Timing and amount of southern Cascadia earthquake subsidence over the past 1700 years at northern Humboldt Bay, California, USA
Jason S. Padgett, Simon E. Engelhart, Harvey M. Kelsey, Robert C. Witter, Niamh Cahill, Eileen Hemphill-Haley
2021, GSA Bulletin (133) 2137-2156
Stratigraphic, lithologic, foraminiferal, and radiocarbon analyses indicate that at least four abrupt mud-over-peat contacts are recorded across three sites (Jacoby Creek, McDaniel Creek, and Mad River Slough) in northern Humboldt Bay, California, USA (∼44.8°N, −124.2°W). The stratigraphy records subsidence during past megathrust earthquakes at the southern Cascadia subduction zone ∼40...
Partial migration and spawning movements of humpback chub in the Little Colorado River are better understood using data from autonomous PIT tag antennas
Maria C. Dzul, William Louis Kendall, Charles Yackulic, Dana L. Winkelman, David Randall Van Haverbeke, Michael D. Yard
2021, Canadian Journal of Fisheries and Aquatic Sciences (78) 1057-1072
Choosing whether or not to migrate is an important life history decision for many fishes. Here we combine data from physical captures and detections on autonomous passive integrated transponder (PIT) tag antennas to study migration in an endangered fish, the humpback chub (Gila cypha). We develop hidden Markov mark-recapture models...
Nutrients and warming alter mountain lake benthic algal structure and function
Isabella A. Oleksy, Jill S. Baron, Whitney S. Beck
2021, Freshwater Science (40) 87-102
In recent years, benthic algae have been increasing in abundance in the littoral zones of oligotrophic lakes, but causality has been hard to assign. We used field and laboratory experiments to explore the implications of increasing water temperature and nutrient availability for benthic algal assemblages and ecosystem...
Nutrient concentrations, loads, and yields in the Middle Iowa River Basin, Iowa
Jessica D. Garrett, Stephen J. Kalkhoff
2021, Scientific Investigations Report 2020-5148
Concentrations, loads, and yields of nitrate plus nitrite, total nitrogen, and total phosphorus were assessed in the Iowa River upstream from the Coralville Reservoir in east-central Iowa. The results of this study describe baseline nutrient transport during two historical reference periods, 1980–96 and 2006–10, that can be used to evaluate...
Precipitation, peak streamflow, and inundation in the Bynum Run and Winters Run watersheds in Harford County, Maryland
Christopher W. Nealen, Edward J. Doheny
2021, Scientific Investigations Report 2021-5007
The Harford County Department of Public Works and the U.S. Geological Survey have been working cooperatively to monitor continuous streamflow at several streamgages in Harford County, Maryland, including Bynum Run and Winters Run. A perceived recent uptick in the number of flooding events in the Bynum Run and Winters Run...
Terrestrial and semi-aquatic scavengers on invasive Pacific pink salmon (Oncorhynchus gorbuscha) carcasses in a riparian ecosystem in northern Norway.
Kathy M. Dunlop, Mark S. Wipfli, Rune Muladal, Grzegorz Wierzbinski
2021, Biological Invasions (23) 973-979
Pacific pink salmon (Oncorhynchus gorbuscha) invasions, thought to originate from populations introduced and established in Russia, occurred along the Norwegian coast in 2017 and 2019. Despite several thousand pink salmon entering and establishing in northern Norwegian rivers, current understanding of the ecological effect of the species in northern Europe is...
Aeromagnetic map of Burney and the surrounding area, northeastern California
Victoria E. Langenheim
2021, Open-File Report 2021-1006
An aeromagnetic survey was conducted to improve understanding of the geology and structure in the area around Burney, northeastern California. The new data are a substantial improvement over existing data and reveal a prominent north northwest-trending magnetic grain that allows extension of mapped faults, delineation of plutons within the Mesozoic...
Using machine learning to develop a predictive understanding of the impacts of extreme water cycle perturbations on river water quality
Charuleka Varadharajan, Vipin Kumar, Jared Willard, Jacob Aaron Zwart, Jeffrey Michael Sadler, Helen Weierbach, Talita Perciano, Juliane Mueller, Valerie Hendrix, Danielle Christianson
2021, Report
This whitepaper addresses to two focal areas – (3) Insight gleaned from complex data using Artificial Intelligence (AI), and other advanced techniques (primary), and (2) Predictive modeling through the use of AI techniques and AI-derived model components (secondary). This topic is directly relevant to four DOE Earth and Environmental Systems...
Biological and anthropogenic influences on macrophage aggregates in white perch Morone americana from Chesapeake Bay, USA
Mark A Matsche, Vicki S. Blazer, Erin Pulster, Patricia M. Mazik
2021, Diseases of Aquatic Organisms (143) 79-100
The response of macrophage aggregates in fish to a variety of environmental stressors has been useful as a biomarker of exposure to habitat degradation. Total volume of macrophage aggregates (MAV) was estimated in the liver and spleen of white perch Morone americana from Chesapeake Bay using stereological approaches. Hepatic and splenic MAV...
Syntrophotalea acetylenivorans sp. nov., a diazotrophic, acetylenotrophic anaerobe isolated from intertidal sediments
Shaun Baesman, John M. Sutton, Janna L. Fierst, Denise M. Akob, Ronald S. Oremland
2021, International Journal of Systematic and Evolutionary Microbiology (73)
A Gram-stain-negative, strictly anaerobic, non-motile, rod-shaped bacterium, designated SFB93T, was isolated from the intertidal sediments of South San Francisco Bay, located near Palo Alto, CA, USA. SFB93T was capable of acetylenotrophic and diazotrophic growth, grew at 22–37 °C, pH 6.3–8.5 and in the presence of 10–45 g l−1 NaCl. Phylogenetic analyses...
The role of habitat heterogeneity and canyon processes in structuring sediment macrofaunal communities associated with hard substrate habitats in Norfolk Canyon, USA
Jill R. Bourque, Amanda Demopoulos, Craig M. Robertson, Furu Mienis
2021, Deep Sea Research Part I: Oceanographic Research Papers (170)
Topographic and hydrodynamic complexity in submarine canyons promotes steep gradients in food availability and geophysical parameters which affect ecological assemblages and beta diversity. While habitat heterogeneity in submarine canyons is known to support diverse and abundant megafaunal communities, due to difficulty...
Linking decomposition rates of soil organic amendments to their chemical composition
Jeffrey R Baldock, Courtney Creamer, Steve Szarvas, Janine McGowan, T. Carter, Mark Farrell
2021, Soil Research (59) 630-643
The stock of organic carbon contained within a soil represents the balance between inputs and losses. Inputs are defined by the ability of vegetation to capture and retain carbon dioxide, effects that management practices have on the proportion of captured carbon that is added to soil and the...
Machine-learning predictions of redox conditions in groundwater in the Mississippi River Valley alluvial and Claiborne aquifers, south-central United States
Katherine J. Knierim, James A. Kingsbury, Connor J. Haugh
2021, Scientific Investigations Map 3468
Machine-learning models developed by the U.S. Geological Survey were used to predict iron concentrations and the probability of dissolved oxygen (DO) concentrations exceeding a threshold of 1 milligram per liter (mg/L) in groundwater in aquifers of the Mississippi embayment physiographic region. DO and iron concentrations are driven by and reflect...
Evaluation of streamflow extent and hydraulic characteristics of a restored channel at Soldier Meadows, Black Rock Desert–High Rock Canyon Emigrant Trails National Conservation Area, Nevada
Christopher M. Morris
2021, Scientific Investigations Report 2020-5143
The Soldier Meadows spring complex provides habitat for the desert dace, an endemic and threatened fish. The spring complex has been altered with the construction of irrigation ditches that remove water from natural stream channels. Irrigation ditches generally provide lower quality habitat for the desert dace. Land and wildlife...
Modeling water temperature response to dam operations and water management in Green Peter and Foster Lakes and the South Santiam River, Oregon
Annett B. Sullivan, Stewart A. Rounds
2021, Scientific Investigations Report 2020-5145
Significant FindingsGreen Peter and Foster Dams have altered natural seasonal temperature patterns in the South and Middle Santiam Rivers of the Willamette River Basin in northwestern Oregon. Cold-water releases from Green Peter Dam, upstream of Foster Lake, contribute to the cool-water conditions at Foster Dam. In summer, unseasonably cold...
Climate change implications for the conservation of amphibians in tropical environments.
Jaime A. Collazo, Adam Terando, Krishna Pacifici, Jared Bowden
2021, Report
The U.S. Fish and Wildlife Service and the Puerto Rico Department of Natural and Environmental Resources want to develop a plan of actions to protect 12 species of coqui frogs (Eleutherodactylus spp.) that are currently considered at risk of being considered threatened or endangered, requiring additional protections under the Endangered...
Dynamics of the seasonal migration of Round Goby (Neogobius melanostomus, Pallas 1814) and implications for the Lake Ontario food web
Chris Pennuto, Knut Mehler, Brian Weidel, Brian F. Lantry, Eric Bruestle
2021, Ecology of Freshwater Fish (30) 151-161
Seasonal migrations of fish populations can have large effects on lake nutrient budgets and food web dynamics, but the addition of a migrating non‐native species may alter these dynamics. The Round Goby (Neogobius melanostomus) arrived in Lake Ontario (USA/Canada) about 20 years ago with a documented history of annual offshore–inshore migrations...
Sequestration of microfibers and other microplastics by green algae, Cladophora, in the US Great Lakes
Julie R. Peller, Meredith B. Nevers, Muruleedhara Byappanahalli, Cassie Nelson, Bharath Ganesh Babu, Mary Anne Evans, Eddie Kostelnik, Morgan Keller, Jenna Johnston, Sarah Shidler
2021, Environmental Pollution (276)
Daunting amounts of microplastics are present in surface waters worldwide. A main category of microplastics is synthetic microfibers, which originate from textiles. These microplastics are generated and released in laundering and are discharged by wastewater treatment plants or enter surface waters from other sources. The polymers that constitute many common synthetic...
Climate-mediated changes to linked terrestrial and marine ecosystems across the northeast Pacific coastal temperate rainforest margin
Allison L. Bidlack, Sarah Bisbing, Brian Buma, Heida Diefenderfer, Jason Fellman, William Floyd, Ian Giesbrecht, Amritpal Lally, Ken Lertzman, Steven Perakis, David Butman, David D'Amore, Sean W. Fleming, Eran W. Hood, Brianna K. Hunt, Peter Kiffney, Gavin McNicol, Brian Menounos, Suzanne E. Tank
2021, BioScience
Coastal margins are important areas of materials flux that link terrestrial and marine ecosystems. Consequently, climate-mediated changes to coastal terrestrial ecosystems and hydrologic regimes have high potential to influence nearshore ocean chemistry and food web dynamics. Research from tightly coupled, high-flux coastal ecosystems can advance understanding of terrestrial–marine links...
Microbial pathogens and contaminants of emerging concern in groundwater at an urban subsurface stormwater infiltration site
Jane R. de Lambert, James F. Walsh, Deanna P. Scher, Aaron D. Firnstahl, Mark A. Borchardt
2021, Science of the Total Environment (775)
Urban stormwater may contain a variety of pollutants, including viruses and other pathogens, and contaminants of emerging concern (pharmaceuticals, artificial sweeteners, and personal care products). In vulnerable geologic settings, the potential exists for these contaminants to reach underlying aquifers and contaminate drinking water wells. Viruses and other pathogens, as well...
Computational methodology to analyze the effect of mass transfer rate on attenuation of leaked carbon dioxide in shallow aquifers
Radek Fucik, Jakub Solovsky, Michelle R. Plampin, Hao Wu, Jiri Mikyska, Tissa H. Illangasekare
2021, Acta Polytechnica (61)
Exsolution and re-dissolution of CO2 gas within heterogeneous porous media are investigated using experimental data and mathematical modeling. In a set of bench-scale experiments, water saturated with CO2 under a given pressure is injected into a 2-D water-saturated porous media system, causing CO2 gas to exsolve and migrate upwards. A layer of fine...
Big runs of little fish: First estimates of run size and exploitation in an amphidromous postlarvae fishery
A.C. Engman, Thomas J. Kwak, J.R. Fischer
2021, Canadian Journal Fisheries and Aquatic Sciences (78) 905-912
Amphidromous postlarvae fisheries (APFs) constitute a globally widespread and distinctive class of fishery that is largely unknown to fisheries science. APFs harvest ocean-to-river migrating fishes at smaller sizes and younger ages than any other class of fishery. No quantitative estimates of run size and exploitation exist, which are needed to...
Multi-taxa database data dictionary
Elise Watson, Carlton J. Rochester, Chris W. Brown, Donn A. Holmes, Stacie A. Hathaway, Robert N. Fisher
2021, Techniques and Methods 16-B1
The conservation of biological resources relies on the successful management of ecological and physiological research data. The Western Ecological Research Center of the U.S. Geological Survey is working with researchers, land managers, and decision makers from non-government organizations and city, county, state, and federal resource agencies to develop data...
Environmental and anthropogenic drivers of contaminants in agricultural watersheds with implications for land management
Kelly L. Smalling, Olivia Devereux, Stephanie E. Gordon, Patrick J. Phillips, Vicki S. Blazer, Michelle L. Hladik, Dana W. Kolpin, Michael T. Meyer, Adam Sperry, Tyler Wagner
2021, Science of the Total Environment (774)
If not managed properly, modern agricultural practices can alter surface and groundwater quality and drinking water resources resulting in potential negative effects on aquatic and terrestrial ecosystems. Exposure to agriculturally derived contaminant mixtures has the potential to alter habitat quality and negatively affect fish and other aquatic organisms. Implementation of...
Using high resolution satellite and telemetry data to track flooded habitats, their use by waterfowl, and evaluate effects of drought on waterfowl and shorebird bioenergetics in California
Elliott Matchett, Matthew Reiter, Cory T. Overton, Dennis Jongsomjit, Michael L. Casazza
2021, Open-File Report 2020-1102
Wetland managers in the Central Valley of California, a dynamic hydrological landscape, require information regarding the amount and location of existing wetland habitat to make decisions on how to best use water resources to support multiple wildlife objectives, particularly during drought. Scientists from the U.S. Geological Survey Western Ecological...
