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Browse more than 160,000 publications authored by our scientists over the past 100+ year history of the USGS.  Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.

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We are focused on some of the most significant issues society faces, and our science is making a substantial contribution to the well-being of the Nation and the world. Learn more about the major topics our research covers and the programs focused on those topics.

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Assessing nonpoint-source uranium pollution in an irrigated stream-aquifer system Assessing nonpoint-source uranium pollution in an irrigated stream-aquifer system

Uranium (U) in rocks and soils of arid and semi-arid environments can be mobilized by irrigation and fertilization, posing environmental and health risks. Elevated U, along with selenium (Se) and nitrate (NO3) co-constituents, necessitates careful monitoring and management. We developed a distributed-parameter numerical model to assess U pollution in an irrigated stream-aquifer system...
Authors
Ibraheem A. Qurban, Timothy K. Gates, Eric D. Morway, John T. Cox, Jeremy T. White, Ryan T. Bailey, Michael N. Fienen
By
Nevada Water Science Center

Origins and fluxes of gas emissions from the Central Volcanic Zone of the Andes Origins and fluxes of gas emissions from the Central Volcanic Zone of the Andes

We present geochemical data from gas samples from ∼1200 km of arc in the Central Volcanic Zone of the Andes (CVZA), the volcanic arc with the thickest (∼70 km) continental crust globally. The primary goals of this study are to characterize and understand how magmatic gases interact with hydrothermal systems, assess the origins of the major gas species, and constrain gas emission rates...
Authors
J. Maarten de Moor, Peter Barry, Alejandro Rodriguez, Felipe Aguilera, Mauricio Aguilera, Cristobal Gonzalez, Susana Layana, Agostina Chiodi, Fredy Apaza, Pablo Masias, Christoph Kern, Jaime D. Barnes, Jeffrey T. Cullen, Deborah Bastoni, Alessia Bastianoni, Martina Cascone, Christofer Jimenez, Jessica Salas-Navarro, Carlos Ramirez, Gerdhard Jessen, Donato Giovannelli, Karen Lloyd
By
Volcano Hazards Program, Volcano Science Center

Canopy and surface fuels measurement using terrestrial lidar single-scan approach in the Mogollon highlands of Arizona Canopy and surface fuels measurement using terrestrial lidar single-scan approach in the Mogollon highlands of Arizona

Background Fuel monitoring data are essential to evaluate wildfire risk, plan management activities and evaluate fuel treatment effects. Terrestrial light detection and ranging (lidar) is a field-based 3D scanning technology with great potential to reduce labor-intensive field measurements and provide new depths of vegetation structure data. Aims To facilitate the integration of...
Authors
Johnathan T. Tenny, Temuulen Tsagaan Sankey, Seth M. Munson, Andrew J. Sánchez Meador, Scott J. Goetz
By
Ecosystems Mission Area, Southwest Biological Science Center

Diamondback terrapin resource use in a seagrass-dominated coastal bay varies by life stage Diamondback terrapin resource use in a seagrass-dominated coastal bay varies by life stage

Diamondback terrapins, hereafter referred to as terrapins, are the only estuarine turtle species native to North America. However, terrapins are also occasionally found in marine habitats, such as seagrass beds, and yet little is known about how they use those marine habitats. We sampled epidermis from terrapins (Malaclemys terrapin macrospilota) inhabiting a seagrass-dominated coastal...
Authors
Margaret Lamont, Carson L. Arends, Daniel J. Catizone, Hannah B. Vander Zanden
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Black abalone (Haliotis cracherodii) population density, recruitment, size structure, and population growth at Naval Base Ventura County, San Nicolas Island, California, 2013–22 Black abalone (Haliotis cracherodii) population density, recruitment, size structure, and population growth at Naval Base Ventura County, San Nicolas Island, California, 2013–22

The range of the endangered black abalone (Haliotis cracherodii) is divided into the North Central California region, the Central California region, the Southern California Mainland region, the Channel Islands region, and the Baja California region by the National Marine Fisheries Service for management purposes. San Nicolas Island is one of eight subregions of the Channel Islands region...
Authors
Michael C. Kenner, Julie L. Yee
By
Ecosystems Mission Area, Western Ecological Research Center (WERC)

Multi-model comparison of salt marsh longevity under relative sea-level rise Multi-model comparison of salt marsh longevity under relative sea-level rise

Understanding salt marsh resilience under increasing sea levels can inform for management decisions. We compared temporal projections from various wetland process-based models and a geospatially derived metric (i.e., marsh lifespan) to understand key considerations and uncertainties about salt marsh resilience when using these products for decision-making. The influences of lidar...
Authors
Melinda Martinez, Kevin J. Buffington, Neil K. Ganju, Zafer Defne, Kate Ackerman, Karen M. Thorne, Glenn R. Guntenspergen, Joel A. Carr
By
Chesapeake Bay Activities, Eastern Ecological Science Center
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