Biogeochemical and hydrologic synergy control mercury fate in an arid land river-reservoir system
Brett Poulin, Michael T. Tate, Jacob M. Ogorek, Sara E. Breitmeyer, Austin K. Baldwin, Alysa Muir Yoder, Reed C. Harris, Jesse Naymik, Nick Gastelecutto, Charles Hoovestol, Christopher F. Larsen, Ralph Myers, George R. Aiken, David P. Krabbenhoft
2023, Environmental Science: Processes & Impacts
Reservoirs in arid landscapes provide critical water storage and hydroelectric power but influence the transport and biogeochemical cycling of mercury (Hg). Improved management of reservoirs to mitigate the supply and uptake of bioavailable methylmercury (MeHg) in aquatic food webs will benefit from a mechanistic understanding of inorganic divalent Hg...
Marmots do not drink coffee: Human urine contributions to the nitrogen budget of a popular national park destination
Jill Baron, Timothy Weinmann, Varun Kirk Acharya, Caitlin Charlton, Koren Nydick, Scott Esser
2023, Ecosphere (14)
Reactive nitrogen (Nr) concentrations are higher than expected for mountain lakes in Rocky Mountain National Park, and for many years, high Nr concentrations have been attributed to atmospheric Nr deposition from regional and more distant emission sources, including combustion of fossil fuels and agricultural...
Summary and conclusions
John A. Izbicki, Krishangi D. Groover, Whitney A. Seymour, David M. Miller, John G. Warden, Laurence G. Miller
2023, Professional Paper 1885-J
Executive SummaryChromium concentrations in rock and aquifer material in Hinkley and Water Valleys in the Mojave Desert, 80 miles northeast of Los Angeles, California, are generally low compared to the average chromium concentration of 185 milligrams per kilogram (mg/kg) in the average bulk continental crust. Chromium concentrations in felsic, coarse-textured...
Sequestration and reoxidation of chromium in experimental microcosms
Laurence G. Miller, Callum E. Bobb, Andrea L. Foster, Emily G. Wright, Stacy C. Bennett, Krishangi D. Groover, John A. Izbicki
2023, Professional Paper 1885-I
Groundwater containing hexavalent chromium, Cr(VI), downgradient from the Pacific Gas and Electric Company (PG&E) Hinkley compressor station in the Mojave Desert, 80 miles northeast of Los Angeles, California, is undergoing bioremediation using added ethanol as a reductant in a volume of the aquifer defined as the in situ reactive zone...
Predevelopment water levels, groundwater recharge, and selected hydrologic properties of aquifer materials, Hinkley and Water Valleys, California
Krishangi D. Groover, John A. Izbicki, Whitney A. Seymour, Anthony A. Brown, Randall E. Bayless, Carole D. Johnson, Katherine L. Pappas , Gregory A. Smith, Dennis A. Clark, Joshua Larsen, Meghan C. Dick, Lorraine E. Flint, Christina L. Stamos, John G. Warden
2023, Professional Paper 1885-H
Hydrologic and geophysical data were collected to support updates to an existing groundwater-flow model of Hinkley Valley, California, in the Mojave Desert about 80 miles northeast of Los Angeles, California. These data provide information on predevelopment (pre-1930) water levels, groundwater recharge, and selected hydrologic properties of aquifer materials.A predevelopment groundwater-level...
Evaluation of natural and anthropogenic (human-made) hexavalent chromium
John A. Izbicki, John G. Warden, Krishangi D. Groover, Whitney A. Seymour
2023, Professional Paper 1885-G
Hexavalent chromium, Cr(VI), was released between 1952 and 1964 from the Pacific Gas and Electric Company (PG&E) Hinkley compressor station, in the Mojave Desert about 80 miles northeast of Los Angeles, California. Geologic, geochemical, and hydrologic data from more than 100 wells collected between March 2015 and November 2017 were...
Environmental tracers of groundwater source, age, and geochemical evolution
John G. Warden, John A. Izbicki, Jürgen Sültenfuß, Kathleen Scheiderich, John Fitzpatrick
2023, Professional Paper 1885-F
Hexavalent chromium, Cr(VI), was discharged in cooling wastewater to unlined surface ponds from 1952 to 1964 and reached the underlying unconsolidated aquifer at the Pacific Gas and Electric Company (PG&E) Hinkley compressor station in the Mojave Desert, 80 miles northeast of Los Angeles, California. A suite of environmental tracers was...
Groundwater chemistry and hexavalent chromium
John A. Izbicki, R. Blaine McCleskey, Carmen A. Burton, Dennis A. Clark, Gregory A. Smith
2023, Professional Paper 1885-E
Water samples collected by the U.S. Geological Survey from more than 100 wells between March 2015 and November 2017 in Hinkley and Water Valleys, in the Mojave Desert 80 miles northeast of Los Angeles, California, were analyzed for field parameters, major ions, nutrients, and selected trace elements, including hexavalent chromium,...
Analyses of regulatory water-quality data
John A. Izbicki, Whitney A. Seymour
2023, Professional Paper 1885-D
Between 1952 and 1964, hexavalent chromium, Cr(VI), was released into groundwater from the Pacific Gas and Electric Company (PG&E) Hinkley compressor station in the Mojave Desert 80 miles northeast of Los Angeles, California. The Pacific Gas and Electric Company has monitored groundwater near Hinkley, California, for Cr(VI) and other constituents...
Chromium in minerals and selected aquifer materials
Krishangi D. Groover, John A. Izbicki, William Benzel, Jean Morrison, Andrea L. Foster
2023, Professional Paper 1885-C
Between 1952 and 1964, hexavalent chromium, Cr(VI), was released into groundwater from a Pacific Gas and Electric Company (PG&E) compressor station in Hinkley, California, in the western Mojave Desert 80 miles northeast of Los Angeles, California. In 2015, the extent of anthropogenic Cr(VI) in groundwater in Hinkley and Water Valleys...
Survey of chromium and selected element concentrations in rock, alluvium, and core material
John A. Izbicki, Krishangi D. Groover
2023, Professional Paper 1885-B
Between 1952 and 1964, hexavalent chromium, Cr(VI), was released into groundwater from the Pacific Gas and Electric Company (PG&E) compressor station in Hinkley, California, in the western Mojave Desert 80 miles northeast of Los Angeles, California. In 2015, the extent of anthropogenic Cr(VI) in groundwater in Hinkley and Water Valleys...
Introduction to study area hydrogeology, chromium sources, site history, and purpose of study
John A. Izbicki, Krishangi D. Groover, David M. Miller, Whitney A. Seymour, John G. Warden, Laurence G. Miller
2023, Professional Paper 1885-A
Between 1952 and 1964, hexavalent chromium, Cr(VI), was released into groundwater from the Pacific Gas and Electric Company (PG&E) Hinkley compressor station in the Mojave Desert 80 miles (mi) northeast of Los Angeles, California. Remediation began in 1992, and in 2010, site cleanup was projected to require between 10 and...
Natural and anthropogenic (human-made) hexavalent chromium, Cr(VI), in groundwater near a mapped plume, Hinkley, California
John A. Izbicki
2023, Professional Paper 1885
Between 1952 and 1964, hexavalent chromium, Cr(VI), was released into groundwater from the Pacific Gas and Electric Company (PG&E) Hinkley compressor station in the Mojave Desert 80 miles (mi) northeast of Los Angeles, California. Remediation began in 1992, and in 2010, site cleanup was projected to require between 10...
Surface fault displacement models for strike-slip faults
Brian S. J. Chiou, Rui Chen, Kate Thomas, Christopher W. D. Milliner, Timothy E. Dawson, Mark D. Petersen
2023, Report GIRS 2022-07
Fault displacement models (FDMs) are an essential component of the probabilistic fault displacement hazard analyses (PFDHA), much like ground motion models in the probabilistic seismic hazard analyses for ground motion hazards. In this study, we develop several principal surface FDMs for strike-slip earthquakes. The model development is based on...
Management of vampire bats and rabies: Past, present, and future
Tonie E. Rocke, Daniel G. Streicker, Ariel Elizabeth Leon
2023, Book chapter, History of Rabies in the Americas: From the Pre-Columbian to the Present,
Rabies virus transmitted via the bite of common vampire bats (Desmodus rotundus) has surpassed canine-associated cases as the predominant cause of human rabies in Latin America. Cattle, the preferred prey of D. rotundus, suffer extensive mortality from vampire bat associated rabies, with annual financial losses estimated in the tens of millions...
Unzipping supercontinent Pangea: Geologic, potential field data, and buried structures, and a case for sequential Atlantic opening
Aaron G. Stubblefield, Robert D. Jr. Hatcher, J. Wright Horton, Jr., David L. Daniels
2023, Tectonophysics (856) 229842 (1-10 online)
Amalgamation of Pangea culminated with zippered N-to-S closing of the Theic ocean during the Alleghanian orogeny. Transpressional-rotational collision produced widespread dextral faulting throughout the eastern Appalachian hinterland, and thrust faulting in the western hinterland and foreland. The partially buried southern...
The concept of land bridge marshes in the Mississippi River Delta and implications for coastal restoration
John W. Day, Robert R. Twilley, Angelina Freeman, Brady Couvillion, Tracy Quirk, Navid H. Jafari, Giulio Mariotti, Rachael Hunter, Charles Norman, G. Paul Kemp, John R. White, Ehab Meselhe
2023, Nature Based Solutions (3)
Louisiana has high coastal wetland loss rates due to natural processes such as subsidence and anthropogenic activities such as construction of river levees and dams, pervasive alteration of surface hydrology by local industries such as oil and gas, and navigation. With...
Inland water greenhouse gas budgets for RECCAP2: 2. Regionalization and homogenization of estimates
Ronny Lauerwald, George H. Allen, Bridget Deemer, Shaoda Liu, Taylor Maavara, Peter Raymond, Lewis Alcott, David Bastviken, Adam Hastie, Meredith A. Holgerson, Matthew S. Johnson, Bernhard Lehner, Peirong Lin, Alessandra Marzadri, Lishan Ran, Hanqin Tian, Xiao Yang, Yuanzhi Yao, Pierre Regnier
2023, Global Biogeochemical Cycles (37)
Inland waters are important sources of the greenhouse gasses (GHGs) carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) to the atmosphere. In the framework of the 2nd phase of the REgional Carbon Cycle Assessment and Processes (RECCAP-2) initiative, we synthesize existing estimates of GHG emissions from streams, rivers, lakes and...
Multiple models for outbreak decision support in the face of uncertainty
Katriona Shea, Rebecca K. Borchering, William J M Probert, Emily Howerton, Tiffany L. Bogich, Shou-Li Li, Willem G. van Panhuis, Cecile Viboud, Ricardo Aguás, Artur A. Belov, Sanjana H. Bhargava, Sean M. Cavany, Joshua C. Chang, Cynthia Chen, Jinghui Chen, Shi Chen, YangQuan Chen, Lauren M. Childs, Carson C. Chow, Isabel Crooker, Sara Y. Del Valle, Guido España, Geoffrey Fairchild, Richard C. Gerkin, Timothy C. Germann, Quanquan Gu, Xiangyang Guan, Linhong Guo, Gregory R. Hart, Thomas J. Hladish, Nathaniel Hupert, Daniel Janies, Cliff C. Kerr, Daniel J. Klein, Eili Y. Klein, Gary Lin, Carrie Manore, Lauren A. Meyers, John E. Mittler, Kunpeng Mu, Rafael C. Nunez, Rachel J. Oidtman, Remy Pasco, Ana Pastore y Piontti, Rajib Paul, Carl A. B. Pearson, Dianela R. Perdomo, T. Alex Perkins, Kelly Pierce, Alexander N. Pillai, Rosalyn C. Rael, Katherine Rosenfeld, Chrysm W. Ross, Julie A. Spencer, Arlin B. Stoltzfus, Kok B. Toh, Shashaank Vattikuti, Alessandro Vespignani, Lingxiao Wang, Lisa J. White, X. Pan, Yupeng Yang, Osman N. Yogurtcu, Weitong Zhang, Yanting Zhao, Difan Zou, Matthew J. Ferrari, David Pannell, Michael J. Tildesley, J. Seiferth, Elyse Johnson, Matthew Biggerstaff, Michael A Johansson, Rachel B. Slayton, John Levander, Jeff Stazer, J. Kerr, Michael C. Runge
2023, PNAS (120)
Policymakers must make management decisions despite incomplete knowledge and conflicting model projections. Little guidance exists for the rapid, representative, and unbiased collection of policy-relevant scientific input from independent modeling teams. Integrating approaches from decision analysis, expert judgment, and model aggregation, we convened multiple modeling teams to evaluate COVID-19 reopening strategies...
Inland water greenhouse gas budgets for RECCAP2: 1. State-of-the-art of global scale assessments
Ronny Lauerwald, George H. Allen, Bridget Deemer, Shaoda Liu, Taylor Maavara, Peter Raymond, Lewis Alcott, David Bastviken, Adam Hastie, Meredith A. Holgerson, Matthew S. Johnson, Bernhard Lehner, Peirong Lin, Alessandra Marzadri, Lishan Ran, Hanqin Tian, Xiao Yang, Yuanzhi Yao, Pierre Regnier
2023, Global Biogeochemical Cycles (37)
Inland waters are important sources of the greenhouse gasses (GHGs) carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) to the atmosphere. In the framework of the 2nd phase of the REgional Carbon Cycle Assessment and Processes (RECCAP-2) initiative, we review the state of the art in estimating inland water GHG...
Groundwater prospecting using a multi-technique framework in the lower Casas Grandes Basin, Chihuahua, México
Alfredo Granados Olivas, Ezequiel Rascon-Mendoza, Francisco J. Gómez-Domínguez, Carlo I. Romero-Gameros, Andrew J. Robertson, Luis C. Bravo-Peña, Ali Mirchi, Ana C. Garcia-Vazquez, Alexander Fernald, John W. Hawley, Luis Alfonso Gandara-Ruiz, Luis C. Alatorre-Cejudo, Maryam Samimi, Felipe A. Vazquez-Galvez, Adan Pinales-Munguia, Oscar F. Ibañez-Hernandez, Josiah M. Heyman, Alex Mayer, William L. Hargrove
2023, Water (15)
Groundwater is a strategic resource for economic development, social justice, environmental sustainability, and water governance. The lower Casas Grandes River Basin, located in the state of Chihuahua, México, is in a semi-arid region with increasing groundwater demand and regional challenges such as drought and depletion of aquifers. Even though...
Near-field receiving-water monitoring of trace metals and a benthic community near the Palo Alto Regional Water Quality Control Plant in south San Francisco Bay, California—2020
Daniel J. Cain, Marie Noële Croteau, Janet K. Thompson, Francis Parchaso, A. Robin Stewart, Emily L. Zierdt Smith, Kelly H. Shrader, Le H. Kieu, Samuel N. Luoma
2023, Open-File Report 2023-1017
Trace-metal concentrations in sediment and in the clam Limecola petalum (World Register of Marine Species, 2020; formerly reported as Macoma balthica and M. petalum), clam reproductive activity, and benthic macroinvertebrate community structure were investigated in a mudflat 1 kilometer (km) south of the discharge of the Palo Alto Regional Water...
Distribution and abundance of Southwestern Willow Flycatchers (Empidonax traillii extimus) on the upper San Luis Rey River, San Diego County, California—2022 data summary
Scarlett L. Howell, Barbara E. Kus
2023, Data Report 1173
Executive SummaryWe surveyed for Southwestern Willow Flycatchers (Empidonax traillii extimus; flycatcher) along the upper San Luis Rey River near Lake Henshaw in Santa Ysabel, California, in 2022. Surveys were completed at four locations: three downstream from Lake Henshaw, where surveys occurred from 2015 to 2021 (Rey River Ranch [RRR], Cleveland...
Ambrosia beetles (Coleoptera: Curculionidae) can directly transmit the fungal pathogens responsible for Rapid ʻŌhiʻa Death
Kylle Roy, Kelly Jaenecke, Ellen Dunkle, Dan Mikros, Robert W. Peck
2023, Forest Pathology (53)
The ecologically and culturally vital tree species, ʻōhiʻa lehua (Metrosideros polymorpha), is threatened by the fungal pathogens Ceratocystis lukuohia and Ceratocystis huliohia, the causal agents of the disease complex called Rapid ʻŌhiʻa Death (ROD). Four invasive ambrosia beetle (Coleoptera: Curculionidae: Scolytinae) species in the Xyleborini tribe colonize ROD Ceratocystis-infested ‘ōhiʻa and produce inoculum through...
A novel assembly pipeline and functional annotations for targeted sequencing: A case study on the globally threatened Margaritiferidae (Bivalvia: Unionida)
André Gomes-dos-Santos, Elsa Froufe, John M. Pfeiffer, Nathan Johnson, Chase H. Smith, André M. Machado, L. Filipe C. Castro, Van Tu Do, Akimasa Hattori, Nicole Garrison, Nathan V. Whelan, Ivan N. Bolotov, Ilya V. Vikhrev, Alexander V. Kondakov, Mohamed Ghamizi, Vincent Prié, Arthur E. Bogan, Manuel Lopes Lima
2023, Molecular Ecology Resources (23) 1403-1422
The proliferation of genomic sequencing approaches has significantly impacted the field of phylogenetics. Target capture approaches provide a cost-effective, fast and easily applied strategy for phylogenetic inference of non-model organisms. However, several existing target capture processing pipelines are incapable of incorporating whole genome sequencing (WGS)....
