Meta-analysis of a megafish: Assessing patterns and predictors of Alligator Gar movement across multiple populations
Hayden C. Roberts, Florian Kappen, Matthew Ross Acre, Daniel J. Daugherty, Nathan G. Smith, Joshuah S. Perkin
2025, Movement Ecology (13)
BackgroundFreshwater megafishes are among some of the most commercially and ecologically important aquatic organisms yet are disproportionately threatened with range and population reduction. Anthropogenic alterations of rivers influencing migrations are among the most significant causes for these declines. However, migratory fishes do not always respond similarly to movement...
6PPD-quinone in water from the San Francisco-San Joaquin Delta, California, 2018-2024
Gabrielle Pecora Black, Matthew D. De Parsia, Matthew Uychutin, Rachael F. Lane, James Orlando, Michelle L. Hladik
2025, Environmental Monitoring and Assessment (197)
The Sacramento-San Joaquin Delta (Delta) is an expansive river delta supplying a large portion of California’s fresh water for agriculture and residential use, and it is also an area of critical habitat for numerous state and federally listed species of concern. In many locations, urban stormwater flows directly into the...
Assessment of effects of channelization mitigation alternatives of Stoney Brook, Carlton and St. Louis Counties, Minnesota
Charles V. Cigrand
2025, Scientific Investigations Report 2025-5004
The U.S. Geological Survey, in cooperation with the Fond du Lac Band of Lake Superior Chippewa (FDLB), studied the effects of channel modification alternatives on lake levels and floodplain inundation in the Stoney Brook watershed in northeast Minnesota. Northern wild rice (Zizania palustris), also referred to as manoomin by the...
Characterizing the scale of regional landslide triggering from storm hydrometeorology
Jonathan P. Perkins, Nina S. Oakley, Brian D. Collins, Skye C. Corbett, W. Paul Burgess
2025, Natural Hazards and Earth Systems Sciences (NHESS) (25) 1037-1056
Rainfall strongly affects landslide triggering; however, understanding how storm characteristics relate to the severity of landslides at the regional scale has thus far remained unclear, despite the societal benefits that would result from defining this relationship. As mapped landslide inventories typically cover a small region relative to a storm system,...
Use of multi-resolution, three-dimensional hydrodynamic and water-quality models to assess response to nutrient load reductions in Barnegat Bay-Little Egg Harbor estuary, New Jersey, USA
Vincent T. DePaul
2025, Marine Pollution Bulletin (214)
A coupled three-dimensional hydrodynamic water-quality model has been applied to Barnegat Bay-Little Egg Harbor Estuary, a shallow, back-barrier lagoon located along the central New Jersey coastline. The study aims to enhance understanding of phytoplankton dynamics and nutrient cycling and to quantify estuarine response to potential nutrient load management...
UAV-derived models of vegetation characteristics do not transfer to extreme drought and wet conditions across a northern Arizona landscape
Ryan C. Blackburn, Ginger R. H. Allington, Nicole Motzer, Seth Munson, Qiongyu Huang
2025, Landscape Ecology (40)
Context Shifts in precipitation regimes due to climate change are significantly impacting dryland ecosystems, including vegetation composition and structure. Unoccupied aerial vehicles (UAVs) are widely used to monitor vegetation, but whether models built to predict changes in these characteristics are robust under extreme precipitation regimes is unclear.ObjectivesWe aimed to predict key vegetation...
A wetland for all seasons? Evaluating congruence in avian species richness and habitat associations within restored wetlands across the annual cycle
J. Podoliak, Elisabeth B. Webb, D. Hicks
2025, Wetlands (45)
Wetland restoration on agricultural land to enhance wildlife habitat through the Wetland Reserve Easement (WRE) program has substantially increased wetland area within the Lower Mississippi Alluvial Valley (LMAV). Studies assessing avian response to wetland restoration often focus on specific communities during one season such as passerines in spring or waterfowl...
Peak streamflow trends in Minnesota and their relation to changes in climate, water years 1921–2020
Tara Williams-Sether, Chris Sanocki
2025, Scientific Investigations Report 2023-5064-E
This report chapter summarizes the effect of hydroclimatic variability of annual peak streamflow in Minnesota and is part of a larger U.S. Geological Survey multistate study to assess potential nonstationarity in annual peak streamflows across the Midwest. Spatial and temporal patterns were examined for nonstationarity in annual peak streamflow, daily...
Peak streamflow trends in North Dakota and their relation to changes in climate, water years 1921–2020
Karen R. Ryberg, Tara Williams-Sether
2025, Scientific Investigations Report 2023-5064-H
Standardized guidelines for completing flood-flow frequency analyses are presented in a U.S. Geological Survey Techniques and Methods report known as Bulletin 17C, https://doi.org/10.3133/tm4B5. In recent decades (since about 2000), a better understanding of long-term climatic persistence (periods of clustered floods or droughts, or wet or dry periods) and...
Preferential groundwater discharges along stream corridors are disregarded sources of greenhouse gases
A.M. Bisson, F. Liu, Eric M. Moore, Martin A. Briggs, A. M. Helton
2025, JGR Biogeosciences (130)
Groundwater delivery of greenhouse gases (GHGs) to stream banks and riparian areas, before mixing with surface waters, has not been well quantified. We measured preferential groundwater delivery of GHGs to stream banks within three stream reaches, and found that stream banks with discharging groundwater emitted more CO2 and were sources of...
Partial diel vertical migration and niche partitioning in Mysis revealed by stable isotopes
Bianca Possamai, Rosaura J. Chapina, Daniel L. Yule, Jason D. Stockwell
2025, Journal of Great Lakes Research (51)
Diel vertical migration (DVM) is critical for moving energy and nutrients between surface and deep waters. Mysis sp. (Crustacea: Mysidae) facilitates this process by serving as predator and prey in both benthic and pelagic habitats. Mysis can also exhibit partial DVM (pDVM), where some individuals do not migrate into the pelagia at night or...
North American Waterfowl Management Plan survey regional profile—Southeast region
Nicholas W. Cole, David C. Fulton
2025, Scientific Investigations Report 2024-5102
Executive SummaryGaining a better understanding of the human dimensions of waterfowl management to inform the North American Waterfowl Management Plan is a valuable but challenging goal for the future success of waterfowl management. Increasing engagement with key stakeholder groups will lead to more support and effective waterfowl management. Social systems...
Bedrock fracture characterization of the New Hampshire State Route 111 bypass, Windham, New Hampshire
Gregory J. Walsh, Nicholas Edwin Powell
2025, Data Report 1208
Bedrock roadcuts developed with blasting along the New Hampshire State Route 111 bypass in Windham expose the metasedimentary Silurian Berwick Formation and intrusions of multiple phases of foliated to nonfoliated granite to granitic pegmatite of the Devonian New Hampshire Plutonic Suite. Fracture characterization at two roadway rock cuts (roadcuts) included...
What are the impacts of fracking operations on local water quality?
Jennifer S. Harkness
2025, Nature Reviews Earth & Environment (6) 160
No abstract available....
METRIC: An interactive framework for integrated visualization and analysis of monitored and expected load reductions for nitrogen, phosphorus, and sediment in the Chesapeake Bay watershed
Qian Zhang, Gary W. Shenk, Gopal Bhatt, Isabella Bertani
2025, Environmental Modelling & Software (188)
Reductions of nitrogen, phosphorus, and sediment loads have been the focus of watershed restoration in many regions for improving water quality, including the Chesapeake Bay. Watershed models and riverine monitoring data can provide important information on the progress of load reductions but do not always generate consistent interpretations. A new...
Mercury speciation and stable isotopes in emperor penguins: First evidence for biochemical demethylation of methylmercury to mercury-dithiolate and mercury-tetraselenolate complexes
Alain Manceau, Paco Bustamante, Etienne Richy, Yves Cherel, Sarah E. Janssen, Pieter Glatzel, Brett A. Poulin
2025, Journal of Hazardous Materials (485)
Apex marine predators, such as toothed whales and large petrels and albatrosses, ingest mercury (Hg) primarily in the form of methylmercury (MeHg) via prey consumption, which they detoxify as tiemannite (HgSe). One of the most intriguing current questions in Hg research is how more abundant lower trophic level predators detoxify...
Estimating agricultural irrigation water consumption for the High Plains aquifer region with integrated energy- and water-balance evapotranspiration modeling approaches
Lei Ji, Gabriel B. Senay, MacKenzie Friedrichs, Stefanie Kagone
2025, Agricultural Water Management (309)
Estimation of irrigation water use provides essential information for the management and conservation of agricultural water resources. Conventionally, water use data are created based on reports and surveys from water users, whereas manual records may not be complete due to lacking flow meters, measurement gaps, inconsistent methods across regions, and...
Leveraging high-frequency sensor data and U.S. National Water Model output to forecast turbidity in a drinking water supply basin
John T. Kemper, Kristen L. Underwood, Scott Douglas Hamshaw, Dany Davis, Jason Siemion, James B. Shanley, Andrew W. Schroth
2025, Journal of the American Water Resources Association (JAWRA) (61)
As high-frequency sensor networks increasingly enhance data-driven models of water quality, process-based models like the U.S. National Water Model (NWM) are generating accessible forecasts of streamflow at increasingly dense scales. There is now an opportunity to combine these products to construct actionable water quality forecasts. To that end, we couple...
Prioritization of research on drought assessment in a changing climate
Joel Lisonbee, Britt Parker, Erica Fleishman, Trent Ford, R. Kyle Bocinsky, Gretel Follingstad, Abby G. Frazier, Zachary H. Hoylman, Amy R. Hudson, John W. Nielsen-Gammon, Natalie A. Umphlett, Elliot Wickham, Aparna Bamzai-Dodson, Royce Fontenot, Brian Fuchs, John C. Hammond, Jeffrey E. Herrick, Mike Hobbins, Andy Hoell, Jacob Jones, Erin Lane, Zack Leasor, Yongqiang Liu, Jason A. Otkin, Amanda Sheffield, Dennis Todey, Roger Pulwarty
2025, Earth's Future (13)
Drought is a period of abnormally dry weather that leads to hydrological imbalance. Drought assessments determine the characteristics, severity, and impacts of a drought. Climate change adds conceptual and quantitative challenges to traditional drought assessments. This paper highlights the challenges of assessing drought in a climate made non-stationary by human...
The effects of unpaved roads on instream sediment: Patterns and challenges for monitoring
Robert Al-Chokhachy, Geoffrey C. Poole, Cameron Thomas, Carl Saunders, Brett B. Roper, Shane Hendrickson, Cory Davis, Kyle Crapster, Eric Archer
2025, Journal of the American Water Resources Association (61)
Despite > 700,000 km of unpaved roads in the western United States, our knowledge of how roads impact instream sediment is unclear. We combined two studies, including (1) a regional analysis linking stream habitat data from a large-scale monitoring program with road density data to identify generalizable relationships between roads and streambed...
Watershed hydrology assessment for the Nueces River basin–Appendix D, RiverWare analyses
David Wallace
2025, Report
No abstract available....
Watershed hydrology assessment for the Nueces River basin--Appendix A, statistical hydrology.
David Wallace, Kara M. Watson
2025, Report
No abstract available....
Natural capital accounting on forested lands: An application to the Colorado River basin
Travis Warziniack, Kenneth J. Bagstad, Michael Knowles, Christopher Mihiar, Arpita Nehra, Charles Rhodes, Leslie Sanchez, Christopher Sichko, Charles B. Sims
Nicholas Z. Muller, Eli P. Fenichel, Mary Bohman, editor(s)
2025, Conference Paper, Measuring and accounting for environmental public goods: A national accounts perspective
This paper creates a first set of forest natural capital accounts and demonstrates how these accounts can be integrated with general equilibrium models of the economy. Focusing on the Colorado River Basin, we show that deforestation has direct implications for the forest industry and indirect impacts on the economy through...
Pesticide contamination detected across five wildlife refuges in the Sacramento Valley of California
Angie Lenard, Therese Burns, Michelle Hladik, Kaylene Keller, Samantha Marcum, Wayne E. Thogmartin, Matthew L. Forister
2025, Science of the Total Environment (969)
An important goal for the applied ecological sciences is to understand the extent to which the biodiversity on conserved or managed lands is exposed to anthropogenic stressors. Among the various categories of conserved lands in the United States, the National Wildlife Refuge System is focused on the protection and management...
Fisheries research and monitoring activities of the Lake Erie Biological Station, 2024
Mark Richard Dufour, Francesco Guzzo, Corbin David Hilling, Kevin R. Keretz, Richard Kraus, Richard Cole Oldham, James Roberts, Joseph Schmitt
2025, Report
A comprehensive understanding of fish populations and their interactions is the cornerstone of modern fishery management and the basis for Lake Erie’s Fish Community Objectives (FCOs) developed in 2020 (Francis et al. 2020). The 2024 U.S. Geological Survey (USGS) Lake Erie Biological Station Annual Report is responsive to these FCOs...
