Physical Sciences and Mathematics Commons^™

San Francisco Delta Risk Assessment Year 1 Report, Wayne G. Landis, Steven R. Eikenbary, Ethan A. Brown, Colter P. Lemons, Emma E. Sharpe, April J. Markiewicz

IETC Publications

The Relative Contributions of Contaminants to Environmental Risk in the Upper San Francisco Estuary: Progress Report Year 1

Prepared for: The Metropolitan Water District of Southern California

Prepared by: Wayne G. Landis, Steven R. Eikenbary, Ethan A. Brown, Colter P. Lemons, Emma E. Sharpe, and April J. Markiewicz

Institute of Environmental Toxicology, Huxley College of the Environment

Western Washington University

Bellingham, WA 98225

June 30, 2020

San Francisco Delta Risk Assessment Year 1 Report Appendices, Wayne G. Landis, Steven R. Eikenbary, Ethan A. Brown, Colter P. Lemons, Emma E. Sharpe, April J. Markiewicz

IETC Publications

The Relative Contributions of Contaminants to Environmental Risk in the Upper San Francisco Estuary: Progress Report Year 1: Appendices

Prepared for: The Metropolitan Water District of Southern California

Prepared by: Wayne G. Landis, Steven R. Eikenbary, Ethan A. Brown, Colter P. Lemons, Emma E. Sharpe, and April J. Markiewicz

Institute of Environmental Toxicology, Huxley College of the Environment

Western Washington University

Bellingham, WA 98225

June 30, 2020

San Francisco Delta Risk Assessment Year 1 Report & Appendices, Wayne G. Landis, Steven R. Eikenbary, Ethan A. Brown, Colter P. Lemons, Emma E. Sharpe, April J. Markiewicz

IETC Publications

The Relative Contributions of Contaminants to Environmental Risk in the Upper San Francisco Estuary: Progress Report Year 1 and Appendices

Prepared for: The Metropolitan Water District of Southern California

Prepared by: Wayne G. Landis, Steven R. Eikenbary, Ethan A. Brown, Colter P. Lemons, Emma E. Sharpe, and April J. Markiewicz

Institute of Environmental Toxicology, Huxley College of the Environment

Western Washington University

Bellingham, WA 98225

June 30, 2020

Development Of A Hybrid Bayesian Network Model For Predicting Acute Fish Toxicity Using Multiple Lines Of Evidence, S. Jannicke Moe, Anders L. Madsen, Kristin A. Connors, Jane M. Rawlings, Scott E. Belanger, Wayne G. Landis, Raoul Wolf, Adam D. Lillicrap

IETC Publications

A hybrid Bayesian network (BN) was developed for predicting the acute toxicity of chemicals to fish, using data from fish embryo toxicity (FET) testing in combination with other information. This model can support the use of FET data in a Weight-of-Evidence (WOE) approach for replacing the use of juvenile fish. The BN predicted correct toxicity intervals for 69%–80% of the tested substances. The model was most sensitive to components quantified by toxicity data, and least sensitive to components quantified by expert knowledge. The model is publicly available through a web interface. Further development of this model should include additional lines …

Integration Of Chlorpyrifos Acetylcholinesterase Inhibition, Water Temperature, And Dissolved Oxygen Concentration Into A Regional Scale Multiple Stressor Risk Assessment Estimating Risk To Chinook Salmon, Wayne G. Landis, Valerie R. Chu, Scarlett E. Graham, Meagan J. Harris, April J. Markiewicz, Chelsea J. Mitchell, Katherine E. Von Stackelberg, John D. Stark

IETC Publications

We estimated the risk to populations of Chinook salmon (Oncorhynchus tshawytscha) due to chlorpyrifos (CH), water temperature (WT), and dissolved oxygen concentration (DO) in 4 watersheds in Washington State, USA. The watersheds included the Nooksack and Skagit Rivers in the Northern Puget Sound, the Cedar River in the Seattle–Tacoma corridor, and the Yakima River, a tributary of the Columbia River. The Bayesian network relative risk model (BN‐RRM) was used to conduct this ecological risk assessment and was modified to contain an acetylcholinesterase (AChE) inhibition pathway parameterized using data from CH toxicity data sets. The completed BN‐RRM estimated risk at a …