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Assessment of undiscovered conventional oil and gas resources of Oman, 2023 Assessment of undiscovered conventional oil and gas resources of Oman, 2023
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean conventional resources of 1.2 billion barrels of oil and 6.4 trillion cubic feet of gas in Oman.
Authors
Christopher J. Schenk, Tracey J. Mercier, Phuong A. Le, Andrea D. Cicero, Ronald M. Drake, Sarah E. Gelman, Jane S. Hearon, Benjamin G. Johnson, Jenny H. Lagesse, Heidi M. Leathers-Miller, Kira K. Timm
Hydrological whiplash: Highlighting the need for better understanding and quantification of sub-seasonal hydrological extreme transitions Hydrological whiplash: Highlighting the need for better understanding and quantification of sub-seasonal hydrological extreme transitions
In this commentary, we aim to (1) describe ways that hydrological intensification and hydrological whiplash (sub-seasonal transitions between hydrological extremes) may impact water management decision-making, (2) introduce the complexities of identifying and quantifying hydrological extreme transitions, (3) discuss the processes controlling hydrological transitions and trends in...
Authors
John C. Hammond, Bailey Anderson, Caelan Simeone, Manuela Brunner, Eduardo Munoz-Castro, Stacey A. Archfield, Eugene Magee, Rachael Armitage
A novel method for estimating pathogen presence, prevalence, load, and dynamics at multiple scales A novel method for estimating pathogen presence, prevalence, load, and dynamics at multiple scales
The use of quantitative real-time PCR (qPCR) to monitor pathogens is common; however, quantitative frameworks that consider the observation process, dynamics in pathogen presence, and pathogen load are lacking. This can be problematic in the early stages of disease progression, where low level detections may be treated as ‘inconclusive’ and excluded from analyses. Alternatively, a...
Authors
John F. Gridder, Bradley James Udell, Brian E. Reichert, Jeffery T. Foster, William Louis Kendall, Tina L. Cheng, Winifred F. Frick
A comprehensive freshwater mussel database for the Duck River Drainage, Tennessee A comprehensive freshwater mussel database for the Duck River Drainage, Tennessee
We have developed a comprehensive database for freshwater mussels for the Duck River drainage in Tennessee, including its largest tributary, the Buffalo River. This database is intended to serve as an expandable template that could be applied statewide. The Duck River is one of the most biologically diverse rivers in the world, with historically over 70 mussel species, and it has been...
Authors
Kristen Irwin Womble, Amanda E. Rosenberger
Specific conductance and water type as a proxy model for salinity and total dissolved solids measurements in the Upper Colorado River Basin Specific conductance and water type as a proxy model for salinity and total dissolved solids measurements in the Upper Colorado River Basin
Salinity levels in streams and tributaries of the Colorado River Basin have been a major concern for the United States and Mexico for over 50 years as the water is used by millions of people for domestic and industrial purposes. Recently, the United States Geological Survey expanded stream monitoring networks including the number of sites where continuous (15-min) specific conductance is...
Authors
R. Blaine McCleskey, Charles A. Cravotta, Matthew P. Miller, Tanner William Chapin, Fred D. Tillman, Gabrielle L. Keith
Spatial variation in landlocked Atlantic Salmon smolt survival associated with dam passage, avian predation, and stocking location Spatial variation in landlocked Atlantic Salmon smolt survival associated with dam passage, avian predation, and stocking location
Objective We evaluated survival differences between upstream and downstream stocking for landlocked Atlantic Salmon Salmo salar smolts in a tributary to Lake Champlain.Methods We radio-tagged smolts and stocked them concurrently with 22,000 smolts at two release sites in 2 years. The downstream location (DS, river kilometer 16, no dam passage) was a historically used site in a dam...
Authors
Kurt C. Heim, William R. Ardren, Jonah L. Withers, Zachery Eisenhauer, Matthew A. Mensinger, Theodore Castro-Santos
Latitudinal gradients of snow contamination in the Rocky Mountains associated with anthropogenic sources Latitudinal gradients of snow contamination in the Rocky Mountains associated with anthropogenic sources
Seasonal snow is an important source of drinking water and recreation, and for agriculture in the Rocky Mountain region. Monitoring snow-water quality can inform on the effects to the albedo and energy balance of the snowpack, and the sources of natural and anthropogenic aerosol and gases. This study analyzed metals in the seasonal snowpack from water year (WY) 2018 for 49 sites. Calcium
Authors
Monica Arienzo, Kelly Gleason, Graham A. Sexstone, Mae Sexauer Gustin, Melissa Schwan, Nicole Choma, Sarrah Dunham-Cheatham, Joseph R. McConnell, Peter Weisberg, Adam Csank
Deterministic physics-based earthquake sequence simulators match empirical ground-motion models and enable extrapolation to data poor regimes: Application to multifault multimechanism ruptures Deterministic physics-based earthquake sequence simulators match empirical ground-motion models and enable extrapolation to data poor regimes: Application to multifault multimechanism ruptures
We use the deterministic earthquake simulator RSQSim to generate complex sequences of ruptures on fault systems used for hazard assessment. We show that the source motions combined with a wave propagation code create surface ground motions that fall within the range of epistemic uncertainties for the Next Generation Attenuation‐West2 set of empirical models. We show the model is well...
Authors
Bruce E. Shaw, Kevin Ross Milner, Christine A Goulet
Effects of invasive American bullfrogs and their removal on Northwestern pond turtles Effects of invasive American bullfrogs and their removal on Northwestern pond turtles
The American bullfrog (Rana catesbeiana) is an invasive species globally significant for its role as a generalist predator in freshwater systems. Native turtles are among the species eaten by bullfrogs, and turtle populations are slow to recover from this impact. We examined the effects of bullfrogs and their removal on Northwestern pond turtles (Actinemys marmorata) at four sites in...
Authors
Sidney M. Woodruff, Robert L. Grasso, Brian J. Halstead, Brian D. Todd
Geographic determination of Pinus ponderosa using DART TOFMS, ICP-MS, and LIBS handheld analyzer Geographic determination of Pinus ponderosa using DART TOFMS, ICP-MS, and LIBS handheld analyzer
Due to legal requirements on international imports, it is important for law enforcement and regulatory agencies to identify the geographical provenance of timber. Current methods for geographic identification utilize data generated by direct analysis in real time time-of-flight mass spectrometry (DART TOFMS), genetics, and isotope-ratio mass spectrometry (IRMS), but identification...
Authors
Erin R. Price, Kierra R. Cano, Caelin P. Celani, Helder V. Carneiro, Karl S. Booksh, James A. Jordan, Pamela J. McClure, Megahn H. Pinedo, Michael E. Ketterer, Kent M. Elliott, Tyler B. Coplen, Edgard O. Espinoza
United States Register of Introduced and Invasive Species United States Register of Introduced and Invasive Species
The pervasive and insidious threat of invasive species costs the United States more than $120 billion, annually. An invasive species is an organism that is not native to a locality and causes (or is likely to cause) harm. An introduced species is one that is nonnative to a locality and occurs there because of human activities or their consequences, including the species’ intentional or
Authors
Annie Simpson, Mark T. Wiltermuth, Mireya Dorado
Blue carbon stocks along the Pacific Coast of North America are mainly driven by local rather than regional factors Blue carbon stocks along the Pacific Coast of North America are mainly driven by local rather than regional factors
Coastal wetlands, including seagrass meadows, emergent marshes, mangroves, and temperate tidal swamps, can efficiently sequester and store large quantities of sediment organic carbon (SOC). However, SOC stocks may vary by ecosystem type and along environmental or climate gradients at different scales. Quantifying such variability is needed to improve blue carbon accounting, conservation...
Authors
Christopher N. Janousek, Johannes Krause, Judith Z. Drexler, Kevin J. Buffington, Katrina L. Poppe, Erin K. Peck, Fernanda Adame, Elizabeth Watson, James Holmquist, Scott D. Bridgham, Scott F. Jones, Melissa Ward, Cheryl A. Brown, Lisa Beers, Matthew T. Costa, Heida L. Diefenderfer, Amy B. Borde, Lindsey Sheehan, John M Rybczyk, Carolyn Prentice, Andrew Gray, Alejandro Hinojosa-Corona, Ana Carolina Ruiz-Fernandez, Joan-Albert Sanchez-Cabeza, Karen E. Kohfeld, Paula Ezcurra, Jonathan Ochoa-Gomez, Karen M. Thorne, Marlow G. Pellatt, Aurora M. Ricart, Amanda M. Nahlik, Laura S. Brophy, Richard F. Ambrose, Mira Lutz, Craig Cornu, Steve Crooks, Lisamarie Windham-Myers, Margot Hessing-Lewis, Fred Short, Stephen Chastain, Trevor Williams, Tristan Douglas, Elizabeth Fard, Lauren N. Brown, Michelle F. Goman