Interferometric synthetic aperture radar study of recent eruptive activity at Shrub mud volcano, Alaska
Yufen Niu, Daniel Dzurisin, Zhong Lu
2019, Journal of Volcanology and Geothermal Research (387)
Shrub mud volcano is one of three large mud volcanoes that comprise the Klawasi Group in the Copper River Basin of southcentral Alaska. Except for minor discharges in the mid-1950s when the group was first described, Shrub was dormant prior to its reactivation in summer 1996. From 1997 to 1999,...
The effects of management practices on grassland birds—Marbled Godwit (Limosa fedoa)
Jill A. Shaffer, Lawrence D. Igl, Douglas H. Johnson, Marriah L. Sondreal, Christopher M. Goldade, Melvin P. Nenneman, Betty R. Euliss
2019, Professional Paper 1842-H
Keys to Marbled Godwit (Limosa fedoa) management include providing large expanses of short, sparsely to moderately vegetated landscapes that include native grasslands and wetland complexes. Optimal wetland complexes should contain a diversity of wetland classes and sizes, such as ephemeral, temporary, seasonal, semipermanent, permanent, and alkali wetlands, as well as...
Activity patterns of cave-dwelling bat species during pre-hibernation swarming and post-hibernation emergence in the central Appalachians
Michael S. Muthersbaugh, W. Mark Ford, Alexander Silvis, Karen E. Powers
2019, Diversity (11)
In North America, bat research efforts largely have focused on summer maternity colonies and winter hibernacula, leaving the immediate pre- and post-hibernation ecology for many species unstudied. Understanding these patterns and processes is critical for addressing potential additive impacts to White-nose Syndrome (WNS)-affected bats, as autumn is...
Numerical model simulations of potential changes in water levels and capture of natural discharge from groundwater withdrawals in Snake Valley and adjacent areas, Utah and Nevada
Melissa D. Masbruch
2019, Open-File Report 2019-1083
The National Park Service (NPS) and the Bureau of Land Management (BLM) are concerned about cumulative effects of groundwater development on groundwater-dependent resources managed by, and other groundwater resources of interest to, these agencies in Snake Valley and adjacent areas, Utah and Nevada. Of particular concern to the NPS and...
Crustal magmatism and anisotropy beneath the Arabian Shield - A cautionary tale
Paul A. Bedrosian, Jared R. Peacock, Maher K. Al-Dhahry, Adel Shareef, D. W. Feucht, Hani M. Zahran
2019, Journal of Geophysical Research B: Solid Earth (124) 10153-10179
Volcanism in Saudi Arabia includes a historic eruption close to the holy city of Al Madinah. As part of a volcanic hazard assessment of this area, magnetotelluric (MT) data were collected to investigate the structural setting, the distribution of melt within the crust, and the mantle source of volcanism. Interpretation...
Tritium as an indicator of modern, mixed, and premodern groundwater age
Bruce D. Lindsey, Bryant C. Jurgens, Kenneth Belitz
2019, Scientific Investigations Report 2019-5090
Categorical classification of groundwater age is often used for the assessment and understanding of groundwater resources. This report presents a tritium-based age classification system for the conterminous United States based on tritium (3H) thresholds that vary in space and time: modern (recharged in 1953 or later), if the measured value...
Modeling spatially and temporally complex range dynamics when detection is imperfect
Clark S. Rushing, J. Andrew Royle, David Ziolkowski, Keith L. Pardieck
2019, Scientific Reports (9)
Species distributions are determined by the interaction of multiple biotic and abiotic factors, which produces complex spatial and temporal patterns of occurrence. As habitats and climate change due to anthropogenic activities, there is a need to develop species distribution models that can quantify these complex range dynamics. In this paper,...
Evaluation of groundwater-flow models for estimating drawdown from proposed groundwater development in Tule Desert, Nevada
Keith J. Halford
2019, Open-File Report 2019-1091
At the request of the Bureau of Land Management (BLM), the U.S. Geological Survey (USGS) is releasing with this open-file report (OFR) a previously unpublished review and comparison of two numerical models for Tule Desert, Nevada. The original review was performed in spring 2013, and only minor editorial revisions were...
Comparison of methods for modeling fractional cover using simulated satellite hyperspectral imager spectra
Philip E. Dennison, Yi Qi, Susan K. Meerdink, Raymond F. Kokaly, David R. Thompson, Craig S.T. Daughtry, Miguel Quemada, Dar A. Roberts, Paul Gader, Erin Wetherley, Izaya Numata, Keely L. Roth
2019, Remote Sensing (11)
Remotely sensed data can be used to model the fractional cover of green vegetation (GV), non-photosynthetic vegetation (NPV), and soil in natural and agricultural ecosystems. NPV and soil cover are difficult to estimate accurately since absorption by lignin, cellulose, and other organic molecules cannot be resolved by broadband multispectral data....
Adult survival of common eiders in Maine
R. B. Allen, Daniel McAuley, G. Zimmerman
2019, Northeastern Naturalist (26) 656-671
Although most species of sea ducks are poorly studied, much is known about the population dynamics of the American race of Somateria mollissma dresseri (Common Eider). Although Common Eiders typically have high adult survival and low recruitment rates, their populations in Maine have declined since the early 1990s. Wildlife managers hypothesized this...
Benthic algal (Periphyton) growth rates in response to nitrogen and phosphorus: Parameter estimation for water quality models
Travis S. Schmidt, Christopher Konrad, Janet L. Miller, Stephen D. Whitlock, Craig A. Stricker
2019, Journal of the American Water Resources Association (55) 1479-1491
Nitrogen (N) and phosphorus (P) are important pollutants that can stimulate nuisance blooms of algae. Water-quality models (e.g., WASP, CE-QUAL-R1, CE-QUAL-ICM, QUAL2k) are valuable and widely used management tools for algal accrual because of excess nutrients in the presence of other limiting factors. These models utilize the Monod and Droop...
Stratigraphic analysis of Corte Madera Creek flood control channel deposits
Daniel N. Livsey, Paul A. Work, Maureen A. Downing-Kunz
2019, Scientific Investigations Report 2019-5070
Sedimentation in a channel can reduce flood conveyance capability and potentially place nearby property and life at risk from flooding. In 1998, Marin County Public Works dredged the concrete-lined segment of Corte Madera Creek, which drains a hilly and largely urbanized watershed that terminates in San Francisco Bay, California. From...
Phosphorus and nitrogen transport in the binational Great Lakes Basin estimated using SPARROW watershed models
Dale M. Robertson, David A. Saad, Glenn A. Benoy, Ivana Vouk, Gregory E. Schwarz, Michael T Laitta
2019, Journal of the American Water Resources Association (55) 1401-1424
Eutrophication problems in the Great Lakes are caused by excessive nutrient inputs (primarily phosphorus, P, and nitrogen, N) from various sources throughout its basin. In developing protection and restoration plans, it is important to know where and from what sources the nutrients originate. As part of a binational effort, Midcontinent...
Floodplains provide important amphibian habitat despite multiple ecological threats
Meredith Holgerson, Adam Duarte, Marc Hayes, Michael J. Adams, Julie A. Tyson, Keith Douville, Angela Strecker
2019, Ecosphere (10)
Floodplain ponds and wetlands are productive and biodiverse ecosystems, yet they face multiple threats including altered hydrology, land use change, and non‐native species. Protecting and restoring important floodplain ecosystems requires understanding how organisms use these habitats and respond to altered environmental conditions. We developed Bayesian models to evaluate occupancy of...
Evaluating the factors responsible for post-fire water quality response in forests of the western USA
Ashley J. Rust, Samuel Saxe, John E. McCray, Charles C. Rhoades, Terri S. Hogue
2019, International Journal of Wildland Fire (28) 769-784
Wildfires commonly increase nutrient, carbon, sediment, and metal inputs to streams yet the factors responsible for the type, magnitude and duration of water quality effects are poorly understood. Prior work by the current authors found increased nitrogen, phosphorus and cation exports were common the first five post-fire years from a...
PaCTS 1.0: A crowdsourced reporting standard for paleoclimate data
Natalie M. Kehrwald, Deborah Khider, Julien Emile-Geay, Nicholas P. McKay, Yolanda Gili, Daniel Garijo, Varun Ratnakar, Peter Brewer, Adam Csank, Emilie Dassie, Kristine Delong, Thomas Felix, William Gray, Lucas Jonkers, Michael Kahle, Darrell S. Kaufman, Julie N. Richey, Andreas Schmittner, Elaine Kennedy Sutherland, Montserrat Alonso-Garcia, Bertrand Sebastian, Oliver Bothe, Andrew Bunn, Manuel Chevalier, Pierre Francus, Amy Frappier, Simon Goring, Belen Martrat, Helen V. McGregor, Kathryn J. Allen, Fabien Arnaud, Yarrow L. Axford, Timothy T. Barrows, Lucie Bazin, Pilaar Birch, Elizabeth Bradley, Joshua Bregy, Emilie Capron, Olivier Cartapanis, Hong-Wei Chiang, Kim Cobb, Maxime Debret, Rene Dommain, Jianghui Du, Kelsey Dyez, Suellyn Emerick, Michael Erb, Georgina Falster, Walter Finsinger, Daniel Fortier, Nicolas Gauthier, Steven George, Eric Grimm, Jennifer Hertzberg, Fiona Hibbert, Aubrey Hillman, William Hobbs, Matthew Huber, Anna L. C. Hughes, Samuel Jaccard, Ruan Jiaoyang, Markus Kienast, Bronwen Konecky, Gael Le Roux, Vyacheslav Lyubchich, Valdir Novello, Lydia Olaka, Judson W. Partin, Christof Pearce, Steven J. Phipps, Cecile Pignol, Natalia Pietrowska, Maria-Serena Poli, Alexander Prokopenko, Franciele Schwanck, Christian Stepanek, George E. A. Swann, Richard Telford, Elizabeth R. Thomas, Zoe Thomas, Sarah Truebe, Lucien von Gunten, Amanda Waite, Nils Weitzel, Bruno Wilhelm, John B. Williams, Mai Winstrup, Ning Zhao, Yuxin Zhou
2019, Paleoceanography and Paleoclimatology (34) 1570-1596
The progress of science is tied to the standardization of measurements, instruments, and data. This is especially true in the Big Data age, where analyzing large data volumes critically hinges on that data being standardized. Accordingly, the lack of community-sanctioned data standards in paleoclimatology has largely precluded the benefits of...
Paleo calendar-effect adjustments in time-slice and transient climate-model simulations (PaleoCalAdjust v1.0): Impact and strategies for data analysis
Patrick J. Bartlein, Sarah Shafer
2019, Geoscientific Model Development (12) 3889-3913
The “paleo calendar effect” is a common expression for the impact that changes in the length of months or seasons over time, related to changes in the eccentricity of Earth's orbit and precession, have on the analysis or summarization of climate-model output. This effect can have significant implications for paleoclimate...
Updating estimates of low-streamflow statistics to account for possible trends
Annalise G. Blum, Stacey A. Archfield, Robert M. Hirsch, Richard M Vogel, Julie E. Kiang, Robert W. Dudley
2019, Hydrologic Sciences Journal (6) 1404-1414
Accurate estimators of streamflow statistics are critical to the design, planning, and management of water resources. Given increasing evidence of trends in low-streamflow, new approaches to estimating low-streamflow statistics are needed. Here we investigate simple approaches to select a recent subset of the low-flow record to update...
Back to the future: Rebuilding the Everglades
Fred H. Sklar, James M. Beerens, Laura A. Brandt, Carlos A. Coronado-Molina, Steven M Davis, Tom Frankovich, Christopher Madden, Agnes McLean, Joel C. Trexler, Walter Wilcox
2019, Book chapter, The Coastal Everglades: The Dynamics of Social-Ecological Transformation in the South Florida Landscape
Society values landscapes that are engrained in cultural tradition and have a rich connection with human history. As such, there has been a concerted effort to look at the pristine past and develop plans to move the past into the future. However, bringing the past back is constrained by hysteretic...
Framework for using downscaled climate model projections in ecological experiments to quantify plant and soil responses
Rachel K. Owen, Elisabeth B. Webb, Keith W. Goyne, Bohumil M. Svoma, Sagar Gautam
Iadine Chades, editor(s)
2019, Ecosphere (10) 1-19
Soil and plant responses to climate change can be quantified in controlled settings. However, the complexity of climate projections often leads researchers to evaluate ecosystem response based on general trends, rather than specific climate model outputs. Climate projections capture spatial and temporal climate extremes and variability that are lost when...
Absence of magnetite microlites, geochemistry of magnetite veins and replacements in IOA deposits, SE Missouri, USA: Relations to intermediate intrusions
Corey J. Meighan, Albert H. Hofstra, David Adams, Erin E. Marsh, Heather A. Lowers, Alan Koenig
2019, Conference Paper, Life with Ore Deposits on Earth – 15th SGA Biennial Meeting 2019
The paragenesis, textures, and chemical compositions of magnetite in two mafic to intermediate intrusions and four IOA deposits in SE Missouri were studied to discriminate between igneous and hydrothermal sources. In this study, we found that replacement magnetite with mineral inclusion-rich cores yields erroneously high Ti, Al, Si, Mg,...
The effect of resolution on terrain feature extraction
Samantha T. Arundel, Wenwen Li, Xiran Zhou
2019, Conference Paper, Geomorphometry 2018
Recent increase in the production of high-resolution digital elevation models (DEMs) from lidar data has led to interest in their use for terrain mapping. Although the impact of different resolutions has been studied relative to terrain characteristics like roughness, slope and curvature, its relationship to the extraction of terrain features...
Sequestration and transformation in chemically enhanced treatment wetlands: DOC, DBPPs and Nutrients
Philip A. M. Bachand, Sandra M. Bachand, Tamara E. C. Kraus, Dylan Stern, Yan Ling Liang, William R. Horwath
2019, Journal of Environmental Engineering (145)
We examined the effectiveness of chemically enhanced treatment wetlands (CETWs), wetlands that received water treated with coagulants, to remove dissolved organic carbon (DOC), disinfection byproduct precursors (DBPPs), nutrients and metals from agricultural drain water. Wetlands consisted of controls with no coagulant addition, ferric sulfate dosed and polyaluminum chloride dosed treatments....
Surface rupture and distributed deformation revealed by optical satellite imagery: The intraplate 2016 Mw 6.0 Petermann Ranges earthquake, Australia
Ryan D. Gold, Dan Clark, William D. Barnhart, Tamarah King, Mark Quigley, Richard W. Briggs
2019, Geophysical Research Letters (46) 10394-10403
High-resolution optical satellite imagery is used to quantify vertical surface deformation associated with the intraplate 20 May 2016 Mw 6.0 Petermann Ranges earthquake, Northern Territory, Australia. The 21 ╓ 1 km long NW-trending rupture resulted from reverse motion on a northeast-dipping fault. Vertical surface offsets of up to 0.7 ╓...
Arsenic, antimony, mercury, and water temperature in streams near Stibnite mining area, central Idaho, 2011–17
Austin K. Baldwin, Alexandra B. Etheridge
2019, Scientific Investigations Report 2019-5072
Mineralization and historical mining of stibnite (antimony sulfide), tungsten, gold, silver, and mercury in the headwaters of the East Fork of the South Fork Salmon River (EFSFSR) near the former town of Stibnite in central Idaho resulted in water-quality impairments related to mercury, antimony, and arsenic. Additionally, mining-related disturbances and...
