Toward a four-dimensional petrogenetic model of a distributed volcanic field on the southern edge of the Colorado Plateau
Marissa E. Mnich, Christopher D. Condit
2026, Professional Paper 1890-N
A detailed characterization of the >3,000 square kilometer (km2) Springerville volcanic field, located on the southern tip of the Colorado Plateau in Arizona, United States, with its more than 501 volcanic units and widely distributed >420 cinder cones and lava flows, provides constraints toward an integrated petrogenetic model for the...
Sea-level rise in a coastal marsh: Linking increasing tidal inundation, decreasing soil strength and increasing pond expansion
Mona Huyzentruyt, Lennert Schepers, Matt L. Kirwan, Glenn Guntenspergen, Stijn Temmerman
2026, Biogeosciences (23) 751-766
Coastal marsh conversion into ponds, which may be triggered by sea-level rise, is considered an important driver of marsh loss and their valuable ecosystem services. Previous studies have focused on the role of wind waves in driving the expansion of interior marsh ponds, through lateral erosion of marsh edges surrounding...
Extreme Potomac floods at Washington D.C. during the past 500 years
Michael Toomey, Thomas M. Cronin, Jessica R. Rodysill, Julia Lynn Seidenstein, Debra A. Willard
2026, Geophysical Research Letters (53)
Washington D.C. faces one of the highest 100-year flood risks of any major city along the U.S. East Coast. In addition to storm-surge inundation during hurricanes and nor'easters, water-level observations for Washington are strongly skewed by major floods on the Potomac River. Using geologic and historic records we find new...
Bedrock geologic map of the Eagle Lake quadrangle, Essex County, New York
Gregory J. Walsh, Sean P. Regan, Phillip S. Geer, Arthur J. Merschat, Kaitlyn A. Suarez, Ryan J. McAleer, Matt S. Walton, Jr., E. Allen Crider, Jr.
2026, Scientific Investigations Map 3542
The bedrock geology of the 7.5-minute Eagle Lake quadrangle, Essex County, New York, consists of deformed and metamorphosed Mesoproterozoic gneisses of the Adirondack Highlands unconformably overlain by weakly deformed lower Paleozoic sedimentary rocks of the Champlain Valley. The Mesoproterozoic rocks occur on the eastern edge of the Adirondack Highlands and...
Revisiting the geochronology of late Quaternary marine terraces and uplift rates in coastal Santa Barbara County, California, USA
Daniel R. Muhs, R. Randall Schumann, Jordon Bright, Helen M. Roberts, Lindsey T. Groves
2026, Geomorphology (501)
In several early studies, central California marine terraces between Santa Barbara and Point Conception were interpreted to record sea-level high stands of the last interglacial complex, ∼80 ka to ∼120 ka (marine isotope stage [MIS] 5). These ages and their elevations (∼20 m to ∼45 m) indicate modest rates of tectonic...
Recent range expansion and documentation of a reproductive population of northern snakehead Channa argus (Cantor, 1842) in the Saint Francis River Drainage, Missouri
Edward M. Sterling, Taylor A. Bookout, Erin Holmes, Neil Baalman, Cody Henderson, Patrick Kroboth
2026, Records of Biological Invasions (15) 183-194
Northern snakehead Channa argus (Cantor, 1842) is an aquatic invasive fish species in the United States with first documented occurrence in the wild in the 2000s. Management efforts to control their populations in the eastern United States are ongoing. In the Mississippi River basin, limited resources have been allocated to...
Ground-motion simulations for the 2024 Mw 4.8 Tewksbury, New Jersey, earthquake
Oliver S. Boyd, Ebru Bozdağ, Haiyang Liam Kehoe, Morgan P. Moschetti
2026, Seismological Research Letters (97) 755-766
Ground-motion simulations of notable earthquakes in the central and eastern United States are limited and typically assume one-dimensional (1D) Earth structure. In this study, we use a three-dimensional (3D) seismic velocity model to better constrain the depth and focal mechanism of the April 5th, 2024, moment magnitude 4.8 Tewksbury earthquake...
Magnitude conversion relations create substantial differences in seismic hazard models
Andrea L. Llenos, David R. Shelly, Allison M. Shumway
2026, Seismological Research Letters
Earthquake catalogs are essential data inputs for seismic hazard modeling. Because earthquake magnitudes are reported in a variety of types (e.g., local magnitudes and moment magnitudes), magnitude conversion relationships must be used to convert the different magnitude types present in a catalog to a uniform magnitude type to avoid biases...
Tectonic implications of transitional melting regimes from petrological, geochronological, and compositional characterization of the ophiolitic Seventymile terrane, Alaska, USA
Erin Todd, Jonathan Saul Caine, Michael Bizimis, Andrew R.C. Kylander-Clark, Robert Reece Hammond, Alicja Wypych
2026, Geosphere (22) 296-339
New geochemical, U-Pb geochronology, and Sr-Nd-Hf isotope data provide evidence for the tectonic evolution of the Seventymile terrane in interior Alaska, USA. Ultramafic and mafic rocks of the Seventymile terrane are thought to represent components of a dismembered ophiolite and provide unique constraints on regional terrane evolution and accretion. The...
Distinguishing natural from mining-related metal sources by including streambank groundwater data in a stream mass loading study
Andrew H. Manning, Robert L. Runkel, Jean M. Morrison, Sara Warix, Richard B. Wanty, Katherine Walton-Day, Michael Snook
2026, Journal of Contaminant Hydrology (277)
Distinguishing stream metal loading caused by mine features from that caused by natural background sources remains challenging, yet this distinction is essential for making effective remedial decisions at many legacy mine sites. We combine a stream tracer injection and synoptic sampling study with data from shallow near-stream groundwater wells to...
Assessment of the fish tumors or other deformities beneficial use impairment and associated risks at two Lake Michigan Areas of Concern
Vicki S. Blazer, Cheyenne Rose Smith, Heather L. Walsh, P.M. Mazik, M.R. Magee
2026, Ecotoxicology (35)
The U.S. Great Lakes Areas of Concern (AOCs) have been designated due to significant environmental degradation, with multiple Beneficial Use Impairments (BUIs) requiring remediation before delisting. The “fish tumors or other deformities” BUI remains at the Sheboygan River and the Lower Green Bay and Fox River AOCs,...
Capturing the uncertainty of seismicity observations in earthquake rate estimates: Implications for probabilistic seismic hazard analysis and the USGS National Seismic Hazard Model
Andrew J. Michael, Andrea L. Llenos
2026, Bulletin of the Seismological Society of America (116) 786-809
The rate of earthquakes in a region is a fundamental input to Probabilistic Seismic Hazard Analysis. We present a Monte Carlo method for computing that rate from seismicity catalogs while including a range of data and analysis uncertainties. This method is applied to regions for which the b value is assumed to...
The value of reducing uncertainties to support the management of a high‐elevation endemic salamander
Evan H. Campbell Grant, Jo A. Werba, Riley Olivia Mummah, Adrianne Brand
2026, Ecosphere (16)
Many salamander populations are declining, and methods to determine how best to allocate limited resources to slow or reverse these declines could support land managers in their decision‐making processes. Multiple types of uncertainty may delay management decisions, including when (1) knowledge of a species' ecology is incomplete,...
An analysis of the linked decisions in the confiscation of illegally traded turtles
Desireé Smith, Graziella V. DiRenzo, Jillian Elizabeth Fleming, Margaret C. McEachran, Evan H. Campbell Grant
2026, Conservation Science and Practice (8)
Over the last few decades, freshwater turtles have become more common in the illegal wildlife trade because of growing global demand. Illegally traded turtles may be intercepted by several different agencies with separate jurisdictions. When turtles are confiscated, uncertainties may make releasing them back to the wild...
Changing dynamic phosphorus forms from field to stream during surface runoff events
Rebecca M. Kreiling, Tanja N. Williamson, Faith A. Fitzpatrick, Kenna J. Gierke, James D. Blount, Patrik Mathis Perner, Isaac James Mevis, Heidi M. Broerman, Katherine R. Merriman, Matthew J. Komiskey
2026, Journal of Environmental Quality (55)
The risk of water quality impairment from agricultural runoff depends on nutrient source, transport, and bioavailability. Phosphorus (P) spirals between dissolved and particulate forms as it is transported with suspended sediment (SS) from agricultural fields, through the stream network, to receiving water bodies. This dynamic sorption-desorption influences bioavailability. We quantified...
Novel adomaviruses associated with blotchy bass syndrome in black basses (Micropterus spp.)
Luke R. Iwanowicz, Clayton D. Raines, Kelsey T. Young, Vicki S. Blazer, Heather L. Walsh, Geoff Smith, Cynthia Holt, John Odenkirk, Tom Jones, Jan-Michael Hessenauer, Morgan Alexandra Biggs, Christopher B. Buck, Justin Blaine Greer, Robert S. Cornman
2026, PLoS ONE (20)
Black bass (Micropterus spp.) are the most important warmwater game fishes in the United States. They have high socioeconomic and recreational value and support an important aquaculture industry. Since 2008, fisheries managers have been reporting the observation of hyperpigmented melanistic lesions (HPMLs) on smallmouth bass (M. dolomieu)...
Multi-scale geophysical mapping of the brine and bedrock surfaces along the Dolores River, Paradox Valley, Colorado, December 2023
Neil C. Terry, M. Alisa Mast, Andrea L. Creighton, Joel William Homan, Connor P. Newman, Suzanne S. Paschke
2026, Near Surface Geophysics (24) 36-49
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...
Development of high-throughput genomic resources to inform white-tailed deer population and disease management
David Navarro, Emily K. Latch, Anaïs K. Tallon, Caitlin N. Ott-Conn, Randy W. DeYoung, Daniel P. Walsh, Peter T. Euclide, R.G. Chandika, Wes A. Larson, Arun S. Seetharam, Andrew J. Severin, Andrew J. Severin, James M. Reecy, Zhi-Liang Hu, Jay R. Cantrell, Michelle Carstensen, Joe N. Caudell, Charlie H. Killmaster, Mitch L. Lockwood, William T. McKinley, Andrew S. Norton, Krysten L. Schuler, Daniel J. Storm, Jason A. Sumners, W. David Walter, Julie A. Blanchong
2026, Molecular Ecology Resources (26)
White-tailed deer (Odocoileus virginianus) are the most abundant and widespread cervid in North America. Genetic data are used as a tool to monitor populations and make management decisions for this game species. However, the development and use of genomic tools that can generate a set of markers suitable for longitudinal...
Hosts, pathogens and hot ponds: Thermal mean and variability contribute to spatial patterns of chytrid infection
Brendan K Hobart, Daniel A. Grear, Megan Winzeler, Travis Mcdevitt-Galles, Timothy M Korpita, Erin L. Muths, Valerie J McKenzie
2026, Oikos (2026)
Temperature is a primary driver of heterogeneity in host–pathogen dynamics and understanding how patch-scale temperature affects landscape-scale patterns of pathogen infection is key to effective monitoring and management. In field studies, both temperature variability and mean temperature are often related to infection of ectothermic animals by fungal pathogens, and although...
Demographic mechanisms of snowshoe hare population cycles in Yukon, Canada
Madan K. Oli, Alice J Kenney, Rudy Boonstra, Stan Boutin, Dennis Murray, Thomas Jung, James E. Hines, Charles J Krebs
2026, Journal of Animal Ecology (95) 21-38
One hundred years have elapsed since Charles Elton (1924) described the periodic fluctuations in North American snowshoe hare abundance, yet mechanisms underlying 9–11-year population cycles in snowshoe hares continue to be debated.We applied multistate capture–mark–recapture models to long-term field data (1977–2020) based on >20,000 captures of >7000 unique snowshoe...
Double agents: Invasive Burmese pythons (Python bivittatus) and Argentine black and white tegus (Salvator merianae) as potential seed dispersers in south Florida
Adrian Figueroa, Katherine R. Davis, Madison E.A. Harman, Ian A. Bartoszek, Ian C. Easterling, Amy A. Yackel Adams, Christina M. Romagosa
2026, Journal of Zoology (328) 187-202
Invasive species can reshape ecological processes, including seed dispersal, through both direct and indirect pathways. In this study, we explore how invasive reptiles influence seed dispersal dynamics in the Greater Everglades ecosystem using two case studies: the Burmese python (Python bivittatus) and the Argentine black and white tegu (Salvator merianae)....
Same view through a different lens: Comparing population trends for North American birds using eBird and the Breeding Bird Survey
Orin J. Robinson, Alison J. Johnston, Wesley M. Hochachka, J. A. Hostetler, John R. Sauer, Tom Auer, Matthew E. Strimas-Mackey, Shawn Ligocki, Nicholas A. Faraco-Hadlock, Viviana Ruiz-Gutierrez, Amanda D. Rodewald, Daniel Fink
2026, Ornithological Applications (128) 1-14
Confidently estimating population trends is of vital importance for a wide range of ecological, conservation, and management applications. North America has 2 major data sources for estimating population trends of breeding birds—the North American Breeding Bird Survey (BBS) and the global participatory science project eBird. Because the...
Reconciliation of geochronology and paleozoogeography for Quaternary marine terraces, San Luis Obispo Bay area, California, USA
Daniel R. Muhs, Lindsey T. Groves, R. Randall Schumann, Jordon Bright
2026, Palaeogeography, Palaeoclimatology, Palaeoecology (681)
In the San Luis Obispo Bay area of central California, interpretations of marine terrace ages have been hampered by inconsistent results from geochronological indicators (U-series ages of corals and correlations using amino acid racemization of mollusks) and seemingly contradictory...
An approach to modeling abundance of marine wildlife over space and time using unstructured aerial surveys
Timothy A. Gowan, Jennifer Moore, Holly Edwards, Ashley B.C. Goode, Julien Martin
2026, Journal of Wildlife Management (90)
Estimating spatial and temporal patterns in abundance is often a goal of ecological studies and can be useful for informing management decisions, such as determining the optimal placement of wildlife protection zones. However, estimating abundance can be difficult in practice, especially over large areas, because of imperfect detection, where individuals...
Assessment of treated wastewater infiltration in Bright Angel Wash and the potential for contaminants of emerging concern influencing spring water quality along the South Rim of the Grand Canyon in Grand Canyon National Park, Arizona
Nicholas V. Paretti, Kimberly R. Beisner, Sarah J.R. Shepherd
2025, Scientific Investigations Report 2025-5095
In April 2021, a synoptic study conducted by the U.S. Geological Survey (USGS) and National Park Service (NPS) identified wastewater-related contaminants of emerging concern (CECs) in springs along the South Rim of the Grand Canyon. These springs are located north of Bright Angel Wash, an ephemeral channel that receives treated...
