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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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A dataset of amphibian species in U.S. National Parks A dataset of amphibian species in U.S. National Parks

National parks and other protected areas are important for preserving landscapes and biodiversity worldwide. An essential component of the mission of the United States (U.S.) National Park Service (NPS) requires understanding and maintaining accurate inventories of species on protected lands. We describe a new, national-scale synthesis of amphibian species occurrence in the NPS system...
Authors
Benjamin Lafrance, Andrew M. Ray, Robert N. Fisher, Evan H. Campbell Grant, Charles Shafer, David Beamer, Stephen Frank Spear, Todd W Pierson, Jon M. Davenport, Matthew L. Niemiller, R. Alexander Pyron, Brad M. Glorioso, William Barichivich, Brian J. Halstead, Kory Roberts, Blake R. Hossack

Slope Unit Maker (SUMak): An efficient and parameter-free algorithm for delineating slope units to improve landslide modeling Slope Unit Maker (SUMak): An efficient and parameter-free algorithm for delineating slope units to improve landslide modeling

Slope units are terrain partitions bounded by drainage and divide lines. In landslide modeling, including susceptibility modeling and event-specific modeling of landslide occurrence, slope units provide several advantages over gridded units, such as better capturing terrain geometry, improved incorporation of geospatial landslide-occurrence data in different formats (e.g., point and...
Authors
Jacob Bryson Woodard, Benjamin B. Mirus, Nathan J. Wood, Kate E. Allstadt, Ben Leshchinsky, Matthew Crawford

Global potential distribution of mangroves: Taking into account salt marsh interactions along latitudinal gradients Global potential distribution of mangroves: Taking into account salt marsh interactions along latitudinal gradients

Mangrove is one of the most productive and sensitive ecosystems in the world. Due to the complexity and specificity of mangrove habitat, the development of mangrove is regulated by several factors. Species distribution models (SDMs) are effective tools to identify the potential habitats for establishing and regenerating the ecosystem. Such models usually include exclusively environmental...
Authors
Lina Cui, Don DeAngelis, Uta Berger, Minmin Cao, Yaqi Zhang, Xiaomin Zhang, Jiang Jiang

Estimating lithium concentrations in groundwater used as drinking water for the conterminous United States Estimating lithium concentrations in groundwater used as drinking water for the conterminous United States

Lithium (Li) concentrations in drinking-water supplies are not regulated in the United States; however, Li is included in the 2022 U.S. Environmental Protection Agency list of unregulated contaminants for monitoring by public water systems. Li is used pharmaceutically to treat bipolar disorder, and studies have linked its occurrence in drinking water to human-health outcomes. An extreme...
Authors
Melissa A. Lombard, Eric E. Brown, Daniel Saftner, Monica M. Arienzo, Esme Fuller-Thomson, Craig J. Brown, Joseph D. Ayotte

Rapid estimation of single-station earthquake magnitudes with machine learning on a global scale Rapid estimation of single-station earthquake magnitudes with machine learning on a global scale

The foundation of earthquake monitoring is the ability to rapidly detect, locate, and estimate the size of seismic sources. Earthquake magnitudes are particularly difficult to rapidly characterize because magnitude types are only applicable to specific magnitude ranges, and location errors propagate to substantial magnitude errors. We developed a method for rapid estimation of single...
Authors
Sydney Dybing, William L. Yeck, Hank M. Cole, Diego Melgar

Mass-balance-consistent geological stock accounting: A new approach toward sustainable management of mineral resources Mass-balance-consistent geological stock accounting: A new approach toward sustainable management of mineral resources

Global resource extraction raises concerns about environmental pressures and the security of mineral supply. Strategies to address these concerns depend on robust information on natural resource endowments, and on suitable methods to monitor and model their changes over time. However, current mineral resources and reserves reporting and accounting workflows are poorly suited for...
Authors
Mark U. Simoni, Johannes A. Drielsma, Magnus Ericsson, Andrew G. Gunn, Sigurd Heiberg, Tom A. Heldal, Nedal T. Nassar, Evi Petavratz, Daniel B. Muller

Identifying conditions where reed canarygrass (Phalaris arundinacea) functions as a driver of forest loss in the Upper Mississippi River floodplain under different hydrological scenarios Identifying conditions where reed canarygrass (Phalaris arundinacea) functions as a driver of forest loss in the Upper Mississippi River floodplain under different hydrological scenarios

Most of the world’s river-floodplain ecosystems are simultaneously undergoing modifications to their hydrological regimes and experiencing species invasions, making it unclear whether invasive species are the main drivers of ecosystem change or simply responding to changes in the hydrological regime. We simulated patterns of forest recruitment and succession in a 2500-ha portion of the...
Authors
Nathan R. De Jager, Jason J. Rohweder, Molly Van Appledorn, Enrika Hlavacek, Andy Meier

Slowly but surely: Exposure of communities and infrastructure to subsidence on the US east coast Slowly but surely: Exposure of communities and infrastructure to subsidence on the US east coast

Coastal communities are vulnerable to multihazards, which are exacerbated by land subsidence. On the US east coast, the high density of population and assets amplifies the region's exposure to coastal hazards. We utilized measurements of vertical land motion rates obtained from analysis of radar datasets to evaluate the subsidence-hazard exposure to population, assets, and infrastructure...
Authors
Leonard O. Ohenhen, Manoochehr Shirzaei, Patrick L. Barnard

K-12 trade books’ representation of earthquake safety and protective actions: A content analysis K-12 trade books’ representation of earthquake safety and protective actions: A content analysis

Meaningful learning resources for earthquake safety and survival have become an increasingly important topic among geoscientists, especially educators and researchers. Various members of the public, especially K-12 (ages 5–18) learners, continue to depend on scientific trade books available at their local public and school libraries for information about earthquake concepts. To our...
Authors
Samuel Nyarko, Danielle F. Sumy, Sara K. McBride

Broad scale community-level larval fish survey of southern Lake Erie Broad scale community-level larval fish survey of southern Lake Erie

The early-life history stages of fish are sensitive to environmental change and therefore can indicate habitat quality as well as help predict recruitment of resident and transient fishes. In 2019, as part of the Lake Erie Cooperative Science and Monitoring Initiative, we conducted a lake-wide assessment of the ichthyoplankton community in U.S. nearshore waters and international offshore...
Authors
Robin L. DeBruyne, Zachary A. Amidon, Matthew Joseph Angelosanto, Emily Ann Eberly, Dimitry Gorsky, Stacey Ireland, Christine M. Mayer, Stacy Provo, Haley VanScoyoc, James M. Watkins, Edward F. Roseman

Investigating the atmospheric conditions associated with impactful shallow landslides in California (USA) Investigating the atmospheric conditions associated with impactful shallow landslides in California (USA)

Shallow landslides are often triggered during rainfall events, which can increase subsurface soil water pressure and destabilize hillslopes. The likelihood of regional shallow landslide initiation is often assessed through a comparison of rainfall intensity and duration to pre-established thresholds. While informative for landslide warning, this exclusive focus on rainfall exceeding...
Authors
Nina S. Oakley, Jonathan P. Perkins, Samuel M. Bartlett, Brian D. Collins, Karimah Halona Comstock, Dianne L. Brien, W.P. Burgess, Skye C. Corbett

What can conservation culturomics tell us about factors driving public interest in aquatic endangered species What can conservation culturomics tell us about factors driving public interest in aquatic endangered species

The field of “Conservation Culturomics” uses large datasets of freely available web-data to understand cultural patterns and public interests related to conservation topics. We used a popular culturomics tool based on search engine usage to investigate how the U.S. Endangered Species Act listing actions may influence public interest in imperiled freshwater taxa. Yet questions remain...
Authors
Michael J. Moore, A. A Hyman
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