Distribution, abundance, breeding activities, and restoration efforts for the Southwestern Willow Flycatcher at Marine Corps Base Camp Pendleton, California—2025 Annual Report
Suellen Lynn, Scarlett L. Howell, Barbara E. Kus
2026, Open-File Report 2026-1016
Executive Summary The purpose of this report is to provide the Marine Corps with an annual summary of the distribution, abundance, and breeding activity of the endangered Southwestern Willow Flycatcher (Empidonax traillii extimus; flycatcher) and to present results of management actions implemented to attract flycatchers and enhance flycatcher habitat at Marine...
Continuous stream discharge, salinity, and associated data collected in the lower St. Johns River and its tributaries, Florida, 2023
Jennifer N. Carson, Matthew T. Benacquisto
2026, Open-File Report 2026-1012
The U.S. Army Corps of Engineers, Jacksonville District, deepened the St. Johns River channel in Jacksonville, Florida, to accommodate larger, fully loaded cargo vessels. The U.S. Geological Survey (USGS), in cooperation with the U.S. Army Corps of Engineers, monitored stage, discharge, and (or) water temperature and salinity at 26 continuous...
Multi-proxy thermal history of basin heating during Cordilleran orogenesis in the Magallanes-Austral retroarc foreland basin, Patagonian Andes
Rebecca A. VanderLeest, Julie C. Fosdick, Theresa Maude Schwartz, E.G. Hyland, M. Mastalerz
2026, Basin Research (38)
Resolving thermal histories in sedimentary basins is crucial for interpreting orogenic growth, basin burial, and tectonic processes during Cordilleran orogenesis. In the Magallanes–Austral Basin, Patagonian Andes, we integrate new (U-Th)/He thermochronology, vitrinite reflectance (%Ro), calcite-cement clumped isotope data and thermal history modelling to resolve the origin of the regionally extensive...
Spawning habitat suitability models for Lake Erie cisco (Coregonus artedi) during the historical period of pre- and post-population declines 1877–1957
Katelyn King, Cory Brant, Arthur Cooper, Gust Annis, Matthew Herbert, Karen M Alofs
2026, Journal of Great Lakes Research
Coregonine fishes play a key role in the food webs and fisheries of the Laurentian Great Lakes and are a major focus of basin-wide conservation efforts. In Lake Erie, management goals prioritize rebuilding spawning populations of cisco (Coregonus artedi). However, the historical distribution of cisco spawning habitat and the environmental...
Baseflow and snowmelt sustained streamflow in the Upper Colorado River Basin, 1986-2020
Olivia L. Miller, Matthew P. Miller, Patrick C. Longley, Noah M. Schmadel, Daniel R. Wise, Morgan C. McDonnell, Jay R. Alder
2026, Environmental Research: Water (2)
The Upper Colorado River Basin (UCRB) faces substantial water availability limitations. Although most streamflow originates as snowmelt, the partitioning of snowmelt between surface runoff and groundwater recharge and subsequent groundwater discharge to streams is highly uncertain. On average, over half of the streamflow in the UCRB is estimated to originate...
VegET evapotranspiration for Africa: Continental-scale simulation, multi-product evaluation, and drought assessment
Komlavi Akpoti, Naga Manohar Velpuri, Mansoor Leh, Stefanie Kagone, Kirubel Mekonnen, Afua Owusu, Mulugeta Tadesse, Paranamana T. Prabhath, Lahiru Madushanka, Tharindu Perera, Gabriel Edwin Lee Parrish, Vinay Nangia, Souleymane Sy, Jan Bliefernicht, Samuel Guug, Abdulkarim Seid, Gabriel B. Senay
Gabriel B. Senay, editor(s)
2026, Journal of Hydrology: Regional Studies (66)
Study regionContinental Africa, encompassing diverse climatic zones—tropical, arid, and temperate—and spanning major transboundary river basins such as the Nile, Niger, Congo, Volta, and Zambezi River Basins. The region exhibits pronounced hydroclimatic gradients and heterogeneous land use systems ranging from rainfed croplands and rangelands...
Evaluation of stream capture related to groundwater pumping, middle Humboldt River Basin, Nevada
Kyle W. Davis, William G. Eldridge, Kip K. Allander, David E. Prudic, Murphy A. Gardner, Michael T. Pavelko, Cara A. Nadler
2026, Professional Paper 1906
Historical, future, and potential stream capture from groundwater pumping in the middle Humboldt River Basin (MHRB), Nevada, is estimated using a calibrated numerical groundwater flow model. The model was developed to estimate (1) stream capture, which is the change in flux between the groundwater system and the Humboldt River and...
Predictable seismic cycles result from structural rupture barriers on oceanic transform faults
Jianhua Gong, Wenyuan Fan, Jeffrey J. McGuire, Mark D. Behn, Jessica M. Warren, Emily Roland, M. S. Boettcher, J. A. Collins, Y. Liu, C. R. German
2026, Science (392) 718-723
Earthquakes of magnitude (M) >5.5 on oceanic transform faults (OTFs) repeatedly rupture the same locked patches, sometimes quasiperiodically. These patches are separated by “barriers” that halt earthquake propagation and slip mostly aseismically. However, the physical processes governing this systematic behavior remain unclear. We analyzed two barriers along the Gofar transform...
Syn-magmatic subsidence during the early stages of continental rifting in the Mesoproterozoic—A reanalysis of legacy data for the Midcontinent Rift, western Lake Superior
V. J. Grauch, Laurel G. Woodruff, Samuel J. Heller, Esther K. Stewart
2026, Geosphere
The Midcontinent Rift system (ca. 1.1 Ga) is a 2000-km-long series of elongated volcanic and sedimentary troughs and associated intrusive centers exposed chiefly in the Lake Superior region of North America. The rift system represents a long history of intense magmatism and subsequent sedimentation that was arrested by far-field tectonic...
Practical guidance for engaging end-users and experts in developing scientific tools
Kaylin R. Clements, James J. English, Emily J. Wilkins, Megan A. Moore, Rudy Schuster
2026, Scientific Investigations Report 2026-5137
This report provides actionable guidance for scientists developing scientific tools that inform on-the-ground decision making. Scientific tools, in the context of this report, are technology or protocols that help practitioners collect and analyze their own data, and information products and web tools that practitioners could use to inform decisions. Engaging...
Timing, uncertainty, and opportunity cost: Lessons for ecosystem modification on the Colorado River
Pierce Donovan, Lucas Bair, Matthew N. Reimer, Michael R. Springborn, Charles B. Yackulic
2026, Journal of Environmental Economics and Management (139)
While conservation goals have long been pursued through traditional species-augmenting actions, a broader set of episodic ecosystem modification (EEM) actions, such as hydropower dam releases, prescribed fire, and beach nourishment, is garnering attention. EEM actions face several implementation challenges stemming from high opportunity costs, delayed effect mechanisms, reliance on monitoring...
Integrating mark-recapture, catch, and expert habitat assessments to quantify recent increases in humpback chub abundance over a 200 km long river segment of the Colorado River in western Grand Canyon
Maria C. Dzul, David R. Van Haverbeke, Kirk Young, Charles B. Yackulic, Pilar Rinker, Michael D. Yard
2026, Canadian Journal of Fisheries and Aquatic Sciences (83) 1-13
Humpback chub, Gila cypha, were historically distributed throughout large portions of the Colorado River basin and were federally listed in 1967. In the Grand Canyon segment of the Colorado River, located below Glen Canyon Dam, chub abundances continued to decline through the early 2000s. Recently, catch has increased substantially, especially in the...
Storm surge barriers reduce seaward sediment supply to lagoonal estuaries
David K. Ralston, Philip M. Orton, John C. Warner, Shima Kasaei
2026, Earth's Future (14)
Numerical simulations with realistic forcing of fixed infrastructure for a proposed storm surge barrier for a lagoonal estuary, Jamaica Bay (New York, USA), are analyzed during typical forcing conditions to assess alterations to flow and sediment transport with the barrier open. Lagoonal estuaries are shallow and have modest watershed freshwater...
Salinas Valley integrated hydrologic and reservoir operations models, Monterey and San Luis Obispo Counties, California
Wesley R. Henson, Randy Hanson, Scott Boyce, Joseph Hevesi, Marisa M. Earll, Deidre M. Herbert, Elizabeth R. Jachens
2026, Scientific Investigations Report 2026-5005
The area surrounding the Salinas Valley groundwater basin in Monterey and San Luis Obispo Counties of California is a highly productive agricultural area, contributes substantially to the local economy, and provides a substantial portion of vegetables and other agricultural commodities to the Nation. This region of California provides about half...
Toxicity of synergized permethrin residues in cattle dung to two temperate dung beetle species after application of common livestock pour-on treatment
Michael C. Cavallaro, Michelle L. Hladik, Rodrigo Soares, Mikaela Anderson, W. Wyatt Hoback
2026, Agriculture, Ecosystems, and Environment (408)
Essential to pasture health, dung beetles (Coleoptera: Scarabaeidae) provide key ecosystem services across natural and managed rangeland habitats. Insecticide residues in livestock dung can negatively impact dung beetle populations, and synergized pyrethroid products are commonly used to combat resistant pest fly populations. Here, permethrin residues were measured by GC-MS/MS in...
Top Elevation of Glacial Till and Thickness of the Big Sioux Aquifer Delineated From Electrical Resistivity Tomography Surveys Near Sioux Falls, South Dakota, 2022 and 2025
Colton J. Medler, Todd M. Anderson
2026, Scientific Investigations Report 2026-5023
The City of Sioux Falls, South Dakota, requested the U.S. Geological Survey perform electrical resistivity surveys on three parcels of land north of the city. Electrical resistivity data were collected along a total of 22 transects during March 14–18, 2022, and November 17–21, 2025. Results from electrical resistivity surveys were...
Calcareous nannofossil assemblage changes in the Surprise Hill core and their implications for floral response to the Paleocene-Eocene Thermal Maximum across the Salisbury Embayment of Virginia, USA
Masayuki Utsunomiya, Jean Self-Trail, D. Clay Kelly, Xiaodong Zhang, Kristina Frank Gardner, James C. Zachos
2026, Marine Micropaleontology (204)
We present Paleocene-Eocene calcareous nannofossil biostratigraphy and paleoecology for the Surprise Hill core, U.S. Atlantic Coastal Plain, Virginia. Calcareous nannofossil datums ranging from Zone NP3 to NP14 were identified. The Danian-aged Brightseat Formation rests unconformably atop the Lower Cretaceous Potomac Group at 211.4 m and disconformably underlies the Aquia Formation at...
Watershed Continuum Monitoring Approach: Combining multiple water quality patterns along stream and river flowpaths to track sources, pathways, and processing of pollutants
Sujay Kaushal, Ashley Mon, Stanley Grant, Paul M. Mayer, Aaron J. Porter, Andrew J. Sekellick, Jason Hamilton Chase, Shantanu Bhide, John D. Jastram, Tammy Newcomer-Johnson, Sydney A. Shelton, Alexis M. Yaculak, Joseph T. Malin, Carly Marcella Maas, Nicholas Salanitri, Daniel J. Silberstein, Steven P. Hohman, Ashley B. Dann, Weston M Slaughter, Megan A. Rippy, Ahmed Monofy, Ruth R. Shatkay, Jenna E. Reimer, Madeleine Seppi, Randi Noel, Julianna Mussa, Bennett Kellmayer, Gwendolyn Sivirichi, Melissa Grese, Walter L.M. Boger, Jeffrey G. Chanat, Shuiwang Duan, Kenneth T. Belt
2026, Ecological Engineering (229)
There is a growing need to improve and expand water quality monitoring approaches to more accurately track the sources, fate, and transport of multiple chemicals and pollutants holistically and quantify the effects of best management practices (BMPs) at the watershed scale. An overarching question raised by scientists, environmental managers, and...
Effects of wildfire on soil hydraulic properties in the western Oregon Cascades
Cedric Pimont, Evan A. Thaler, Brian A. Ebel, Kevin D. Bladon
2026, JGR Biogeosciences (131)
Wildfires can substantially impact the hydrology of forested watersheds, increasing the risk of hydrologic hazards such as flash floods and debris flows. Soil hydraulic properties related to infiltration are a key control in determining the timing and magnitude of these hydrogeomorphic events. In our study, we collected 445 soil cores...
Hydrogeologic framework and conceptual groundwater-flow model of the panhandle and northwest parts of the High Plains (Ogallala) aquifer in Oklahoma, 1998–2022
Amy S. Morris, Colin A. Baciocco, Isaac A. Dale, Chloe Codner, Ethan A. Kirby, Grant M. Graves, Derrick L. Wagner, Eric G. Fiorentino, Alan LePera, Jon E. Sanford, Lara Joy
2026, Scientific Investigations Report 2026-5009
This study was conducted by the U.S. Geological Survey, in cooperation with the Oklahoma Water Resources Board, to update the hydrogeologic framework and conceptual flow model for the panhandle and northwest parts of the High Plains (Ogallala) aquifer in Oklahoma, which together compose the Ogallala aquifer focus area. The study...
Hazard potential of compound flooding from rainfall, storm surge, and groundwater in coastal New York and Connecticut
Robin L. Glas, Liv M. Herdman, Salme Ellen Cook, Archi Howlader, Kristina Kirkyla Masterson
2026, Natural Hazards and Earth System Sciences (26) 2169-2188
Compound flood events, the co-occurrence of multiple flood drivers, can result in flood hazard potential exceeding that of any single driver alone. To evaluate compound flooding in a semi-urbanized coastal area, historical records dating back to 1970 are used to study the co-occurrences of high precipitation, storm surge, and shallow...
Quantitative mineral resource assessment of lithium pegmatite deposits in the southern Appalachian orogen
Joshua Mark Rosera, Kelsey Elizabeth Crocker, Laura Pianowski, Jacob T. Murchek, Ashton M. Wiens, Margaret M. Sanders, Lucas Leonidus Evart, Jacob DeAngelo, Graham W. Lederer, Joshua A. Coyan
2026, Natural Resources Research
The first quantitative mineral resource assessment for undiscovered lithium pegmatite deposits in the southern Appalachian region of the United States was conducted. Permissive tracts for lithium pegmatite deposits were delineated by integrating lithological, tectonic, geochemical, geophysical and mineral occurrence data. Lithium pegmatite prospectivity of the tracts was ranked with simplified...
Not so fatal attraction: Captive female Burmese Python lures do not improve wild python detection
Alex D. Potash, Maggie Jones, Michael Kirkland, Jenna Cole, Kristen Hart, Robert A. McCleery
2026, Southeastern Naturalist (25) 191-200
The ongoing invasion of Python bivittatus (Burmese Python; henceforth, Python) across the Greater Everglades Ecosystem (GEE) has led to near total collapse of the affected mammal community over the past few decades. Management efforts to eliminate Pythons and control their spread have been hampered by the Python's low detectability, which may be...
Accounting for emigration reveals high survival and bimodal size at departure from a loggerhead sea turtle (Caretta caretta) foraging area
Caroline M. Blommel, Margaret Lamont, William L. Kendall
2026, Marine Biology (173)
The life history of hard-shelled sea turtles includes several ontogenetic shifts in habitat use and these complex permanent emigration patterns can impact estimates of stage-specific population rates, including survival. We developed several multistate mark recapture models to estimate survival of adult and juvenile loggerhead turtles from a coastal bay in...
Tropicalization of the temperate zone: Spatiotemporal variability of winter warming and declining freeze days across the United States
Vincent M. Brown, Derek T. Thompson, Buren B. DeFee, Michael Osland, Barry D. Keim
2026, International Journal of Climatology
We investigate changes in cool-season and winter daily minimum (Tmin) and maximum (Tmax) temperatures, and the occurrence of freeze days, from 1952 to 2024 across the conterminous United States (CONUS). Emphasis is placed on the tropical-temperate transition zone (TTTz) in the southeastern CONUS. During winter, ~70% of the land area...
