A5078053675- Marine and coastal ecosystems
- Marine Toxins and Detection Methods
- Microbial Community Ecology and Physiology
- Marine Biology and Ecology Research
- Protist diversity and phylogeny
- Toxic Organic Pollutants Impact
- Isotope Analysis in Ecology
- Diatoms and Algae Research
- Marine and coastal plant biology
- Geological and Geophysical Studies
- Hemoglobin structure and function
- Environmental Toxicology and Ecotoxicology
- Marine Biology and Environmental Chemistry
- Nicotinic Acetylcholine Receptors Study
- Genomics and Phylogenetic Studies
- Per- and polyfluoroalkyl substances research
- Effects and risks of endocrine disrupting chemicals
- Radioactive contamination and transfer
- Polyamine Metabolism and Applications
- Geochemistry and Geologic Mapping
- Geology and Paleoclimatology Research
- Water Quality and Resources Studies
- Marine and environmental studies
- Pesticide and Herbicide Environmental Studies
- Neuroscience of respiration and sleep
NOAA National Marine Fisheries Service Northwest Fisheries Science Center
2000-2024
National Oceanic and Atmospheric Administration
1997-2021
NOAA National Marine Fisheries Service
2000-2021
Abstract A coastwide bloom of the toxigenic diatom Pseudo‐nitzschia in spring 2015 resulted largest recorded outbreak neurotoxin, domoic acid, along North American west coast. Elevated toxins were measured numerous stranded marine mammals and geographically extensive prolonged closures razor clam, rock crab, Dungeness crab fisheries. We demonstrate that this was initiated by anomalously warm ocean conditions. australis thrived north its typical range warm, nutrient‐poor water spanned...
Sea lion mortalities in central California during May and June 1998 were traced to their ingestion of sardines anchovies that had accumulated the neurotoxin domoic acid. The detection toxin urine, feces, stomach contents several sea lions represents first proven occurrence acid transfer through food chain a marine mammal. pennate diatoms, Pseudo‐nitzschia multiseries P. australis , dominant, toxin‐producing phytoplankton constituting algal blooms near Monterey Bay, Half Moon Oceano Dunes,...
The illness of three people in 2011 after their ingestion mussels collected from Sequim Bay State Park, Washington State, USA, demonstrated the need to monitor diarrhetic shellfish toxins (DSTs) for protection human health. Following these cases poisoning, monitoring DSTs became formalized 2012, guided by routine Dinophysis species SoundToxins program Puget Sound and Olympic Region Harmful Algal Bloom (ORHAB) partnership on outer coast. Here we show that at concentrations above guidance...
A heatwave that blanketed the northeast Pacific Ocean in 2013–2015 had severe impacts on marine ecosystem through altered species composition and survival. direct result of this was a sustained, record-setting harmful algal bloom (HAB), caused by toxigenic diatom, Pseudo-nitzschia , led to an unprecedented delay harvest opportunity for commercial Dungeness crab ( Metacarcinus magister ) closure other recreational, tribal shellfish harvest, including razor clams. Samples collected during...
The identification of a new suite toxins, called azaspiracids (AZA), as the cause human illnesses after consumption shellfish from Irish west coast in 1995, resulted interest understanding global distribution these toxins and species small dinoflagellate genus Azadinium, known to produce them. Clonal isolates four A. poporum, cuneatum, obesum dalianense were obtained incubated sediment samples collected Puget Sound, Washington State 2016. These Azadinium identified using morphological...
Plankton samples from three inland embayments and several outer coastal sites of Washington State were collected 1997 through 1999 examined for the presence diatoms genus Pseudo‐nitzschia levels toxin, domoic acid (DA). Seven species observed, including pungens (Grunow ex Cleve) Hasle, P. multiseries (Hasle) australis Frenguelli, fraudulenta (Cleve) cf. heimii Manguim, pseudodelicatissima delicatissima Heiden. The assemblages differed significantly those observed within embayments. dominant...
The illness of three people due to diarrhetic shellfish poisoning (DSP) following their ingestion recreationally harvested mussels from Sequim Bay State Park in the summer 2011, resulted intensified monitoring for toxins (DSTs) Washington State. Rapid testing at remote sites was proposed as a means provide early warning DST events order protect human health and allow growers test “pre-harvest” samples, thereby preventing harvest toxic product that would later be destroyed or recalled. Tissue...
A bloom of the pennate diatom Pseudo-nitzschia, several species which are associated with production potent excitotoxin domoic acid, was observed in a Puget Sound, Washington embayment July and August 1997. Penn Cove, receives nutrients from nearby Skagit River abundant sunshine during summer months due to its location rain shadow Olympic Mountains, is home commercial mussel farm supplies shellfish many coastal areas USA. Levels acid mussels increased 3 ppm on 6 10 July, corresponding...
Several species of the diatom Pseudo-nitzschia produce neurotoxin domoic acid (DA). Consumption fish and shellfish that have accumulated this potent excitotoxin has resulted in severe illness even death humans, marine mammals, seabirds. pungens (Grunow ex Cleve) Hasle is a cosmopolitan commonly occurring waters Pacific Northwest (PNW) eastern North Atlantic, including Sea. However, genetic physiological relationships among populations throughout large geographic distribution not been...
Efforts to identify in situ the mechanisms underpinning response of harmful algae climate change demand frequent observations dynamic and often difficult access marine freshwater environments. Increasingly, resource managers researchers are looking fill this data gap using unmanned systems. In study we integrated Environmental Sample Processor (ESP) into an autonomous platform provide near real-time surveillance toxin domoic acid on Washington State continental shelf over a three-year period...
A survey of marine pelagic coastal microbial communities was conducted over a large geographic latitude range, from Cape Mendocino in northern California USA to Queen Charlotte Sound British Columbia Canada, during the spring summer transition. DNA metabarcoding and flow cytometry were used characterize communities. Physical chemical oceanography indicated moderate conditions with no widespread upwelling, heat wave, or other extreme conditions. However, four locations displayed features...