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The transition from melt accumulation to eruption initiation recorded by orthopyroxene Fe-Mg diffusion timescales in late Holocene rhyolites, South Sister volcano, Oregon Cascade Range The transition from melt accumulation to eruption initiation recorded by orthopyroxene Fe-Mg diffusion timescales in late Holocene rhyolites, South Sister volcano, Oregon Cascade Range
South Sister volcano, Oregon Cascade Range, USA, has repeatedly erupted rhyolite since ca. 40 ka. The youngest such eruptions are the ca. 2 ka Rock Mesa and Devils Chain rhyolites, erupted several hundred years apart from two multi-vent complexes separated by 3–6 km. Fe-Mg interdiffusion models of orthopyroxene rims from both rhyolites produce timescales up to several-thousand years, but
Authors
Nathan Lee Andersen, Annika E. Dechert, Dawn Catherine Sweeney Ruth, May (Mai) Sas, Julie Chouinard, Josef Dufek
Efficacy of oblique bubble screen deterrents on redirecting live eggs and larvae of grass carp (Ctenopharyngodon idella) at different developmental stages Efficacy of oblique bubble screen deterrents on redirecting live eggs and larvae of grass carp (Ctenopharyngodon idella) at different developmental stages
Invasive carp have severely damaged aquatic ecosystems in the USA, particularly in the Mississippi River Basin. Behavioral deterrents have been developed in the last few decades to control population expansion into new ecosystems. However, none of these deterrents are capable of controlling early-life stage carp, which have limited or no mobility during their drifting stage in rivers...
Authors
Vindhyawasini Prasad, Juan Martin Andrade Ramos, Cory Suski, P. Ryan Jackson, Amy E. George, Duane C. Chapman, Jesse Robert Fischer, Benjamin H. Stahlschmidt, Rafael O. Tinoco
Assessment of dragonfly and damselfly (Odonata) occupancy and habitat suitability at −12 Mile Slough, Glen Canyon National Recreation Area, Arizona Assessment of dragonfly and damselfly (Odonata) occupancy and habitat suitability at −12 Mile Slough, Glen Canyon National Recreation Area, Arizona
Management practices that enhance habitat complexity in dam tailwaters often aim to increase biodiversity and improve ecosystem health. However, in other instances, management practices may simplify habitat features to help minimize the establishment of invasive species. These tradeoffs are complex, particularly in the face of drought and warming water temperatures. In Glen Canyon...
Authors
Anya Metcalfe, Morgan Ford, Lawrence E. Stevens, Theodore Kennedy
Multi-scale geophysical mapping of the brine and bedrock surfaces along the Dolores River, Paradox Valley, Colorado, December 2023 Multi-scale geophysical mapping of the brine and bedrock surfaces along the Dolores River, Paradox Valley, Colorado, December 2023
Total dissolved solids derived from salt dome–sourced brine in the underlying alluvial aquifer substantially increase with distance in the reach of the Dolores River that passes through Paradox Valley in southwestern Colorado. The area has been the site of salinity control operations since the 1990s to reduce salt loading to the downstream Colorado River. Previous airborne and ground...
Authors
Neil Terry, M. Alisa Mast, Andrea L. Creighton, Joel William Homan, Connor P. Newman, Suzanne S. Paschke
Using gridded seismicity to forecast the long-term spatial distribution of earthquakes for the 2025 Puerto Rico and U.S. Virgin Islands National Seismic Hazard Model Using gridded seismicity to forecast the long-term spatial distribution of earthquakes for the 2025 Puerto Rico and U.S. Virgin Islands National Seismic Hazard Model
Gridded (or background) seismicity models are a critical component of probabilistic seismic hazard assessments, accounting for off‐fault and smaller‐magnitude earthquakes. They are typically developed by declustering and spatially smoothing an earthquake catalog to estimate a long‐term seismicity rate that can be used to forecast future earthquakes. Here, we present new gridded...
Authors
Andrea L. Llenos, Andrew J. Michael, Kirstie Lafon Haynie, Allison Shumway, Julie A. Herrick
A time-space model of graphite mineral systems A time-space model of graphite mineral systems
Increasing demand for graphite in energy storage systems warrants review of graphite ore genesis in a mineral systems framework. Orogenic graphite encompasses the metamorphic and orogenic mineral systems that produce flake graphite and hydrothermal vein (lump and chip) graphite deposits, respectively. A common feature of orogenic graphite deposits is an association with upper amphibolite...
Authors
George N.D. Case
High frequency and region-scale simulations of large (Mw7+) earthquakes on the southern Whidbey Island fault, Washington, USA High frequency and region-scale simulations of large (Mw7+) earthquakes on the southern Whidbey Island fault, Washington, USA
We simulate ground shaking in western Washington State from hypothetical Mw7.0–7.5 earthquakes on the southern Whidbey Island fault (SWIF). Ground motions are modeled considering kinematic source distributions on a complex fault plane, a 3D seismic velocity model, and region‐specific soil velocity models. We run simulations with varying model resolutions, including regional‐scale...
Authors
Ian P. Stone, Erin A. Wirth, Alex R. Grant, Arthur D. Frankel
Offsetting the noise: A framework for applying phenological offset corrections in remotely sensed burn severity assessments Offsetting the noise: A framework for applying phenological offset corrections in remotely sensed burn severity assessments
Background Phenological correction of pre- and post-fire imagery is used to improve remotely sensed burn severity evaluations. Unburned offset values standardize greenness between image pairs; however, efficacy across diverse scenarios remains underexplored.Aims We evaluated the impact of phenological offset correction methods to support analyst decision-making across fire-prone...
Authors
Casey Elizabeth Menick, Melanie K. Vanderhoof, Joshua J. Picotte, Alicia L. Reiner, Robert A. Chastain
Similar population dynamics before and after a chytridiomycosis outbreak in a tropical riparian amphibian species Similar population dynamics before and after a chytridiomycosis outbreak in a tropical riparian amphibian species
Emerging infectious diseases can cause rapid, widespread host mortality, and the lack of demographic data before and after pathogen emergence complicates understanding mechanisms of host persistence. This challenge is further compounded by environmental conditions that influence host behavior, while driving pathogen growth and virulence. These interactions create complex disease outcomes...
Authors
Graziella Vittoria DiRenzo, Rebecca McCaffery, Ana V. Longo, Kelly R. Zamudio, Karen R. Lips
Invasive wild pig movement and space use in a mixed-use forest landscape, South Carolina Invasive wild pig movement and space use in a mixed-use forest landscape, South Carolina
Invasive wild pigs (Sus scrofa) pose considerable ecological and economic challenges across their introduced range, and understanding their spatial ecology is critical for management. This research and accompanying dataset represents adult wild pig movement in South Carolina, United States based on 16 individuals collared in 2023-2024. Using hourly GPS collar data for 6 males and 5...
Authors
Erin K. Buchholtz, Andrew Jamison, Greg Yarrow
Status report on the Long-Term Experimental and Management Plan (LTEMP) Metrics for the Glen Canyon Dam adaptive management program Status report on the Long-Term Experimental and Management Plan (LTEMP) Metrics for the Glen Canyon Dam adaptive management program
No abstract available.
Authors
Helen C. Fairley, Gregory Mark Anderson, Andrew Alan Schultz, Joel B. Sankey, Joshua Caster, Lauren Lynn Tango, Bridget Deemer, Theodore Kennedy, Anya Metcalfe, Emily C. Palmquist, Maria C. Dzul, Kimberly L. Dibble, David Ward, David L. Rogowski, Emily C. Omana Smith, Jeffrey Arnold, Brian D. Healy, Charles Yackulic, Lucas Bair, David J. Topping, Paul Grams, Katherine Anne Chapman, Robert B. Tusso, Dale Fonken, Josh Korman, Lindsay Erika Hansen, Benjamin John Miller, John M. Fennell, Drew Elliot Eppehimer, Claudia James Dimartini, Nathaniel D. Bransky
Gas chemistry and isotope data for volcano monitoring at the Lassen Volcanic Center, Lassen Volcanic National Park Gas chemistry and isotope data for volcano monitoring at the Lassen Volcanic Center, Lassen Volcanic National Park
This report presents chemical and isotopic compositions of volcanic gases collected from thermal areas within Lassen Volcanic National Park in northern California from 1974 through 2019. As the southernmost volcano in the Cascade Range and designated a very-high-threat volcano by the U.S. Geological Survey, the Lassen Volcanic Center (LVC) requires consistent monitoring to assess...
Authors
Deborah Bergfeld, Jennifer L. Lewicki, Sara Peek, Andrew Hunt