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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.
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.
Filter Total Items: 91
Mapping eelgrass cover and biomass at Izembek Lagoon, Alaska, using in-situ field data and Sentinel-2 satellite imagery Mapping eelgrass cover and biomass at Izembek Lagoon, Alaska, using in-situ field data and Sentinel-2 satellite imagery
Two eelgrass (Zostera marina) maps of Izembek Lagoon, Alaska, were generated by first creating maps of spectrally unique classes from each of two Sentinel-2 satellite images collected on July 1, 2016, and August 14, 2020, then attributing the spectral classes with information about eelgrass conditions based on field data. Maps depicting various eelgrass metrics, such as percent cover and...
Authors
David C. Douglas, Michael D. Fleming, Vijay P. Patil, David H. Ward
Estimating species-specific U.S. waterfowl harvest Estimating species-specific U.S. waterfowl harvest
The U.S. Fish and Wildlife Service monitors species-specific waterfowl (ducks, seaducks, geese, and brant) harvest through two hunter surveys, one that estimates the total harvest for each waterfowl group, and a second that estimates the species composition of each waterfowl group. Point estimates for species-specific harvest can be computed by multiplying the estimated total harvest by...
Authors
Ben C. Augustine, J. Andrew Royle
Sero-epidemiology of Highly Pathogenic Avian Influenza viruses among wild birds in subarctic intercontinental transition zones 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...
Authors
Jonathon D. Gass, 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, Halldor Palmar Halldorsson, Jon Einar Jonsson, Alexa D. Simulynas, Felicia B. Nutter, Wendy B. Puryear, Jonathan A. Runstadler
Assessing the sustainability of Pacific walrus harvest in a changing environment 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...
Authors
Devin Johnson, Joseph Michael Eisaguirre, Rebecca L. Taylor, Erik Andersen, Joel Garlich-Miller
A hierarchical model for eDNA fate and transport dynamics accommodating low concentration samples A hierarchical model for eDNA fate and transport dynamics accommodating low concentration samples
Environmental DNA (eDNA) sampling is an increasingly important tool for answering ecological questions and informing aquatic species management; however, several factors currently limit the reliability of ecological inference from eDNA sampling. Two particular challenges are 1) determining species source location(s) and 2) accurately and precisely measuring low concentration eDNA samples...
Authors
Ben C. Augustine, Patrick Ross Hutchins, Devin Nicole Jones-Slobodian, Jacob R. Williams, Eric Leinonen, Adam J. Sepulveda
Structurally selective ozonolysis of p-phenylenediamines and toxicity in coho salmon and rainbow trout 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...
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 D. 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 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...
Authors
Christopher A. Mebane