The distribution and impacts of harmful algal bloom species in eastern boundary upwelling systems

Trainer, Vera L.; Pitcher, GC; Reguera, B.; Smayda, Theodore J.

doi:10.1016/j.pocean.2010.02.003

Cited by 139 publications

(111 citation statements)

References 90 publications

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“…In addition, the pDA per Pseudo-nitzschia cell was significantly higher in samples from the rip than offshore; perhaps stressful conditions in the surf zone caused enhanced production of domoic acid. Trainer et al (2010) found concentrations of Pseudo-nitzschia during a bloom off Washington to vary from 10 5 to 10 4 cells/L. A down-welling event ultimately transported this bloom to the inner shelf.…”

Section: Discussionmentioning

confidence: 94%

Variation in the abundance of Pseudo-nitzschia and domoic acid with surf zone type

et al. 2016

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Section: Discussionmentioning

confidence: 94%

Variation in the abundance of Pseudo-nitzschia and domoic acid with surf zone type

et al. 2016

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“…If the latter is indeed a factor, it suggests the potential for "seeding" populations moving northward during warm ocean regimes. Several retentive areas (e.g., Heceta Bank and the Juan de Fuca Eddy) are conducive to phytoplankton bloom initiation, including toxigenic Pseudo-nitzschia (39)(40)(41). Northward advection during warm regimes may be a source of toxic blooms to these regions.…”

Section: Discussionmentioning

confidence: 99%

Climatic regulation of the neurotoxin domoic acid

McKibben

Peterson

Wood

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

131

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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.T he Pacific Decadal Oscillation (PDO) and El Niño Southern Oscillation (ENSO) are recurring patterns of climate variability centered over the northeastern (NE) and equatorial Pacific, respectively, that fluctuate at scales of years (ENSO) to decades (PDO) (1, 2). Distinct, yet also related, these patterns can amplify or dampen each other through atmospheric teleconnection (1, 3). In the NE Pacific, they induce similar spatial patterns of sea surface temperature anomalies during positive (warm) and negative (cool) phases (4). Low-frequency physical variability attributed to the PDO and ENSO modulates large shifts in NE Pacific water temperature, ocean currents, and foodweb dynamics that can persist for months to years (2,5,6). Shifts in NE Pacific plankton communities occur as well (7-12); however, climate impacts on phytoplankton ecology in this region are relatively underexplored, largely due to a lack of phytoplankton data at sufficient scales.Decadal, regional-scale monitoring of domoic acid (DA) in shellfish can be used to investigate climate-scale impacts on phytoplankton ecology. The neurotoxin DA is produced by some species of the diatom genus Pseudo-nitzschia. It enters secondary trophic levels when suspension feeders such as shellfish and anchovies ingest toxic Pseudo-nitzschia cells. Consumption of these organisms by humans can lead to a serious neurological disorder named Domoic Acid Poisoning (DAP), also termed Amnesic Shellfish Poisoning. DAP symptoms range from gastrointestinal disturbance to seizures, memory loss, or, rarely, death (13,14).DA was first identified as a public health threat in 1987 (15). Toxin-producing Pseudo-nitzschia spp. and DA have since been identified worldwide with the greatest prevalence in, and most deleterious impacts on, productive eastern boundary upwelling systems (16). Laboratory experiments have found multiple ...

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“…1; Trainer et al, 2008Trainer et al, , 2010. Although Pseudonitzschia and low levels of DA are found in other regions, e.g.…”

Section: Worldwide Range and Impactsmentioning

confidence: 99%

Pseudo-nitzschia physiological ecology, phylogeny, toxicity, monitoring and impacts on ecosystem health

et al. 2012

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The distribution and impacts of harmful algal bloom species in eastern boundary upwelling systems

Cited by 139 publications

References 90 publications

Variation in the abundance of Pseudo-nitzschia and domoic acid with surf zone type

Variation in the abundance of Pseudo-nitzschia and domoic acid with surf zone type

Climatic regulation of the neurotoxin domoic acid

Pseudo-nitzschia physiological ecology, phylogeny, toxicity, monitoring and impacts on ecosystem health

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