Northwest Fisheries Science Center

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Document Type: Journal Article
Center: NWFSC
Document ID: 8640
Title: Climatic regulation of the neurotoxin domoic acid
Author: S. Morgaine McKibben, William T. Peterson, A. Michelle Wood, Vera L. Trainer, Matthew Hunter, Angelicque E. White
Publication Year: 2017
Journal: Proceedings of the National Academy of Sciences, USA
Volume: 114
Issue: 2
Pages: 239-244
Keywords: Harmful algal blooms, Oregon, domoic acid, climate, El Nino,

Domoic acid is a potent neurotoxin produced by certain marine microalgae that can accumulate in the foodweb, posing a health threat to human seafood consumers and wildlife in coastal regions worldwide.  Evidence of climatic regulation of domoic acid in shellfish over the past 20 y in the Northern California Current regime is shown.  The timing of elevated domoic acid is strongly related to warm phases of the Pacific Decadal Oscillation and the Oceanic Niño Index, an indicator of El Niño events.  Ocean conditions in the northeast Pacific that are associated with warm phases of these indices, including changes in prevailing currents and advection of anomalously warm water masses onto the continental shelf, are hypothesized to contribute to increases in this toxin.  We present an applied domoic acid risk assessment model for the US West Coast based on combined climatic and local variables.  Evidence of regional- to basin-scale controls on domoic acid has not previously been presented.  Our findings have implications in coastal zones worldwide that are affected by this toxin and are particularly relevant given the increased frequency of anomalously warm ocean conditions.


Climate and HABs off the Oregon coast

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Theme: Sustainable, safe and secure seafood for healthy populations and vibrant communities
Foci: Provide scientific support to ensure safe seafood for healthy populations and characterize how human activities and climate affect risks from pathogens, chemical contaminants and biotoxins