Python Hyperspectral Analysis Tool (PyHAT) user guide
Ryan B. Anderson, Itiya P. Aneece, Travis S.J. Gabriel
2025, Open-File Report 2025-1038
This report is a user guide for the 0.1.2 release of the Python Hyperspectral Analysis Tool (PyHAT) and its graphical user interface (GUI). The GUI is intended to provide an intuitive front end to allow users to apply sophisticated preprocessing and analysis methods to spectroscopic data. Though the PyHAT package...
Geologic framework and hydrostratigraphy of the Edwards and Trinity aquifers within Hays County, Texas
Allan K. Clark, Robert R. Morris, Alexis P. Lamberts
2025, Scientific Investigations Map 3540
During 2023–24, the U.S. Geological Survey, in cooperation with the Edwards Aquifer Authority, revised a previous publication of the geologic framework and hydrostratigraphy of the Edwards and Trinity aquifers that was completed during 2018 within Hays County, Texas. The purpose of this report is to present the updated geologic framework...
Revised marine bird collision and displacement vulnerability index for U.S. Pacific Outer Continental Shelf offshore wind energy development
Emma C. Kelsey, Jonathan J. Felis, David M. Pereksta, Josh Adams
2025, Data Report 1214
The installation of offshore wind energy infrastructure (OWEI) at sea may affect marine birds by increasing the risk of mortality from collision with OWEI (Collision Vulnerability) and causing disturbance and displacement from important habitats (Displacement Vulnerability). In 2017, we published the first comprehensive database quantifying marine bird Collision Vulnerability and...
Collaborative drought science planning in the Colorado River Basin
Patrick J. Anderson, Jeanne E. Godaire, Daniel K. Jones, William J. Andrews, Alicia A. Torregrosa, Meghan T. Bell, JoAnn M. Holloway, Molly A. Blakowski, Joseph A. Hevesi, Sharon L. Qi
2025, Open-File Report 2025-1041
The U.S. Geological Survey (USGS) is using collaborative, interdisciplinary planning to develop data and tools needed to optimize the management of water resources and land use by resource management agencies during an ongoing, multidecadal drought in the Colorado River Basin. The USGS Actionable and Strategic Integrated Science and Technology team...
Gravity and magnetic surveys of the Skaergaard intrusion, East Greenland
Mark E. Gettings
2025, Open-File Report 2025-1030
Aeromagnetic and gravity surveys of the Skaergaard intrusion in East Greenland were carried out in July–August 1971 as part of a grant to the University of Oregon Center for Volcanology to refine the models of crystallization and differentiation of the intrusion, specifically to test whether the intrusion is underlain by...
Development of PCR blocking primers enabling DNA metabarcoding analysis of dietary composition in hematophagous sea lamprey
Conor O'Kane, Nicholas S. Johnson, Kim T. Scribner, Jeannette Kanefsky, Weiming Li, John D. Robinson
2025, Ecology and Evolution (15)
Conventional dietary assessments are challenging in hematophagous species, particularly in sea lamprey (Petromyzon marinus). However, recent technological developments and molecular approaches have provided an attractive alternative through the use of DNA metabarcoding. While DNA metabarcoding has been used for dietary analyses in numerous species, including lampreys, applications of universal primers...
Assessment of undiscovered conventional oil and gas resources in Mexico, Belize, and Guatemala, 2024
Christopher J. Schenk, Tracey J. Mercier, Phuong A. Le, Andrea D. Cicero, Ronald M. Drake II, Sarah E. Gelman, Jane S. Hearon, Benjamin G. Johnson, Jenny H. Lagesse, Heidi M. Leathers-Miller, Kira K. Timm
2025, Fact Sheet 2025-3040
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean conventional resources of 14.6 billion barrels of oil and 83.7 trillion cubic feet of gas in Mexico, Belize, and Guatemala. ...
Improved prediction of postfire debris flows through rainfall anomaly maps
David B. Cavagnaro, Scott W. McCoy, Matthew A. Thomas, Jaime Kostelnik, Donald N. Lindsay
2025, Geophysical Research Letters (52)
Predicting where runoff-generated debris flows might occur during rainfall on steep, recently burned terrain is challenging. Studies of mass-movement processes in unburned areas indicate that event locations are well-predicted by rainfall anomaly, R*, in which peak observed rainfall is normalized by local rainfall climatology. Here, we use remote and field methods...
Potomac Tributary Summary: A summary of trends in tidal water quality and associated factors, 1985 - 2022
Breck Maura Sullivan, Kaylyn Gootman, Alex Gunnerson, Sarah Betts, Gabriel Duran, Cindy Johnson, Christopher A. Mason, Elgin Perry, Gopal Bhatt, Jennifer L. Keisman, James S. Webber, Jon Harcum, Michael Lane, Olivia Devereux, Qian Zhang, Rebecca Murphy, Renee Karrh, Thomas Butler, Zhaoying Wei
2025, Report
The Potomac Tributary Summary outlines change over time for a suite of monitored tidal water quality parameters and associated potential drivers of those trends for the period of 1985 to 2022, and provides a brief description of the current state of knowledge explaining these observed changes. Water quality parameters described...
Tracking status and trends in seven key indicators of river and stream condition in the Chesapeake Bay watershed
Lindsey J. Boyle, Samuel H. Austin, Matthew J. Cashman, Zachary J. Clifton, John W. Clune, James E. Colgin, Kaitlyn E.M. Elliott, Rosemary M. Fanelli, Ellie P. Foss, Nathaniel P. Hitt, Elizabeth A. Hittle, Coral M. Howe, Emily H. Majcher, Kelly O. Maloney, Christopher A. Mason, Marina J. Metes, Douglas L. Moyer, Trevor P. Needham, Karli M. Rogers, Joshua J. Thompson, Guoxiang Yang, Tammy M. Zimmerman
2025, Scientific Investigations Report 2025-5072
Freshwater streams and rivers are recognized as vital habitats within the Chesapeake Bay watershed, which has been undergoing extensive restoration efforts for more than 30 years. Resource managers need to understand stream and river condition and how these conditions are changing over time to determine whether regional long-term restoration and...
Landscape changes elevate the risk of avian influenza virus diversification and emergence in the East Asian–Australasian Flyway
Shenglai Yin, Chenchen Zhang, Claire Stewart Teitelbaum, Yali Si, Geli Zhang, Xinxin Wang, Dehua Mao, Zheng Y.X. Huangh, Willem Frederik de Boer, John Takekawa, Diann Prosser, Xiangming Xiao
2025, Proceedings of the National Academy of Sciences (122)
Highly pathogenic avian influenza viruses (HPAIV) persistently threaten wild waterfowl, domestic poultry, and public health. The East Asian–Australasian Flyway plays a crucial role in HPAIV dynamics due to its large populations of migratory waterfowl and poultry. Over recent decades, this flyway has undergone substantial landscape changes, including both losses and...
Integrating hunter dynamics and waterfowl dynamics to inform harvest management
Richard Eugene Waggaman Berl, Patrick K. Devers, G. Scott Boomer, Michael Runge
2025, Journal of Wildlife Management
The successful conservation and management of North American waterfowl relies upon an adaptive harvest management framework that accounts for changes in the system state and critical uncertainties related to the dynamics of waterfowl populations and habitats. Increasing recognition of the importance of the human dimensions of the harvest process, particularly...
RAD (Resist-Accept-Direct) switch points and triggers for adaptation planning
Abigail Lynch, Jaime Ashander, Anthony Ciocco, Amanda E. Cravens, Colin J. Dassow, Laura E. Dee, Jason B. Dunham, Mitchell Eaton, Holly Susan Embke, Joseph M. Hennessy, Alexander W. Latzka, David J Lawrence, Jeremy Littell, Brian W. Miller, Luca Palasti, Michael Runge, Gregory Sass, Aaron D. Shultz, Katherine Siegel, Leona Kay Svancara, Laura Thompson, Lindsey Thurman, Jackson Brear Valler, Sarah R. Weiskopf, Heather M. Yocum
2025, Journal of Environmental Management (392)
Climate change is transforming ecosystems globally. The Resist-Accept-Direct (RAD) framework has gained traction within many natural resource management institutions to help consider the decision space in response to this transformation. Because RAD helps manage for directional change, RAD choices entail considering which RAD pathway to implement and for how long....
Relationships between water quality, stream metabolism, and water stargrass growth in the lower Yakima River, 2018 to 2020
Rich W. Sheibley, Marcella Appel, James R. Foreman
2025, Preprint
Since the early 2000s, water clarity on the lower Yakima River has improved. Changes in best management practices combined with a total maximum daily load for suspended sediment led to these improved conditions. As water clarity improved, so did conditions for aquatic plants; the clearer the water, the better the...
Decision analysis in support of the National Elk Refuge bison and elk management plan
Jonathan D. Cook, Paul C. Cross, editor(s)
2025, Scientific Investigations Report 2025-5076
Preface This report was developed to evaluate the performance of a set of proposed alternatives for Cervus elaphus canadensis (elk) and Bison bison (bison) management at the National Elk Refuge (NER) in Wyoming, U.S.A., and to inform a National Environmental Policy Act Environmental Impact Statement focused on developing the next “Bison...
Decision framing overview and performance of management alternatives for bison and elk feedground management at the National Elk Refuge in Jackson, Wyoming
Jonathan D. Cook, Gavin G. Cotterill, Margaret C. McEachran, Tabitha A. Graves, Eric K. Cole, Paul C. Cross
2025, Scientific Investigations Report 2025-5076-A
This report was developed to evaluate the performance of a set of proposed alternatives for Cervus elaphus canadensis (elk) and Bison bison (bison) management at the National Elk Refuge in Wyoming, U.S.A., and to inform a National Environmental Policy Act Environmental Impact Statement focused on developing the next “Bison and Elk Management Plan” (BEMP)....
Evaluating elk distribution and conflict under proposed management alternatives at the National Elk Refuge in Jackson, Wyoming
Gavin G. Cotterill, Paul C. Cross, Eric K. Cole, Jonathan D. Cook, Margaret C. McEachran, Tabitha A. Graves
2025, Scientific Investigations Report 2025-5076-C
We evaluated measurable attributes describing the current and future distribution of Cervus elaphus canadensis (elk) across a region surrounding Jackson, Wyoming, for five feedground management alternatives proposed by the U.S. Fish and Wildlife Service as a revision to the 2007 “Bison and Elk Management Plan” of the National Elk Refuge....
Estimating the social and economic consequences of proposed management alternatives at the National Elk Refuge in Jackson, Wyoming
Margaret C. McEachran, Andrew Don Carlos, Gavin G. Cotterill, Eric K. Cole, Jonathan D. Cook
2025, Scientific Investigations Report 2025-5076-E
The National Elk Refuge (Refuge) is managed by the U.S. Fish and Wildlife Service and includes habitats for bison and elk. Bison and elk provide opportunities for wildlife-related recreation and contribute to the tourism industry in and around Jackson, Wyoming. Over the last century, the Refuge has provisioned supplemental feed...
Predictions of elk and chronic wasting disease dynamics at the National Elk Refuge in Jackson, Wyoming, and surrounding areas
Paul C. Cross, Jonathan D. Cook, Eric K. Cole
2025, Scientific Investigations Report 2025-5076-B
The U.S. Fish and Wildlife Service National Elk Refuge (NER) in Jackson, Wyoming, supplementally feeds Cervus elaphus canadensis (elk) and Bison bison (American bison) during winter months, but the costs and benefits of this management strategy are being reevaluated considering the potential effects of chronic wasting disease (CWD) on elk....
Predictions of elk, chronic wasting disease dynamics, and socioeconomics under alternative D at the National Elk Refuge in Jackson, Wyoming, and surrounding areas
Jonathan D. Cook, Gavin G. Cotterill, Eric K. Cole, Paul C. Cross
2025, Scientific Investigations Report 2025-5076-F
This chapter presents a description and quantitative evaluation of a collaborative alternative (alternative D) focused on near-term elk population reduction and chronic wasting disease (CWD) monitoring as part of winter elk and bison feedground operations on the National Elk Refuge adjacent to Jackson, Wyoming. Alternative D was developed by the...
Bison population dynamics, harvest, and human conflict potential under feedground management alternatives at the National Elk Refuge in Jackson, Wyoming
Jonathan D. Cook, Margaret C. McEachran, Gavin G. Cotterill, Eric K. Cole
2025, Scientific Investigations Report 2025-5076-D
Bison bison were once abundant across North America but declined due to overharvesting in the late 1800s. The reintroduced population in and around Jackson, Wyoming has averaged 485 individuals between 2018–2023 and is the subject of a planning process to inform management strategies that will guide the U.S. Fish and...
Magnitude, depth and methodological variations of spectral stress drop within the SCEC/USGS Community Stress Drop Validation Study using the 2019 Ridgecrest Earthquake Sequence
Rachel E. Abercrombie, Annemarie S. Baltay Sundstrom
2025, Bulletin of the Seismological Society of America
We present the first ensemble analysis of the 56 different sets of results submitted to the ongoing Community Stress Drop Validation Study using the 2019 Ridgecrest, California, earthquake sequence. Different assumptions and methods result in different estimation of the source contribution to recorded seismograms, and hence to the source parameters...
Turning trash into treasure: Leveraging discarded filters for national-scale aquatic eDNA biomonitoring
Devin Nicole Jones-Slobodian, Daniel J. Wieferich, Noah Fierer, Joseph Crane, Adam Sepulveda
2025, Aquaculture, Fish and Fisheries (5)
Monitoring biodiversity changes over large spatiotemporal scales is critical for effective ecosystem conservation and management. This study investigates the potential of environmental DNA (eDNA) metabarcoding to enhance national-scale biomonitoring of freshwater diversity by leveraging discarded filters associated with routine water quality sampling from the U.S. Geological Survey's (USGS) National Water...
Young explosive eruptions from the Clear Lake volcanic field
Jessica L. Ball, Seth D. Burgess, Dawnika Blatter
2025, Fact Sheet 2025-3020
The Clear Lake volcanic field is the northernmost and youngest field in a chain of volcanic fields in and near the California Coast Range mountains. For 2 million years, numerous eruptions have happened around (and through) Clear Lake. The most recent period of activity in the Clear Lake volcanic field...
Multi-scale habitat characteristics influence Paleback Darter occupancy and detection probability
Maxwell L. Hartman, Katie M. Morris, Jonathan J. Spurgeon, Steve E. Lochmann
2025, Transactions of the American Fisheries Society
ObjectiveThe limited distribution of the Paleback Darter Etheostoma pallididorsum, which is often associated with dynamic headwater streams, makes the species vulnerable to changes in its environment in west-central Arkansas. A detailed understanding of habitat characteristics that support the species at multiple spatial scales is limited. This project assessed the relative influences...
