigate the human...
The effects of management practices on grassland birds—Thick-billed Longspur (Rhynchophanes mccownii)
Jill A. Shaffer, Lawrence D. Igl, Douglas H. Johnson, Marriah L. Sondreal, Christopher M. Goldade, Paul A. Rabie, Travis L. Wooten, Betty R. Euliss
2019, Professional Paper 1842-Y
The key to Thick-billed Longspur (Rhynchophanes mccownii) management is providing short, sparsely vegetated native grasslands of adequate size. Mixed-grass prairies can be made suitable for breeding Thick-billed Longspurs by implementing moderate-to-heavy or season-long grazing. Thick-billed Longspurs have been reported to use habitats with 5–42 centimeters (cm) average...
Inactivation of viable surrogates for the select agents virulent Newcastle disease virus and highly pathogenic avian influenza virus using either commercial lysis buffer or heat
Katrina E. Alger, S. Ip, Jeffrey S. Hall, Sean Nashold, Katherine Richgels, Carrie Alison Smith
2019, Applied Biosafety (24) 189-199
Introduction:Federal Select Agent Program regulations require laboratories to document a validated procedure for inactivating select agents prior to movement outside registered space. Avian influenza viruses and virulent Newcastle disease virus (vNDV) are cultured in chicken amnio-allantoic fluid (AAF), but the efficacy of commercial lysis buffers to...
Migrating bison engineer the green wave
Chris Geremia, Jerod Merkle, Daniel R. Eacker, Rick L. Wallen, P. J. White, Mark Hebblewhite, Matthew J. Kauffman
2019, Proceedings of the National Academy of Sciences of the United States of America (116) 25707-25713
Newly emerging plants provide the best forage for herbivores. To exploit this fleeting resource, migrating herbivores align their movements to surf the wave of spring green-up. With new technology to track migrating animals, the Green Wave Hypothesis has steadily gained empirical support across a diversity of...
Simulating land cover change impacts on groundwater recharge under selected climate projections, Maui, Hawaiʻi
Laura Brewington, Victoria Keener, Alan Mair
2019, Remote Sensing (11)
This project developed an integrated land cover/hydrological modeling framework using remote sensing and geographic information systems (GIS) data, stakeholder input, climate information and projections, and empirical data to estimate future groundwater recharge on the Island of Maui, Hawaiʻi, USA. End-of-century mean annual groundwater recharge was estimated under...
Ecological effects of establishing a 40-year oasis protection system in a Northwestern China Desert
Guohua Wang, Seth M. Munson, Kailiang Yu, Ning Chen, Qianqian Gou
2019, Catena (187)
Aims: Desertification around oasis areas is a serious problem in semi-arid and arid regions, which is expected to continue into the future due to a rapidly increasing human population. Oasis protection systems are created to reverse desertification by recovering degraded soil and vegetation properties and improving ecosystem services. Most research...
Deglacial water-table decline in Southern California recorded by noble gas isotopes
Alan M. Seltzer, Jessica Ng, Wesley R. Danskin, Justin T. Kulongoski, Riley Gannon, Martin Stute, Jeffery P. Severinghaus
2019, Nature Communications (10)
Constraining the magnitude of past hydrological change may improve understanding and predictions of future shifts in water availability. Here we demonstrate that water-table depth, a sensitive indicator of hydroclimate, can be quantitatively reconstructed using Kr and Xe isotopes in groundwater. We present the first-ever measurements of these dissolved noble gas...
Evaluation of Potential Translocation Sites for an Imperiled Cyprinid, theHornyhead Chub
Brian T. Hickerson, Annika W. Walters
2019, Transactions of the American Fisheries Society (39) 205-218
Translocation of isolated species into suitable habitats may help secure vulnerable, geographically limited species. Due to the decline of Wyoming Hornyhead Chub Nocomis biguttatus, conservation actions such as translocation of populations within the plausible historical range are being considered to improve population redundancy and resiliency to disturbance events. Translocation of...
Direct measurements of copper speciation in basaltic glasses: Understanding the relative roles of sulfur and oxygen in copper complexation in melts
Antonio Lanzirotti, R. Lopaka Lee, Elisabet Head, Stephen R Sutton, Matthew Newville, Molly McCanta, Allan Lerner, Paul J. Wallace
2019, Geochimica et Cosmochimica Acta (267) 164-178
Micro-analytical determination of copper (Cu) speciation in natural magmatic glasses, equilibrated below the nickel – nickel oxide (NNO) buffer, reveals that two copper species are commonly stabilized in such basaltic melts. X-ray absorption fine structure (XAFS) spectroscopic analysis of basaltic matrix glasses and melt inclusions (MI) from samples of mid-ocean...
Time to branch out? Application of hierarchical survival models in plant phenology
Sarah Elmendorf, Theresa Crimmins, Katharine L. Gerst, Jake Weltzin
2019, Agricultural and Forest Meteorology (279)
The sensitivity of phenology to environmental drivers can vary across geography and species. As such, models developed to predict phenology are typically site- or taxon-specific. Generation of site- and taxon-specific models is limited by the intensive in-situ phenological monitoring effort required to generate sufficient data to parameterize each model. Where...
Rare earth element deposits in China: A review and new understandings
Yuling Xie, Philip Verplanck, Zengqian Hou, Richen Zhong
2019, Book chapter, Mineral deposits of China
No abstract available....
High rates of inflation during a noneruptive episode of seismic unrest at Semisopochnoi Volcano, Alaska in 2014–2015
Kimberly Degrandpre, Jeremy D. Pesicek, Zhong Lu, Heather R. DeShon, Diana Roman
2019, Journal of Geophysical Research (20) 6163-6186
Magma intrusion rate is a key parameter in eruption triggering but is poorly quantified in existing geodetic studies. Here we examine two episodes of rapid inflation in this context. Two noneruptive microseismic swarms were recorded at Semisopochnoi Volcano, Alaska in 2014–2015. We use differential SAR techniques and TerraSAR‐X images to...
Geometric targets for UAS Lidar
B. Wilkinson, H.A. Lassiter, A. Abd-Elrahman, Raymond Carthy, P. Ifju, E. Broadbent, N. Grimes
2019, Remote Sensing (11)
Lidar from small unoccupied aerial systems (UAS) is a viable method for collecting geospatial data associated with a wide variety of applications. Point clouds from UAS lidar require a means for accuracy assessment, calibration, and adjustment. In order to carry out these procedures, specific locations within the point cloud must...
Characterization of immunoglobulin light chain utilization and variable family diversity in rainbow trout
Katherine Rego, Eva Bengten, Melanie Wilson, John D. Hansen, Erin S Bromage
2019, Developmental and Comparative Immunology (104)
This study characterizes immunoglobulin light chain (IgL) expression and variable family usage in rainbow trout. IgL transcripts were generated by 5’ RACE from both immune and TNP-KLH immunized fish. Phylogenetic analysis revealed that the IgL variable regions clustered into seven different families: three kappa families (two newly described in this...
Validating a landsat time-series of fractional component cover across western U.S. Rangelands
Matthew B. Rigge, Collin G. Homer, Hua Shi, Debra K. Meyer
2019, Remote Sensing (11)
Western U.S. rangelands have been quantified as six fractional cover (0%–100%) components over the Landsat archive (1985–2018) at a 30 m resolution, termed the “Back-in-Time” (BIT) dataset. Robust validation through space and time is needed to quantify product accuracy. Here, we used field data collected concurrently with high-resolution satellite (HRS) images...
Isolation of methylmercury using distillation and anion-exchange chromatography for isotopic analyses in natural matrices
Tylor Rosera, Sarah E. Janssen, Michael T. Tate, Ryan F. Lepak, Jacob M. Ogorek, John F. DeWild, Christopher L. Babiarz, David P. Krabbenhoft, James P. Hurley
2019, Analytical and Bioanalytical Chemistry (412) 681-690
The development of mercury (Hg) stable isotope measurements has enhanced the study of Hg sources and transformations in the environment. As a result of the mixing of inorganic Hg (iHg) and methylmercury (MeHg) species within organisms of the aquatic food web, understanding species-specific Hg stable isotopic compositions is of significant...
Exposure and potential effects of pesticides and pharmaceuticals in protected streams of the US National Park Service southeast Region
Paul M. Bradley, Kristin M. Romanok, Jeffrey R. Duncan, William Battaglin, Jimmy Clark, Michelle Hladik, Bradley Huffman, Luke Iwanowicz, Celeste A. Journey, Kelly Smalling
2019, Science of the Total Environment (704)
Globally protected areas offer refugia for a broad range of taxa including threatened and endangered species. The United States National Park Service (NPS) manages public lands to preserve biodiversity, but increasing park visitation and development of surrounding landscapes increase exposure to and effects from bioactive contaminants. The risk (exposure and...
Depth to bedrock based on modeling of gravity data of the eastern part of Edwards Air Force Base, California
Victoria Langenheim, Andrew Morita, Allen H. Christensen, Geoffrey Cromwell, Christopher P. Ely
2019, Open-File Report 2019-1128
We describe a gravity survey acquired to determine the thickness of basin-fill deposits (depth to bedrock) and to delineate geologic structures that might influence groundwater flow beneath the eastern part of Edwards Air Force Base, California. Inversion of these gravity data combined with geologic map and well information provides an...
Response of tidal marsh vegetation to pulsed increases in flooding and nitrogen
Meagan M McCoy, Taylor M Sloey, Rebecca J. Howard, Mark W. Hester
2019, Wetlands Ecology and Management (28) 119-135
Worldwide, human activities have modified hydrology and nutrient loading regimes in coastal wetlands. Understanding the interplay between these drivers and subsequent response of wetland plant communities is essential to informing wetland management and restoration efforts. Recent restoration strategies in Louisiana proposes to use sediment diversions from the Mississippi River to...
Yukon-Kuskokwim Delta Berry Outlook: Final Report
Nicole M. Herman-Mercer, Rachel A. Loehman
2019, Report
No abstract available. ...
Developing and optimizing shrub parameters representing sagebrush (Artemisia spp.) ecosystems in the Northern Great Basin using the Ecosystem Demography (EDv2.2) model
Karun Pandit, Hamid Dasthi, Nancy Glenn, Alejandro Flores, Kaitlin C. Maguire, Douglas J. Shinneman, Gerald Flerchinger, Aaron Fellow
2019, Geoscientific Model Development (12) 4585-4601
Ecosystem dynamic models are useful for understanding ecosystem characteristics over time and space because of their efficiency over direct field measurements and applicability to broad spatial extents. Their application, however, is challenging due to internal model uncertainties and complexities arising from distinct qualities of the ecosystems being analyzed. The sagebrush-steppe...
