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Browse more than 65,000 articles authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.

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Global survey of paleo-bedforms on Mars Global survey of paleo-bedforms on Mars

Sedimentary processes on Mars have contributed to a plethora of landforms, both ancient and modern. Many of these are aeolian- or fluvial-formed constructs that meet the morphologic criteria for dunes and ripples but are clearly lithified and part of the rock record. This study conducted a survey of Mars using data returned from the High Resolution Imaging Science Experiment (HiRISE) to
Authors
Matthew Chojnacki, Lori K. Fenton, Lauren A. Edgar, Mackenzie D. Day, Christopher S. Edwards, Aaron R Weintraub, Amber L. Gullikson, Matt Telfer

Cross-shore hydrodynamics and morphodynamics modeling of an erosive event in the inner surf zone Cross-shore hydrodynamics and morphodynamics modeling of an erosive event in the inner surf zone

The phase-averaged and depth-integrated coastal morphodynamic model, XBeach-Surfbeat, was investigated for its capability of predicting the cross-shore hydrodynamics and morphodynamics in the inner surf zone by simulating the storm-induced berm erosion, sediment transport, and subsequent sand bar formation. By utilizing a comprehensive hydrodynamic and morphodynamic dataset measured in a...
Authors
Jiaye Zhang, Benjamin Tsai, Yashar Rafati, Tian-Jian Hsu, Jack A. Puleo

From exploration to production: Understanding the development dynamics of lithium mining projects From exploration to production: Understanding the development dynamics of lithium mining projects

Recently, there has been considerable recent controversy whether current and new lithium mines will be able to supply the rapidly growing needs of the electromobility transition. Mineral exploration projects are typically active for many years, and only some become operational mines. From exploration to production, the projects go through several stages of characterisation and evaluation...
Authors
Laura Buarque, Max Frenzel, Britta Bookhagen, Carolin Kresse, Michael Schmidt, Nedal T. Nassar, Elisa Alonso, Ensieh Shojaeddini, Dirk Sandmann

Predicted exposure of communities in southeastern United States to climate-related coastal hazards Predicted exposure of communities in southeastern United States to climate-related coastal hazards

A rigorous analysis of 21st Century multi-hazard exposure for U.S. Southeast Atlantic coastal communities indicates that up to 70% of residents will be exposed daily to shallow and emerging groundwater by ~2100, 15 times higher than from surficial flooding alone. This threat further exacerbates other coastal stressors, such as flooding, subsidence, and beach erosion, that impact these...
Authors
Patrick L. Barnard, Peter W Swarzenski

Limited preservation of strike-slip surface displacement in the geomorphic record Limited preservation of strike-slip surface displacement in the geomorphic record

Offset geomorphic markers are commonly used to interpret slip history of strike-slip faults and have played an important role in forming earthquake recurrence models. These data sets are typically analyzed using cumulative probability methods to interpret average amounts of slip in past earthquakes. However, interpretation of the geomorphic record to infer surface slip history is...
Authors
Nadine G. Reitman, Yann Klinger, Richard W. Briggs, Ryan D. Gold

Identifying priority science information needs for managing public lands Identifying priority science information needs for managing public lands

Public lands worldwide provide diverse resources, uses, and values, ranging from wilderness to extractive uses. Decision-making on public lands is complex as a result and is required by law to be informed by science. However, public land managers may not always have the science they need. We developed a methodology for identifying priority science needs for public land management...
Authors
Sarah K. Carter, Travis Haby, Ella M. Samuel, Alison C. Foster, Jennifer K. Meineke, Laine E. McCall, Malia Burton, Chris Domschke, Leigh Espy, Megan A. Gilbert

Establishment of a cell culture from Daphnia magna as an in vitro model for (eco)toxicology assays: Case study using Bisphenol A as a representative cytotoxic and endocrine disrupting chemical Establishment of a cell culture from Daphnia magna as an in vitro model for (eco)toxicology assays: Case study using Bisphenol A as a representative cytotoxic and endocrine disrupting chemical

Bisphenol A (BPA) is a widely used industrial compound found in polycarbonate plastics, epoxy resin, and various polymer materials, leading to its ubiquitous presence in the environment. The toxicity of BPA to aquatic organisms has been well documented following in vivo exposure scenarios, with known cytotoxic and endocrine-disrupting effects. As such, BPA was used in this study as a...
Authors
Sreevidya CP, Manoj Kumar TM, Soumya Balakrishnana, Suresh Kunjiramana, Manomi Sarasan, Jason Tyler Magnuson, Jayesh Puthumana

Wintering grounds leave their mark: Where birds winter influences genomic structure in Arctic nesting common eiders Wintering grounds leave their mark: Where birds winter influences genomic structure in Arctic nesting common eiders

Information about the distribution of genomic variation within and between nesting locations of waterfowl can aid in defining populations and conservation plans and inform harvest management. Identification of locations where shifts in allelic diversity occur is particularly important for Arctic nesting species nesting, a region currently experiencing rapid change associated with climate...
Authors
Sarah A. Sonsthagen, Robert E. Wilson, Russell R. Turner, Marie-Josee Fortin, Grant Gilchrist, Vicki L. Friesen

Leveraging local wildlife surveys for robust occupancy trend estimation Leveraging local wildlife surveys for robust occupancy trend estimation

Natural resource agencies are frequently tasked with monitoring populations of at-risk species to ensure management activities do not negatively affect the viability of wildlife populations. Typically, these monitoring efforts evaluate trends in a population’s abundance, occupancy, or geographic distribution. Often, surveys provide local information, but results are generally not...
Authors
Jordan L. Heiman, Jody M. Tucker, Sarah Nelson Sells, Joshua J. Millspaugh, Michael K. Schwartz

Combining past and contemporary species occurrences with ordinal species distribution modeling to investigate responses to climate change Combining past and contemporary species occurrences with ordinal species distribution modeling to investigate responses to climate change

Many organisms leave evidence of their former occurrence, such as scat, abandoned burrows, middens, ancient eDNA or fossils, which indicate areas from which a species has since disappeared. However, combining this evidence with contemporary occurrences within a single modeling framework remains challenging. Traditional binary species-distribution modeling reduces occurrence to two...
Authors
Erik A. Beever, Marie L. Westover, Adam B. Smith, Francis D. Gerraty, Peter D. Billman, Felisa A. Smith

Asymmetric impacts of climate change on thermal habitat suitability for inland lake fishes Asymmetric impacts of climate change on thermal habitat suitability for inland lake fishes

Climate change is altering the thermal habitats of freshwater fish species. We analyze modeled daily temperature profiles from 12,688 lakes in the US to track changes in thermal habitat of 60 lake fish species from different thermal guilds during 1980-2021. We quantify changes in each species’ preferred days, defined as the number of days per year when a lake contains the species’...
Authors
Luoliang Xu, Zachary S. Feiner, Paul Frater, Gretchen J. A. Hansen, Robert Ladwig, Craig P. Paukert, Michael Verhoeven, Lyndsie Wszola, Olaf P. Jensen
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