Machine-learning models to map pH and redox conditions in groundwater in a layered aquifer system, Northern Atlantic Coastal Plain, eastern USA
Leslie A. DeSimone, Jason P. Pope, Katherine Marie Ransom
2020, Journal of Hydrology: Regional Studies (30)
Study regionThe study was conducted in the Northern Atlantic Coastal Plain aquifer system, in the eastern USA.Study focusGroundwater pH and redox conditions are fundamental chemical characteristics controlling the distribution of many contaminants of concern for drinking water or...
Frequency of extreme freeze events controls the distribution and structure of black mangroves (Avicennia germinans) near their northern range limit in coastal Louisiana
Michael Osland, Richard Day, Thomas C. Michot
2020, Diversity and Distributions (26) 1366-1382
AimClimate change is expected to result in the tropicalization of coastal wetlands in the northern Gulf of Mexico, as warming winters allow tropical mangrove forests to expand their distribution poleward at the expense of temperate salt marshes. Data limitations near mangrove range limits have hindered understanding of...
Refining genetic boundaries for Agassiz’s desert tortoise (Gopherus agassizii) in the western Sonoran Desert: The influence of the Coachella Valley on gene flow among populations in southern California
Jeffrey E. Lovich, Taylor Edwards, Kristin H. Berry, Shellie R. Puffer, Kristy L. Cummings, Ennen Joshua R., Mickey Agha, Rachel Wood, Kathleen D. Brundige, Robert W. Murphy
2020, Frontiers of Biogeography (12)
Understanding the influence of geographic features on the evolutionary history and population structure of a species can assist wildlife managers in delimiting genetic units (GUs) for conservation and management. Landscape features including mountains, low elevation depressions, and even roads can influence connectivity and gene flow among Agassiz’s desert tortoise (Gopherus...
Migratory behavior and winter geography drive differential range shifts of eastern birds in response to recent climate change
Clark Rushing, Andy Royle, David Ziolkowski, Keith L. Pardieck
2020, Proceedings of the National Academy of Sciences of the United States of America (117) 12897-12903
Over the past half century, migratory birds in North America have shown divergent population trends relative to resident species, with the former declining rapidly and the latter increasing. The role that climate change has played in these observed trends is not well understood, despite significant warming over this period. We...
'Dust in the wind’ from source-to-sink: Analysis of the 14-15 April 2015 storm in Utah
Kathleen Nicoll, Maura Hahnenberger, Harland L. Goldstein
2020, Aeolian Research (46)
On 14–15 April 2015, an intense intermountain cyclone in the western USA caused high winds and a dust storm that degraded air quality in the eastern Great Basin, and deposited dust-on-snow (DOS) in the Wasatch Range near Salt Lake City, Utah. We analyzed the...
Surface displacement distributions for the July 2019 Ridgecrest, California earthquake ruptures
Christopher DuRoss, Ryan D. Gold, Timothy E. Dawson, Katherine M. Scharer, Katherine J. Kendrick, Sinan Akciz, Stephen J. Angster, Jeffery Bachhuber, Steven Bacon, Scott E.K. Bennett, Luke Blair, Benjamin A. Brooks, Thomas Bullard, W. Paul Burgess, Colin Chupik, Michael DeFrisco, Jaime Delano, James D. Dolan, Erik Frost, Nick Graehl, Elizabeth Haddon, Alexandra Elise Hatem, Janis Hernandez, Christopher S. Hitchcock, Kennth Hudnut, Jessica Thompson Jobe, Richard D Koehler, Ozgur Kozaci, Tyler C. Ladinsky, Christopher Madugo, Devin McPhillips, Christopher Milliner, Alexander Morelan, Brian Olson, Jason Patton, Belle E. Philibosian, Alexandra J. Pickering, Ian Pierce, Daniel J. Ponti, Gordon G. Seitz, Eleanor Spangler, Brian J. Swanson, Kate Thomas, Jerome Treiman, Francesca Valencia, Alana Williams, Robert Zinke
2020, Bulletin of the Seismological Society of America (110) 1400-1418
Surface rupture in the 2019 Ridgecrest, California, earthquake sequence occurred along two orthogonal cross faults and includes dominantly left‐lateral and northeast‐striking rupture in the Mw">Mw 6.4 foreshock and dominantly right‐lateral and northwest‐striking rupture in the <span class="inline-formula...
Estimating the drivers of species distributions with opportunistic data using mediation analysis
D. B. Huberman, B. J. Reich, Krishna Pacifici, Jaime A. Collazo
2020, Ecosphere (11)
Ecological occupancy modeling has historically relied on high-quality, low-quantity designed-survey data for estimation and prediction. In recent years, there has been a large increase in the amount of high-quantity, unknown-quality opportunistic data. This has motivated research on how best to combine these two data sources in order to optimize inference....
Geochemical characterization of groundwater evolution south of Grand Canyon, Arizona (USA)
Kimberly R. Beisner, John E. Solder, Fred D. Tillman, Jessica R. Anderson, Ronald C. Antweiler
2020, Hydrogeology Journal (28) 1615-1633
Better characterization of the geochemical evolution of groundwater south of Grand Canyon, Arizona (USA), is needed to understand natural conditions and assess potential effects from breccia-pipe uranium mining in the region. Geochemical signatures of groundwater at 28 sampling locations were evaluated; baseline concentrations for select trace elements (As, B, Ba,...
Quantifying gas emissions associated with the 2018 rift eruption of Kīlauea Volcano using ground-based DOAS measurements
Christoph Kern, Allan Lerner, Tamar Elias, Patricia A. Nadeau, Lacey Holland, Peter J. Kelly, Cynthia Werner, Laura E. Clor, Michael Cappos
2020, Bulletin of Volcanology (82)
Starting on 3 May 2018, a series of eruptive fissures opened in Kīlauea Volcano’s lower East Rift Zone (LERZ). Over the course of the next 3 months, intense degassing accompanied lava effusion from these fissures. Here, we report on ground-based observations of the gas emissions associated with Kīlauea’s 2018 eruption....
Origin and geochemistry of formation waters from the lower Eagle Ford Group, Gulf Coast Basin, south central Texas
Mark A Engle, Colin A. Doolan, Janet K. Pitman, Matthew S. Varonka, Jessica Chenault, William H. Orem, Peter B. McMahon, Aaron M. Jubb
2020, Chemical Geology (550)
The lower Eagle Ford Group (LEFG) is one of the most productive continuous hydrocarbon plays in the United States but few associated produced waters data and minimal interpretation have been published. This effort focuses on results from compositional and isotopic data from 39 produced water samples collected from horizontal wells...
Conceptual framework and approach for conducting a geoenvironmental assessment of undiscovered uranium resources
Tanya J. Gallegos, Katherine Walton-Day, Robert R. Seal, II
2020, Scientific Investigations Report 2018-5104
This report presents a novel conceptual framework and approach for conducting a geologically based environmental assessment, or geoenvironmental assessment, of undiscovered uranium resources within an area likely to contain uranium deposits. The framework is based on a source-to-receptor model that prioritizes the most likely contaminant sources, contaminant pathways, and affected...
The impact of lime additions on mercury dynamics in stream chemistry and macroinvertebrates: A comparison of watershed and direct stream addition management strategies
Geoffrey D. Millard, Karen Riva-Murray, Douglas A. Burns, Mario S. Montesdeoca, Charles T. Driscoll
2020, Ecotoxicology (29) 1627-1643
Acid deposition has declined across eastern North America and northern Europe due to reduced emissions of sulfur and nitrogen oxides. Ecosystem recovery has been slow with limited improvement in surface water chemistry. Delayed recovery has encouraged acid-neutralization strategies to accelerate recovery of impaired biological communities. Lime application has been shown...
Selected geologic maps of the Kodiak batholith and other Paleocene intrusive rocks, Kodiak Island, Alaska
David W. Farris, Peter J. Haeussler
2020, Scientific Investigations Map 3441
Kodiak Island in southern Alaska is one of the premier examples globally for the study of forearc magmatism. This location contains two Paleocene intrusive belts that formed due to the subduction of a migrating spreading ridge and slab-window: the Kodiak batholith and the trenchward magmatic belt. These magmatic rocks are...
A non-linear relationship between marsh size and sediment trapping capacity compromises salt marshes’ resilience to sea-level rise
Carmine Donatelli, Xiaohe Zhang, Neil K. Ganju, Alfredo Aretxabaleta, Sergio Fagherazzi, Nicoletta Leonardi
2020, Geology (48) 966-970
Global assessments predict the impact of sea-level rise on salt marshes with present-day levels of sediment supply from rivers and the coastal ocean. However, these assessments do not consider that variations in marsh extent and the related reconfiguration of intertidal area affect local sediment dynamics, ultimately...
Groundwater levels and generalized potentiometric surfaces, former Naval Air Warfare Center, West Trenton, New Jersey, 2018
Alex R. Fiore, Pierre J. Lacombe
2020, Open-File Report 2020-1016
Groundwater-level conditions, generalized groundwater potentiometric surfaces, and generalized flow directions at the decommissioned Naval Air Warfare Center in West Trenton, New Jersey, were evaluated for calendar year 2018. Groundwater levels measured continuously in five on-site wells and one nearby off-site well were plotted as hydrographs for January 1, 2018, through...
Low-level detection of SFD-causing Ophidiomyces on Burmese Pythons in southwest Florida, with confirmation of the pathogen on co-occurring native snakes
Brad Glorioso, Ian A. Bartoszek, Jeffrey M. Lorch
2020, Herpetological Review (51) 245-247
Snake fungal disease (SFD), or ophidiomycosis, is caused by the fungus Ophidiomyces ophiodiicola (Allender et al. 2015; Lorch et al. 2015). SFD is widespread across wild populations in the eastern United States (Lorch et al. 2016) and is known to infect more than 30 species of snake in North America...
Repeatable source, path, and site effects from the 2019 Ridgecrest M7.1 earthquake sequence
Grace Alexandra Parker, Annemarie S. Baltay Sundstrom, John Rekoske, Eric M. Thompson
2020, Bulletin of the Seismological Society of America (110) 1530-1548
We use a large instrumental dataset from the 2019 Ridgecrest earthquake sequence (Rekoske et al., 2019, 2020) to examine repeatable source‐, path‐, and site‐specific ground motions. A mixed‐effects analysis is used to partition total residuals relative to the Boore et al. (2014;...
Optimization of tidal marsh management at the Cape May and Supawna Meadows National Wildlife Refuges, New Jersey, through use of structured decision making
Hilary A. Neckles, James E. Lyons, Jessica L. Nagel, Susan C. Adamowicz, Toni Mikula, Brian Braudis, Heidi Hanlon
2020, Open-File Report 2020-1055
Structured decision making is a systematic, transparent process for improving the quality of complex decisions by identifying measurable management objectives and feasible management actions; predicting the potential consequences of management actions relative to the stated objectives; and selecting a course of action that maximizes the total benefit achieved and balances...
Seismicity rate change at the Coso Geothermal Field following the July 2019 Ridgecrest M7.1 earthquake
Joern Kaven
2020, Bulletin of the Seismological Society of America (110) 1728-1735
Many geothermal and volcanic regions experience remote and regional triggering following large earthquakes. The transient or permanent changes in stresses acting on faults and fractures can lead to changes in seismicity rates following either the passage of teleseismic waves or the permanent change in stresses following regional events. One such...
Assessing the risks posed by SARS-CoV-2 in and via North American bats — Decision framing and rapid risk assessment
Michael C. Runge, Evan H. Campbell Grant, Jeremy T. H. Coleman, Jonathan D. Reichard, Samantha E.J. Gibbs, Paul M. Cryan, Kevin J. Olival, Daniel P. Walsh, David S. Blehert, M. Camille Hopkins, Jonathan M. Sleeman
2020, Open-File Report 2020-1060
The novel β-coronavirus, SARS-CoV-2, may pose a threat to North American bat populations if bats are exposed to the virus through interaction with humans, if the virus can subsequently infect bats and be transmitted among them, and if the virus causes morbidity or mortality in bats. Further, if SARS-CoV-2 became...
Modeling geologic sequestration of carbon dioxide in a deep saline carbonate reservoir with TOUGH2–ChemPlugin, a new tool for reactive transport modeling
Tina L. Roberts-Ashby, Peter M. Berger, Jeffrey A. Cunningham, Ram Kumar, Madalyn S. Blondes
2020, Environmental Geosciences (27) 103-116
This paper outlines the development and demonstration of a new tool, TOUGH2–ChemPlugin (T2CPI) for predicting rock–water–CO2 interaction following injection of supercritical CO2 into a heterogeneous carbonate system. Specifically, modeling capabilities of TOUGH2, which examines multiphase flow and supercritical CO2 behavior, were combined with the geochemical modeling capabilities of The Geochemist’s Workbench® (GWB), using ChemPluginTM....
Locality note for rubber boa
Joseph A. Tomoleoni, Richard F Hoyer
2020, Herpetological Review (51)
CHARINA BOTTAE BOTTAE (N. Rubber Boa), USA: CALIFORNIA: Monterey Co.: Landels-Hill Big Creek Reserve, east side of Hwy. 1, 80 km (50 miles) south of Carmel, Calif., (36.0719055 N 121.5991555 W) 19 June, 2009; (36.0703611 N 121.5982222 W) 06 July 2009; (36.9516666 N 121.5991944 W) 27...
Climate change projected to reduce prescribed burning opportunities in the south-eastern United States
John A Kupfer, Adam J. Terando, Peng Gao, Casey Teske, J Kevin Hiers
2020, International Journal of Wildland Fire (29) 764-778
Prescribed burning is a critical tool for managing wildfire risks and meeting ecological objectives, but its safe and effective application requires that specific meteorological criteria (a ‘burn window’) are met. Here, we evaluate the potential impacts of projected climatic change on prescribed burning in the south-eastern United States by applying...
Examining the mechanisms of species responses to climate change: Are there biological thresholds?
William DeLuca, Thomas W. Bonnot, Alexej P. K. Siren, Radley M. Horton, Curtice R. Griffin, Toni Lyn Morelli
2020, Report
Climate-change-driven shifts in distribution and abundance have been documented in many species. However, in order to better predict species responses, managers are seeking to understand the mechanisms that are driving these changes, including any thresholds that might soon be crossed. Leveraging the research that has already been supported by...
Trends in oyster populations in the northeastern Gulf of Mexico: An assessment of river discharge and fishing effects over time and space
J. F Moore, W. E Pine, P. C Frederick, Sarah Becker, Marcos Moreno, Michael Dodrill, Matthew Boone, L Sturmer, Simeon Yurek
2020, Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science (12) 191-204
Within the Big Bend region of the northeastern Gulf of Mexico, one of the least developed coastlines in the continental USA, intertidal and subtidal populations of eastern oyster Crassostrea virginica (hereafter referred to as “oyster”) are a critical ecosystem and important economic constituent. We assessed trends in intertidal oyster populations,...
