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Preprints

Science Quality and Integrity

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Browse preprint publications authored by USGS scientists.

Filter Total Items: 51

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 Augustine, Patrick Ross Hutchins, Devin Nicole Jones-Slobodian, Jacob R. Williams, Eric Leinonen, Adam Sepulveda
By
Ecosystems Mission Area, Northern Rocky Mountain Science Center

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
By
Ecosystems Mission Area, Western Fisheries Research Center

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
By
Water Resources Mission Area, Idaho Water Science Center
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