Assessing spatial variability of nutrients, phytoplankton, and related water-quality constituents in the California Sacramento–San Joaquin Delta at the landscape scale—2018 high resolution mapping surveys
Brian A. Bergamaschi, Tamara E. C. Kraus, Bryan D. Downing, Elizabeth B. Stumpner, Katy O’Donnell, Jeffrey A. Hansen, Jeniffer Soto Perez, Emily T. Richardson, Angela M. Hansen, Alan Gelber
2024, Scientific Investigations Report 2023-5060
Executive Summary This study examined the abundance and distribution of nutrients and phytoplankton in the tidal aquatic environments of the Sacramento–San Joaquin Delta (Delta) and Suisun Bay, comprising three spatial surveys conducted in May, July, and October of 2018 that used continuous underway high frequency sampling and measurements onboard a...
Can cover crops help grassland-breeding birds? Corn Belt Insights from Iowa
Adam K. Janke, Taylor R. Shirley, Maggie Figura, Joshua D. Stafford
2024, Report
No abstract available....
Factors associated with Paddlefish (Polyodon spathula) restoration success in Oklahoma
Ryan A. Gary, James M. Long, Brian T. Eachus, Andrew R. Dzialowski, Jason D. Schooley
2024, Fisheries Management and Ecology (31)
The Paddlefish (Polyodon spathula) has been extirpated from portions of its native range due to anthropogenic habitat degradation and fragmentation, most notably the impoundment of rivers. To mitigate some of these losses in Oklahoma, Paddlefish have been stocked into reservoirs throughout the state, with variable success in establishing self-sustaining populations. Two...
The Ecosystem Approach in the 21st century: Guiding science and management – A synthesis
S.A. Ludsin, Andrew Kenneth Carlson, A.T. Duncan, C.M. Febria, J.H. Hartig, W.A. Kellogg, C.K. Minns, M. Munawar, S. Nolan, M. Van der Knaap, E.M. Verhamme, K.C. Williams
2024, Aquatic Ecosystem Health & Management (27) 108-116
Maintaining the integrity and health of aquatic ecosystems is critical to sustaining the many valued services that they provide society. Unfortunately, achieving this goal has proven challenging in most of the world's large ecosystems owing to rampant environmental change caused by human-driven stress, including accelerating climate change, pollution of waterways,...
Fishes move to transient local refuges, not persistent landscape refuges during river drying experiment
Thomas P Archdeacon, Eric J. Gonzales, Charles Yackulic
2024, Freshwater Biology (69) 792-808
Anthropogenically driven flow intermittency is increasing in freshwater streams, with important implications for the management and conservation of aquatic ecosystems. Because most freshwater fishes are mobile, they are expected to emigrate from intermittent reaches, but this may not be true in streams transitioning from perennial to intermittent. Here, we...
Characterizing structure in southern Summer Lake valley, Oregon using ground- and sUAS-based potential field geophysics
Tait E. Earney, Jonathan M.G. Glen
2024, Conference Paper
Summer Lake is located in south-central Oregon at the extreme northwestern extent of the Basin and Range Province, bordered by the Cascade Volcanic Province to the west and the High Lava Plains to the north. The valley hosts numerous hot springs and a small geothermal powerplant at the southeastern end...
Serologic survey of selected arthropod-borne pathogens in free-ranging snowshoe hares (Lepus americanus) captured in Northern Michigan, USA
Erik K. Hofmeister, Eric Clark, Melissa Lund, Daniel A. Grear
2024, Journal of Wildlife Diseases (60) 375-387
Snowshoe hares (Lepus americanus) in the Upper Peninsula (UP) of Michigan, USA, occupy the southern periphery of the species' range and are vulnerable to climate change. In the eastern UP, hares are isolated by the Great Lakes, potentially exacerbating exposure to climate-change-induced habitat alterations. Climate change is also measurably affecting...
A Robot Operating System (ROS) package for mapping flow fields in rivers via Particle Image Velocimetry (PIV)
Carl J. Legleiter, Michael Dille
2024, Software X (26)
Non-contact, remote sensing approaches to measuring flow velocities in river channels are widely used, but typical workflows involve acquiring images in the field and then processing data later in the office. To reduce latency between acquisition and output, with the ultimate goal of enabling real-time image velocimetry, we developed a...
Estimating migration timing and abundance in partial migratory systems by integrating continuous antenna detections with physical captures
Maria C. Dzul, William L. Kendall, Charles Yackulic, D.R. Van Haverbeke, P. Mackinnon, K. Young, M. Pillow, Joseph E Thomas
2024, Journal of Animal Ecology (93) 796-811
Many populations migrate between two different habitats (e.g. wintering/foraging to breeding area, mainstem–tributary, river–lake, river–ocean, river–side channel) as part of their life history. Detection technologies, such as passive integrated transponder (PIT) antennas or sonic receivers, can be placed at boundaries between habitats (e.g. near the confluence of rivers) to...
Triangle Area Water Supply Monitoring Project, North Carolina—Overview of hydrologic and water-quality monitoring activities and data quality assurance
J.C. Diaz, Rosemary Margaret Fanelli
2024, Open-File Report 2024-1003
Surface-water supplies are important sources of drinking water for residents in the Triangle area of North Carolina, which is located within the upper Cape Fear and Neuse River Basins. Since 1988, the U.S. Geological Survey and a consortium of local governments have participated in a cooperative effort, known as the...
Phytoplankton, taste-and-odor compounds, and cyanotoxin occurrence in four water-supply reservoirs in the Triangle area of North Carolina, April–October 2014
Celeste A. Journey, Anna M. McKee, Jessica C. Diaz
2024, Scientific Investigations Report 2024-5001
Prior to 2014, local utilities and State agencies monitored for cyanotoxins and taste-and-odor (T&O) compounds and reported occasional detections in three water-supply reservoirs in Wake County, North Carolina. Comparable data for cyanotoxins and T&O compounds were lacking for other water-supply reservoirs in the Triangle area of North Carolina. This report...
Cross-scale analysis reveals interacting predictors of annual and perennial cover in Northern Great Basin rangelands
Madelon Florence Case, Kirk W. Davies, Chad S. Boyd, Lina Aoyama, Joanna Merson, Calvin Penkauskas, Lauren M. Hallett
2024, Ecological Applications (0)
Exotic annual grass invasion is a widespread threat to the integrity of sagebrush ecosystems in Western North America. Although many predictors of annual grass prevalence and native perennial vegetation have been identified, there remains substantial uncertainty about how regional-scale and local-scale predictors interact to...
Design and calibration of a nitrate decision support tool for groundwater wells in Wisconsin, USA
Paul F. Juckem, Nicholas Corson-Dosch, Laura A. Schachter, Christopher Green, Kelsie M. Ferin, Eric G. Booth, Christopher J. Kucharik, Brian P. Austin, Leon J. Kauffman
2024, Environmental Modeling and Software, (176)
This paper describes development of a nitrate decision support tool for groundwater wells (GW-NDST) that combines nitrate leaching and groundwater lag-times to compute well concentrations. The GW-NDST uses output from support models that simulate leached nitrate, groundwater age distributions, and...
Modeling the potential spread of the non-native regal demoiselle, Neopomacentrus cyanomos, in the western Atlantic
Melanie M Esch, Catherine S. Jarnevich, Nuno Simoes, Timothy R McClanahan, Alastair R Harborne
2024, Coral Reefs (43) 641-653
Predicting the potential distribution of a non-native species can assist management efforts to mitigate impacts on recipient ecosystems. However, such predictions are lacking for marine species, such as the non-native regal demoiselle, Neopomacentrus cyanomos, that is currently expanding its distribution in the western Atlantic. We used correlative...
Status and trends of pelagic and benthic prey fish populations in Lake Michigan, 2023
David Warner, Ralph W. Tingley III, Charles P. Madenjian, Cory Brant, Steve A. Farha, Patricia Dieter, Benjamin A. Turschak, Dale Hanson, Kristy Phillips, Caleb Geister
2024, Report
Fall bottom trawl (fall BT) and lakewide acoustic (AC) surveys are conducted annually to generate indices of pelagic and benthic prey fish densities in Lake Michigan. The fall BT survey has been conducted each fall since 1973 using 12-m trawls at depths ranging from 9 to 110 m at fixed...
Simulating past and future fire impacts on Mediterranean ecosystems
Christoph Schworer, Cesar Morales-Molino, Erika Gobet, Paul D. Henne, Salvatore Pasta, Tiziana Pedrotta, Jacqueline F. N. van Leeuwen, Boris Vanniere, Willy Tinner
2024, Journal of Ecology (112) 954-970
Worldwide, large wildfires are becoming increasingly common, leading to economic damages and threatening ecosystems and human health. Under future climate change, more frequent fire disturbance may push ecosystems into non-forested alternative stable states. Fire-prone ecosystems such as those in the Mediterranean Basin are expected to be particularly vulnerable, but...
The roles of diet and habitat use in pesticide bioaccumulation by juvenile Chinook Salmon: Insights from stable isotopes and fatty acid biomarkers
Sara E. Anzalone, Neil W. Fuller, Kara E. Huff Hartz, Gregory W. Whitledge, Jason Tyler Magnuson, Daniel Schlenk, Shawn Acuña, Matt R. Whiles, Michael J. Lydy
2024, Archives of Environmental Contamination and Toxicology (86) 234-248
Stable isotopes (SI) and fatty acid (FA) biomarkers can provide insights regarding trophic pathways and habitats associated with contaminant bioaccumulation. We assessed relationships between SI and FA biomarkers and published data on concentrations of two pesticides [dichlorodiphenyltrichloroethane and degradation products (DDX) and bifenthrin] in juvenile Chinook...
Clumped isotopes record a glacial-interglacial shift in seasonality of soil carbonate accumulation in the San Luis Valley, southern Rocky Mountains, USA
Adam M. Hudson, Julia R. Kelson, James B. Paces, Chester A. Ruleman, Katharine W. Huntington, Andrew J. Schauer
2024, Geochemistry, Geophysics, Geosystems (25)
Clumped isotope paleothermometry using pedogenic carbonates is a powerful tool for investigating past climate changes. However, location-specific seasonal patterns of precipitation and soil moisture cause systematic biases in the temperatures they record, hampering comparison of data across large areas or differing climate states. To account for biases, more systematic studies...
Methane clumped isotopologue variability from ebullition in a mid-latitude lake
Ellen Jennifer Lalk, Amber Velez, Shuhei Ono
2024, ACS Earth and Space Chemistry (8) 689-701
Methane is a greenhouse gas and is an important component of carbon cycling in freshwater environments. Isotope ratios of methane (13C/12C and D/H) are used extensively as tracers to identify methane sources. Recent advances in the measurement of clumped methane isotopologues (13CH3D, 12CH2D2) offer new opportunities to constrain sources and sinks...
Potential impacts of an autumn oil spill on polar bears summering on land in northern Alaska
Ryan H. Wilson, Deborah French-Mckay, Craig J Perham, Susannah P. Woodruff, Todd C. Atwood, George M. Durner
2024, Biological Conservation (292)
Demand for oil and natural gas continues to increase, leading to the development of remote regions where it is riskier to operate. Many of these regions have had limited development, so understanding potential impacts to wildlife could inform management decisions....
Timing and source of recharge to the Columbia River Basalt groundwater system in northeastern Oregon
Henry M. Johnson, Kate E. Ely, Anna-Turi Maher
2024, Groundwater (62) 761-777
Recharge to and flow within the Columbia River Basalt Group (CRBG) groundwater flow system of northeastern Oregon were characterized using isotopic, gas, and age-tracer samples from wells completed in basalt, springs, and stream base flow. Most groundwater samples were late-Pleistocene to early-Holocene; median age of...
Inbuilt age, residence time, and inherited age from radiocarbon dates of modern fires and late Holocene deposits, Western Transverse Ranges, California
Katherine M. Scharer, Devin McPhillips, Jenifer Amy Leidelmeijer, Matthew Kirby
2024, Earth Surface Processes and Landforms (49) 2309-2582
Radiocarbon dates of sedimentary deposits include the elapsed time between formation of the organic material and deposition at the sample site, known as the inherited age. Long inherited ages reduce the accuracy of estimates of the timing of depositional events used to infer paleoclimate change, fire histories, and paleoearthquake...
Evaluation of the characteristics, discharge, and water quality of selected springs at Fort Irwin National Training Center, San Bernardino County, California
Jill N. Densmore, Drew C. Thayer, Meghan C. Dick, Peter W. Swarzenski, Lyndsay B. Ball, Celia Z. Rosecrans, Cordell Johnson
2024, Scientific Investigations Report 2023-5142
Eight springs and seeps at Fort Irwin National Training Center were described and categorized by their general characteristics, discharge, geophysical properties, and water quality between 2015 and 2017. The data collected establish a modern (2017) baseline of hydrologic conditions at the springs. Two types of springs were identified: (1) precipitation-fed...
Genetic Connectivity in the Arizona toad (Anaxyrus microscaphus): implications for conservation of a stream dwelling amphibian in the arid Southwestern U.S.
Sara J. Oyler-McCance, Mason J. Ryan, Brian K. Sullivan, Jennifer A. Fike, Robert S. Cornman, J. T. Giermakowski, Shawna J Zimmerman, R. L. Harrow, S.J. Hedwell, Blake R. Hossack, I. M. Latella, R. E. Lovish, S. Siefken, Brent H. Sigafus, Erin L. Muths
2024, Conservation Genetics (25) 835-848
The Arizona Toad (Anaxyrus microscaphus) is restricted to riverine corridors and adjacent uplands in the arid southwestern United States. As with numerous amphibians worldwide, populations are declining and face various known or suspected threats, from disease to habitat modification resulting from climate change. The Arizona Toad has been petitioned to...
Post-wildfire debris flows
Joseph Gartner, Jason W. Kean, Francis K. Rengers, Scott W. McCoy, Nina S. Oakley, Gary J. Sheridan
2024, Book chapter, Advances in Debris-flow Science and Practice
Post-wildfire debris flows pose severe hazards to communities and infrastructure near and within recently burned mountainous terrain. Intense heat of wildfires changes the runoff characteristics of a watershed by combusting the vegetative canopy, litter, and duff, introducing ash into the soil and creating water repellant soils. Following wildfire, rainfall on...
