Complex sound scattering layer and water-column dynamics over a mesophotic coral ecosystem: Southwest Puerto Rico, U.S.A.
Olivia M. Cheriton, Curt D. Storlazzi, Clark E. Sherman, Kurt J. Rosenberger, Nikolaos V. Schizas
2025, Coral Reefs (44) 2147-2154
A nearly 5-month record of high-resolution temperature and acoustic backscatter profiles from the upper insular slope off southwest Puerto Rico reveals complex sound scattering layer (SSL) dynamics over a mesophotic coral ecosystem (MCE). The SSLs exhibited both diel and reverse diel vertical migration, thin layer (< 5 m) and multiple layer formations,...
RUSH: Rapid remote sensing Updates of land cover for Storm and Hurricane forecast models
Chak Wa Cheang, Kristin Byrd, Nicholas Enwright, Daniel D. Buscombe, Christopher R. Sherwood, Dean B. Gesch
2025, Remote Sensing (17)
Coastal vegetated ecosystems, including tidal marshes, vegetated dunes, and shrub- and forest-dominated wetlands, can mitigate hurricane impacts such as coastal flooding and erosion by increasing surface roughness and reducing wave energy. Land cover maps can be used as input to improve simulations of surface roughness in advanced hydro-morphological models. Consequently,...
Shear surface undulations modulate clayey gouge strength and contribute to divergent landslide acceleration
William H. Schulz, Gonghui Wang, Yao Jiang, Brian D. Collins, Mark E. Reid, Mason Muir Einbund
2025, Engineering Geology (357)
Landslides display a spectrum of speeds for incompletely known reasons. Sliding occurs along slickensided undulatory shear surfaces within boundary shear gouge. Laboratory tests reveal that gouge shear strength generally decreases with finite cumulative displacement during relatively rapid failure and may...
A comparison of deep-sea coral and sponge species distribution models and the impact of ocean currents in the Southern California Bight
Nissa Kreidler, Andre Buchheister, David D. Huff, Jerome Fiechter, Mary Yoklavich, Mark J. Henderson
2025, Deep Sea Research Part II: Topical Studies in Oceanography (224)
Deep-sea corals and sponges (DSCS) are signature taxa of deep-water habitats, but ecological mechanisms that drive their geographic distributions can be difficult to uncover due to the challenges of surveying deep-water ecosystems and limited oceanographic data. A comparison of species distribution models was made for three DSCS...
Predicting aquatic habitat connectivity across watershed boundaries: Implications for interbasin spread of nonindigenous aquatic species.
Peter J. Pfaff, Alison A. Coulter, Benjamin J. Schall, Tanner Davis, Steven R. Chipps, David P. Coulter
2025, Frontiers in Environmental Science (113)
Understanding habitat connectivity is critical for managing nonindigenous aquatic species (NAS) spread. Dams and watershed boundaries can be impassable to NAS during typical conditions but may become temporarily passable during flooding. The goal of our project was to develop an approach for identifying locations of aquatic connectivity...
Yellowstone River Compact Commission seventy-third annual report 2024
Aaron A. Fiaschetti
2025, Report
No abstract available....
Spatiotemporal variability of algal biomass and nitrate in Owasco and Seneca Lakes in the Finger Lakes Region, New York, in 2019
Michael D.W. Stouder, Sabina R. Gifford, Kristina Gutchess, Kaitlyn M. Finkelstein, Brett D. Johnston, Karen M. Beaulieu, Joshua J. Rosen, Megan L. Essig, Guy M. Foster
2025, Scientific Investigations Report 2024-5118
Cyanobacterial harmful algal blooms (CyanoHABs) have become increasingly common, threatening the security of water resources globally. The U.S. Geological Survey conducted high-resolution nearshore mapping surveys using boat-mounted multiparameter sondes and nitrate sensors during the summer and fall of 2019 on Owasco Lake and Seneca Lake, two lakes with documented CyanoHABs...
Urban heterogeneity drives dissolved organic matter sources, transport, and transformation from local to macro scales
Rebecca Hale, Kristina G. Hopkins, Krista A. Capps, John S. Kominoski, Jennifer L. Morse, Allison H. Roy, Shuo Chen, Annika Quick, Andrew Blinn, Liz Ortiz Muñoz, Gwendolynn Folk
2025, Limnology and Oceanography (70) 3109-3125
Urbanization reshapes dissolved organic matter (DOM) sources, transport, and transformations through changes in vegetation, hydrology, and management of waste and water. Yet the impacts of urbanization on DOM are variable within and among cities. Predicting heterogeneous responses to urbanization is challenged by diverse human activities and underlying biophysical variation along...
Extremophile hotspots linked to containerized industrial waste dumping in a deep-sea basin
Johanna Gutleben, Sheila Podell, Kira Mizell, Douglas Sweeney, Carlos Neira, Lisa A. Levin, Paul R. Jensen
2025, PNAS Nexus (4)
Decaying barrels on the seafloor linked to DDT contamination have raised concerns about the public health implications of decades old industrial waste dumped off the coast of Los Angeles. To explore their contents, we collected sediment cores perpendicular to five deep-sea barrels. The concentration of DDT and its breakdown products...
Evaluating mass flow meter measurements from chambers for greenhouse gas emissions from orphan wells and other point sources
Karl B. Haase, Nicholas J. Gianoutsos
2025, Atmospheric Measurement Techniques (18) 4207-4226
This study evaluates the performance of a rigid gas flux chamber equipped with a mass flow meter (MFM) for measuring gas emissions from leaking orphan wells and similar pressure-driven gas point sources. We conducted a series of laboratory and field experiments to evaluate the sensitivity, stability, and dynamic range of...
Effects of restoration work on Kootenai River Acipenser transmontanus (white sturgeon) critical habitat, Kootenai River, northern Idaho, 2011–22
Megan K. Kenworthy, Taylor J. Dudunake
2025, Scientific Investigations Report 2025-5071
Between 2011 and 2018, the Kootenai River Habitat Restoration Project, led by the Kootenai Tribe of Idaho, implemented restoration treatments to enhance the natural recruitment of the critically endangered Acipenser transmontanus (white sturgeon) and other fish native to the Kootenai River. These restoration treatments in the Straight and Braided Reaches...
Seasonal synchronicity and multi-decadal stability of headwater biogeochemistry in the northern temperate zone
Tamara K. Harms, Jim Hood, Mark David Scheuerell, Irena F. Creed, John L. Campbell, I. J. Fernandez, S. N. Higgins, Sherri L. Johnson, James B. Shanley, Stephen Sebestyen, K. L. Webster, H. Yoa
2025, Biogeochemistry (168)
Temporal patterns in chemistry of headwater streams reflect responses of water and elemental cycles to perturbations occurring at local to global scales. We evaluated multi-scale temporal patterns in up to 32 y of monthly observations of stream chemistry (ammonium, calcium, dissolved organic carbon, nitrate, total dissolved phosphorus, and sulfate) in...
Analysis of a human-mediated microbioinvasion: The global spread of the benthic foraminifer Trochammina hadai Uchio, 1962
Mary McGann, Maria Holzmann, Vincent M.P. Bouchet, Sibelle Trevisan Disaró, Patricia P.B. Eichler, David W. Haig, Stephen J. Himson, Hiroshi Kitazato, Jean-Charles Pavard, Irina Polovodova Asteman, Andre R. Rodrigues, Clement M. Tremblin, Masashi Tsuchiya, Mark Williams, Phoebe O'Brien, Josefin Asplund, Malou Axelsson, Thomas Lorenson
2025, Journal of Micropalaeontology (44) 275-317
A non-indigenous species (NIS) of benthic foraminifera was first identified in a core collected in 1993 in San Francisco Bay, California, USA, and subsequently identified as Trochammina hadai Uchio, 1962. Archived samples and literature reviews were used to determine that the species, which is native to Asia, arrived in San Francisco Bay...
Evaluation of polymer-based dust palliatives in soil and stormwater runoff in an arid environment
Angela Paul, Erin L. Orozco-Whitaker, S. Shamsuddin, Peng Xiang, Eric Landry
2025, Archives of Environmental Contamination and Toxicology (89) 239-251
Dust palliatives are used to reduce fugitive dust in areas susceptible to erosion by wind and rain. In 2015, the Bureau of Land Management (BLM) temporarily approved the use of polymer-based dust palliatives during the construction and operation of a solar energy facility and, in 2019, on a mining access...
Seasonal variation in bay-marsh sediment exchange through a back-barrier salt marsh tidal creek
Gregg A. Snedden, S. Jarrell Smith
2025, Limnology and Oceanography (70) 3143-3154
Salt marsh resilience to sea-level rise largely depends on the balance of sediment exchanges with surrounding bays. In this study, we investigate mechanisms that determine residual sediment fluxes using continuous measurements of bay-marsh sediment exchange conducted in a tidal creek spanning 13 months (753 tidal cycles) in an intertidal marsh recently...
Mitigating flood risks in urban estuaries: Tidal dynamics, shoreline hardening, nature-based solutions, and floodgates in San Francisco Bay
Kees Nederhoff, Rohin Saleh, Patrick L. Barnard, Mark T. Stacey
2025, Journal of Waterway, Port, Coastal, and Ocean Engineering (151)
Hydrodynamic models are valuable tools for understanding the primary factors influencing daily and peak water levels and for guiding discussions on potential adaptation strategies for managing flood risk in coastal areas. This analysis uses the Delft3D San Francisco Bay-Delta Community Model to simulate water levels and incorporates the effects of...
Framework developed for geomorphic mapping of Fern Ridge Lake, Oregon, 2023
Mackenzie K. Keith, Heather D. Bervid
2025, Data Report 1215
The construction and operation of large reservoirs in the Willamette River Basin, Oregon, influences important cultural, biological, and other natural or economic resources in affected river corridors. The present-day landforms and cover within the reservoirs have been shaped by a variety of processes, including the pre-dam valley setting and geomorphic...
Placing environmental DNA monitoring for new detections into perspective: Fishes in the Milwaukee River, Wisconsin
Richard A. Erickson, Patrick W. DeHaan, Nicholas K. Frohnauer, Cari-Ann Hayer, Keta L. Oettinger, Tariq Tajjioui, Kyle M. Von Ruden, Hailey M. Willner, Stephen Frank Spear
2025, Journal of Wildlife Management (89)
Invasive species management frameworks, such as the early detection of and rapid response to invasive species, use monitoring programs to detect new species occurrences. Resource managers use environmental DNA (eDNA) as one tool for these monitoring programs. An eDNA detection in a new location may lack perspective for resource managers...
Exploring the importance of metapopulation dynamics with population control strategies for invasive silver carp in the upper Mississippi River
Kassidy Frame, Gregory J. Sandland, Charles J. Labuzzetta, Grace L. Loppnow, Jessica C. Stanton, Yu-Chun Kao, Richard A. Erickson
2025, Journal of Wildlife Management (89)
Invasive bigheaded carps (Bighead Carp Hypophthalmichthys nobilis, Silver Carp Hypophthalmichthys molitrix, and their hybrids Hypophthalmichthys spp.) currently infest the Mississippi River Basin. Bigheaded carps can outcompete native species in invaded waters and can also transform the surrounding environment. Currently, resource managers seek to limit the population abundance of bigheaded carps and their range expansion...
Bioaccumulation and transfer of per- and polyfluoroalkyl substances (PFAS) in a stream and riparian food web contaminated by food processing wastewater
Christopher James Kotalik, Laura E. Hubbard, Brittany G. Perrotta, David M. Walters, Dana W. Kolpin, James L. Gray, Alison M. Zachritz, Johanna M. Kraus, Carrie E. Givens, Gary A. Lamberti, Karen A. Kidd
2025, Environmental Science & Technology (59) 19444-19456
We evaluated the bioaccumulation and transfer of per- and polyfluoroalkyl substances (PFAS) in a stream food web contaminated by a food processing facility. Abiotic (i.e., water, sediment, and foam) and biotic (i.e., algae, aquatic insect larvae and adults, fish, and riparian spiders) matrices were sampled upstream and downstream of the...
Clarifying the trophic state concept to advance macroscale freshwater science and management
Michael Frederick Meyer, Benjamin M. Kraemer, Carolina C. Barbosa, Davi G.F. Cuhna, Walter Dodds, Stephanie E. Hampton, César Ordóñez, Rachel M. Pilla, Amina Pollard, Joshua A. Culpepper, Alexander K. Fremier, Tyler V. King, Robert Ladwig, Dina M. Leech, Shin-Ichiro S. Matsuzaki, Isabella Oleksy, Simon N. Topp, Richard Woolway, Ludmila S Brighenti, Kate Colleen Fickas, Brian P. Lanouette, Jianning Ren, Mortimer Werther, Xiao Yang
2025, Ecosphere (16)
For over a century, ecologists have used the concept of trophic state (TS) to characterize an aquatic ecosystem's biological productivity. However, multiple TS classification schemes, each relying on a variety of measurable parameters as proxies for productivity, have emerged to meet use-specific needs. Frequently, chlorophyll a, phosphorus, and Secchi depth...
Assessment of natural gas pipeline construction on stream temperature and turbidity in southwestern Virginia, 2017—25
Brendan M. Foster, Carly Marcella Maas, Alejandra Logan Flota
2025, Preprint
The natural gas pipeline network in the United States is extensive and often intersects streams and other sensitive habitats, yet there are limited case studies utilizing a comparative upstream-downstream approach to evaluate potential short- and long-term effects of pipeline stream crossing construction from pre-construction to post-site restoration. In 2017, the...
An integrated sensor network and data driven approach to satellite remote sensing of dissolved organic matter
Dulcinea Marie Avouris, Erin L Hestir, Jacob Fleck, Jeffrey A. Hansen, Brian A. Bergamaschi
2025, Earth and Space Science (12)
Traditional remote sensing retrieval models for water quality have historically relied on limited, localized data sets due to the prohibitive costs of extensive field campaigns and logistical challenges of collecting match-up data with satellite overpasses. As a result, these models often lack generalizability across seasons, tides, and sites. Furthermore, small...
Impacts of lake elevation decline on spawning habitat of a critical, native forage species
Sarah Barnes, Robert Al-Chokhachy, Phaedra E. Budy
2025, Transactions of the American Fisheries Society (154) 640-656
ObjectiveLake elevation decline is a global phenomenon with pronounced effects in arid regions that changes the characteristics of nearshore habitat area available to lacustrine spawners, potentially impacting recruitment and whole-lake food web dynamics. Our objective was to understand the potential effects of lake elevation decline on spawning habitat for the...
Clarifying the trophic state concept to advance macroscale freshwater science and management
Michael Frederick Meyer, Benjamin M. Kraemer, Carolina C. Barbosa, Davi G.F. Cuhna, Walter Dodds, Stephanie E. Hampton, César Ordóñez, Rachel M. Pilla, Amina Pollard, Joshua A. Culpepper, Alexander K. Fremier, Tyler V. King, Robert Ladwig, Dina M. Leech, Shin-Ichiro S Matsuzaki, Isabella Oleksy, Simon N. Topp, R. Iestyn Woolway, Ludmila S. Brighenti, Kate Fickas, Brian P. Lanouette, Jianning Ren, Mortimer Werther, Xiao Yang
2025, Ecosphere (16)
For over a century, ecologists have used the concept of trophic state (TS) to characterize an aquatic ecosystem's biological productivity. However, multiple TS classification schemes, each relying on a variety of measurable parameters as proxies for productivity, have emerged to meet use-specific needs. Frequently, chlorophyll a, phosphorus, and Secchi depth...
