Preprints
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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.
Browse preprint publications authored by USGS scientists.
New technology for an ancient fish: A lamprey life cycle modeling tool with an R Shiny application
Lampreys (Petromyzontiformes) are an ancient group of fishes with complex life histories. We created a life cycle model that includes an R Shiny interactive web application interface to simulate abundance by life stage. This will allow scientists and managers to connect available demographic information in a framework that can be applied to questions regarding lamprey biology and conservation. We
Authors
Dylan Gerald-Everett Gomes, Joseph R. Benjamin, Benjamin J. Clemens, Ralph Lampman, Jason B. Dunham
Examining inter-regional and intra-seasonal differences in wintering waterfowl landscape associations among Pacific and Atlantic flyways
The Central Valley of California (CVC) and Mid-Atlantic (MA) in the U.S. are both critical sites for nationwide food security (California Poultry Federation 2016, Prosser et al. 2017), and many waterfowl species annually, especially during the winter, providing feeding and roosting locations for a variety of species. Mapping waterfowl distributions, using NEXRAD, may aid in the adaptive management
Authors
Matthew J. Hardy, Christopher K. Williams, Brian S. Ladman, Maurice E. Pitesky, Cory T. Overton, Michael L. Casazza, Elliott Matchett, Diann Prosser, Jeffrey J. Buler
Managing water for birds— A tool for the Malheur National Wildlife Refuge
The “Water for Birds Tool” is an Excel-based model designed for resource managers to assess the spatial extent and types of bird habitats in the Malheur National Wildlife Refuge. The model quantifies the area of open water, partial water, and water depths on a monthly timescale during the irrigation season (April–July) from 2021–2024. This model combines previously published datasets and incorpora
Authors
Cassandra Smith
Distinguishing natural sources from anthropogenic noise in seismic data
No abstract available.
Authors
Sean Maher, Margaret Elizabeth Glasgow, Elizabeth S. Cochran, Zhigang Peng
The extended Global Lake area, Climate, and Population (GLCP) dataset: Extending the GLCP to include ice, snow, and radiation-related climate variables
A changing climate and increasing human population necessitate understanding global freshwater availability. To enable assessment of lake water variability from local-to-global and monthly-to-decadal scales, we extended the Global Lake area, Climate, and Population (GLCP) dataset, which contains monthly lake surface area for 1.42 million lakes with paired basin-level climate and population data fr
Authors
Michael Frederick Meyer, Salvatore G.P. Virdis, Xiao Yang, Mattew R. Brousil, Ryan P. McClure, Sapna Sharma, R. Iestyn Woolway, Alli N. Cramer, Jianning Ren, Stephen L. Katz, Stephanie E. Hampton, Haoran Shi
Spatial variability of water temperature within the White River basin, Mount Rainier National Park Washington
Water temperature is a primary control on the occurrence and distribution of cold-water species. Rivers draining Mount Rainier in western Washington, including the White River along its northern flank, support several cold-water fish populations, but the spatial distribution of water temperatures, particularly during late-summer base flow between August and September, and the climatic, hydrologic,
Authors
Andrew Gendaszek, Anya Clare Leach, Kristin Jaeger
Sero-epidemiology of Highly Pathogenic Avian Influenza viruses among wild birds in subarctic intercontinental transition zones
Background: The geographic expansion and evolution of A/Goose/Guangdong/1/1996(H5N1) (Gs/GD) lineage H5Nx highly pathogenic avian influenza (HPAI) viruses since 1996 have raised awareness of enzootic circulation among migratory birds and the potential for intercontinental transport and spread. Recent Pacific- and Atlantic-route introductions of HPAI to North America were facilitated by avian migra
Authors
Jonathon D. Gass Jr., Robert J. Dusek, Nichola J. Hill, Laura Borkenhagen, Jeffrey S. Hall, Gunnar Thor Hallgrimsson, Mary Anne Bishop, Andrew M. Ramey, Timothy J. Spivey, Solvi Runar Vignisson, Sunna Bjork Ragnarsdottir, Halldór Pálmar Halldórsson, Jón Einar Jónsson, Alexa D. Simulynas, Felicia B. Nutter, Wendy B. Puryear, Jonathan A. Runstadler
Assessing the sustainability of Pacific walrus harvest in a changing environment
Harvest sustainability is a primary goal of wildlife management and conservation, and in a changing world it is increasingly important to consider environmental drivers of population dynamics alongside harvest in cohesive management plans. This is particularly pertinent for harvested species that are acutely experiencing effects of climate change. The Pacific walrus (Odobenus rosmarus divergens),
Authors
Devin Johnson, Joseph Michael Eisaguirre, Rebecca L. Taylor, Erik Andersen, Joel Garlich-Miller
Structurally selective ozonolysis of p-phenylenediamines and toxicity in coho salmon and rainbow trout
The tire rubber-derived ozonation product of N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine (6PPD), N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine-quinone (6PPD-Q), was recently discovered to cause acute mortality in Coho Salmon (Oncorhynchus kisutch). para-Phenylenediamines (PPDs) with variable side chains distinct from 6PPD have been identified as potential replacement commercial antioxi
Authors
Linna Xie, Jie Yu, Pranav Nair, Jianxian Sun, Holly Barrett, Oliver Meek, Xing Qian, Diwen Yang, Lisa V. Kennedy, Derek Kozakiewicz, Chunyan Hao, John Hansen, Justin Blaine Greer, Jonathan P.D. Abbatt, Hui Peng
The protectiveness of aquatic life criteria for threatened or endangered aquatic species: Cadmium in California
In the United States, conflicts can arise between the processes to derive aquatic life criteria (ALC) for chemicals under the Clean Water Act (CWA) and the evaluation procedures used in Endangered Species Act (ESA) consultations on the protectiveness of those criteria for protected species. This paper examines the roots of, and possible reconciliation of, one longstanding conflict over cadmium aqu
Authors
Christopher A. Mebane