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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
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Satellite tracking reveals heavy use of local MPAs by green turtles (Chelonia mydas) nesting in southeast Florida, USA Satellite tracking reveals heavy use of local MPAs by green turtles (Chelonia mydas) nesting in southeast Florida, USA
Florida hosts a regionally important nesting aggregation of green turtles (Chelonia mydas) in the North Atlantic, yet internesting and post-nesting movements for this rookery remain poorly understood. Here, we used satellite telemetry to track 23 green turtles nesting on southeast Florida beaches from 2017 to 2021 to investigate their spatial ecology and use of marine protected areas...
Authors
Glenn D. Goodwin, Kristen Hart, Abby C. Evans, Derek A. Burkholder
A scientific vision and roadmap for earthquake rupture forecast developments, a USGS perspective A scientific vision and roadmap for earthquake rupture forecast developments, a USGS perspective
We articulate a scientific vision and roadmap for the development of improved Earthquake Rupture Forecast models, which are one of the two main modeling components used in modern seismic hazard and risk analysis. One primary future objective is to provide fully time-dependent models that include both elastic rebound and spatiotemporal clustering nationwide, which is particularly...
Authors
Edward H. Field, Alexandra Elise Hatem, Bruce E. Shaw, Morgan T. Page, P. Martin Mai, Kevin Ross Milner, Andrea L. Llenos, Andrew J. Michael, Frederick Pollitz, Jessica Ann Thompson Jobe, Thomas E. Parsons, Olaf Zielke, David R. Shelly, Alice-Agnes Gabriel, Devin McPhillips, Richard W. Briggs, Elizabeth S. Cochran, Nico Luco, Mark D. Petersen, Peter M. Powers, Justin Rubinstein, Allison Shumway, Nicholas van der Elst, Yuehua Zeng, Christopher DuRoss, Jason M. Altekruse
Fish composition in a complex freshwater estuary: Environmental DNA metabarcoding versus capture surveys Fish composition in a complex freshwater estuary: Environmental DNA metabarcoding versus capture surveys
Objective The potential for environmental DNA (eDNA) to disperse widely from source organisms enables high detection efficiency but raises questions about eDNA's ability to differentiate fine-scale spatial patterns relative to conventional fish capture data.Methods We evaluate these questions in the St. Louis River estuary—a hydrologically and spatially complex coastal system within Lake...
Authors
Anett S Trebitz, Joel C. Hoffman, Gregory S. Peterson, Chelsea I. Hatzenbuhler, Erik M. Pilgrim, Sara L. Okum, W. Lindsay Chadderton, Andrew J. Tucker, Nicholas Bogyo, Jared Thomas Myers
Disturbance is the primary determinant of food chain length when the top predator is constant Disturbance is the primary determinant of food chain length when the top predator is constant
Food chain length (FCL) is a primary determinant of food web structure and is hypothesized to be influenced by habitat size, productivity, and disturbance. Understanding the environmental characteristics that determine food chain length can assist in understanding how food webs may be impacted due to changes in habitats and environmental characteristics. This study examines the impact of
Authors
Sarah F. Sorensen, Daniel D. Magoulick
Comparison of creek and bay influences on salt marsh sediment budget and deposition patterns Comparison of creek and bay influences on salt marsh sediment budget and deposition patterns
The resilience of salt marshes with low organic production depends on their effective capture and retention of mineral sediment from adjacent waters. Little prior work has directly compared mechanisms of sediment import from wave-influenced marsh boundaries against those of tidal creeks. We used simultaneous deployment of net-deposition tiles and oceanographic sensors to identify the...
Authors
Lukas T. WinklerPrins, Jessica R. Lacy, Mark T. Stacey, Karen M. Thorne, McKenna Leigh Bristow, Scott Jones
Perfluorodecanoic acid (PFDA) disrupts immune regulation via the toll-like receptor signaling pathway in zebrafish Perfluorodecanoic acid (PFDA) disrupts immune regulation via the toll-like receptor signaling pathway in zebrafish
As there are a growing number of per- and polyfluoroalkyl substances (PFAS) alternative substitutes applied globally, it remains paramount to characterize their potential health risks. Perfluorodecanoic acid (PFDA) is the most common alternative PFAS detected in the environment; however, its toxic effects and underlying mechanism of action to aquatic biota remains unclear. In this study...
Authors
Jiazhen Wang, Di Fang, Jason Tyler Magnuson, Bentuo Xu, Chunmiao Zheng, Liang Tang, Wenhui Qiu
Long‐term regime shifts in xeric ecoregion freshwater fish assemblages due to Anthropogenic and climate stressors Long‐term regime shifts in xeric ecoregion freshwater fish assemblages due to Anthropogenic and climate stressors
Shifting climate regimes are projected to increase the area of xeric regions and result in more pronounced intermittency across river networks. Given these projected changes, we aim to understand the factors contributing to species persistence under increasing aridity. To investigate how changing flow regimes are related to changes in fish richness and assemblage composition, we compiled...
Authors
Corey A. Krabbenhoft, Jane S. Rogosch, Freya Elizabeth Rowland
Melt generation sources and conditions in the wake of a migrating slab window: Geochemistry and petrology of the million-year history of primitive volcanism at Clear Lake volcanic field, California Melt generation sources and conditions in the wake of a migrating slab window: Geochemistry and petrology of the million-year history of primitive volcanism at Clear Lake volcanic field, California
Clear Lake volcanic field (CLVF) is the northernmost and youngest (~2.2 Ma to 8 ka) of the volcanic centers distributed along the San Andreas transform fault in western California. The initial phase of CLVF volcanism (interval one) occurred between ~2.2 and 1.3 Ma and extends ~35 km southeast of Clear Lake, forming a semi-continuous upland plateau capped by lava flows, with isolated...
Authors
Dawnika L. Blatter, Seth D. Burgess
A spatiotemporal deep learning approach for predicting daily air-water temperature signal coupling and identification of key watershed physical parameters in a montane watershed A spatiotemporal deep learning approach for predicting daily air-water temperature signal coupling and identification of key watershed physical parameters in a montane watershed
Seasonal shifts from runoff to groundwater dominance influence daily headwater stream temperatures, especially where local groundwater input is strong. This input buffers temperature during hot periods, supporting cold-water habitats. Recent studies use air–water temperature signal metrics to identify zones of strong stream–groundwater connectivity. While Previous studies used air–water...
Authors
Mohammad Reza M. Behbahani, David M. Rey, Martin A. Briggs, Amvrossios Bagtzoglou
3D habitat complexity and coral morphology modulate reef fish functional structure in a marine national park 3D habitat complexity and coral morphology modulate reef fish functional structure in a marine national park
The ongoing degradation of coral reef habitats is widely acknowledged to have adverse effects on the abundance and diversity of reef fish populations, yet the direct effects on ecosystem functions remain uncertain. This study used a quantitative approach to determine the mechanistic links between fish assemblages and ecological function. We investigated the effects of 3D habitat...
Authors
Sofia B. Ferreira, John H.R. Burns, Atsuko Fukunaga, Lillian Joy Tuttle Raz, Sheila A. McKenna, Kailea Annandale, Ryan J. Monello
Refining PAH and PCB bioavailability predictions in industrial sediments using source-fingerprinting, particle size, and bulk carbon, Puget Sound, Washington Refining PAH and PCB bioavailability predictions in industrial sediments using source-fingerprinting, particle size, and bulk carbon, Puget Sound, Washington
Nearshore marine sediments in a Puget Sound, Washington industrial embayment had elevated levels of PAHs, PCBs and DDTs. Chemical fingerprints implicated nearshore sources including creosote, industrial oil and tar waste, and a landfill. Elevated concentrations were confined to an approximate 300-m shoreline buffer in the industrial waterfront, suggesting high site fidelity and limited...
Authors
Kathleen Conn, Andrew R. Spanjer, Renee Takesue
Induced earthquakes are generally not tidally triggered in Oklahoma and Kansas Induced earthquakes are generally not tidally triggered in Oklahoma and Kansas
Human-induced earthquakes occur along critically stressed faults as injected wastewater simultaneously heightens fluid pressure and pushes faults to failure. We investigate the possibility that small stresses imposed by Earth tides could trigger earthquakes in the induced seismicity region of Oklahoma and Kansas from 2011 to 2018. We decluster a catalog consisting of ∼110,000 earthquakes...
Authors
Margaret Elizabeth Glasgow, Justin Rubinstein, Jeanne L. Hardebeck