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Projects

Linking Models and Field Experiments to Forecast A...

We are investigating the links between environmental variables and harmful algal bloom (HAB) toxins in Lake Erie to better understand the process of toxin development and to forecast HAB toxicity ...
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Mechanism of Harmful Algal Bloom Initiation in the...

Blooms of the toxic dinoflagellate, Karenia brevis, threaten human and ecosystem health and local economies around the Gulf of Mexico. Although the blooms mostly prevail on the west coast of ...
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Metabolism and Physiology of Red Tide Toxins in Tu...

Endangered sea turtles experience severe mortality during Florida red tides. This project uses non-endangered freshwater turtles as a model animal to determine the effects of Florida red tide on endangered ...
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Modeling Favorable Habitat for Alexandrium catenel...

In Puget Sound, the toxic alga Alexandrium catenella threatens people who eat shellfish contaminated with the algal toxin. Previous studies identify “seedbeds” of Alexandrium resting stages (cysts) on the bottom ...
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Multidisciplinary Approach to a Cross-Regional Pro...

Diarrhetic shellfish poisoning (DSP) has emerged as a significant and expanding seafood safety threat in coastal regions across the United States. The harmful algal species Dinophysis produces toxins known to ...
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New Tools to Aid in Managing Ciguatera Poisoning R...

Ciguatera fish poisoning is the most frequently reported non-bacterial illness associated with eating fish in the United States and the U. S. territorial islands. Ciguatera significantly impacts commercial and recreational ...
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Oceanographic and Cellular Controls on Domoic Acid...

Domoic acid (DA) is a neurotoxin produced by some diatoms in the genus Pseudo-nitzschia. DA can accumulate in shellfish and fish, and cause illness or death in humans, marine mammals, ...
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Resolving the Effects of Resource Availability, Pr...

Aureococcus anophagefferens causes brown tides that have severely impacted fisheries, seagrass beds, and aquaculture in mid-Atlantic US coastal waters for three decades. The recent sequencing of the Aureococcus genome, combined ...
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The Columbia River Plume and Harmful Algal Blooms ...

We identified the oceanographic causes and transport routes for the harmful alga Pseudo-nitzschia in the offshore waters of the Pacific Northwest and improved predictability of the arrival of harmful algal ...
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The Role of Nitric Oxide in Promoting Heterosigma ...

Heterosigma akashiwo has emerged as a threat to finfish and shellfish stocks resulting in significant impacts to the coastal economy. We are working to identify the mechanisms and nitrogen sources ...
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News

Renewed Interest to Study Ciguatera Risks in Papah...

Dr. Alison Robertson, an NCCOS ECOHAB sponsored ciguatera expert with the University of South Alabama and Dauphin Island Sea Lab (USA\DISL), is helping the NOAA Office of National Marine Sanctuaries ...
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New Guidance for Managing HAB Impacts on Californi...

A newly released report from the California Ocean Science Trust highlights efforts to learn from the 2015 massive bloom of the toxin-producing marine diatom Pseudo-nitzschia that formed off the U.S ...
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Predicting the Risks of Harmful Algal Blooms for C...

In California, domoic acid-producing harmful algal blooms (HABs) of the diatom Pseudo-nitzschiaincreasingly threaten bivalve and crab harvesters, aquaculture, and coastal ecosystems. Using a blend of models and satellite ocean color ...
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Tiny yet Toxic: Dinoflagellate Karlodinium venefic...

Relatively unknown and taxonomically confusing until the last few decades, the tiny but toxic dinoflagellate, Karlodinium veneficum, can produce dense blooms and fish-killing toxins. K. veneficum is a small chlorophyll-containing ...
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Outlook for Impact of HABs on 2016 Crab Season in ...

On August 11, 2016 Dr. Raphael Kudela, with theUniversity of California Santa Cruz, testified on 'Harmful Algal Blooms and Domoic Acid: Latest Forecast and a Look Ahead to the Upcoming ...
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Harmful Algal Bloom Action Plan Developed for Long...

A public symposium and expert workshop was held on Long Island, NY, May 17-18, 2016with the goal of developinga harmful algal bloom (HAB) action plan for Suffolk County. Three NCCOS-funded ...
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Environmental Variables Influence Toxic Ciguatera ...

Anew study describes optimal growth conditions for several species and strains of the benthic marine dinoflagellate Gambierdiscus and highlights how these species and strains respond differently to varying levels of ...
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Risk of Shellfish Toxicity Predicted by Temperatur...

A new study shows that water temperature and salinity can indicatethe likelyoccurrenceof toxicAlexandrium blooms (a type of harmful algae) in the U. S. Pacific Northwest. As shellfish become contaminated with ...
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NOAA Improves Monitoring of Ciguatera in Fish

NCCOS and their partners have developed a new method for detecting ciguatoxins in fish that does not rely on the typical use of radioisotopes, which are highly regulated and often ...
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Robotic Environmental Sample Processor Conserves S...

Sponsored researchers with the NCCOS ECOHAB project looking at regional harmful algal bloom 'hotspots' off coastal California are testing the feasibility of using a robotic water quality and toxin detection ...
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Maps, Tools & Applications

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Data & Publications

Planktonic microbes in the Gulf of Maine area

In the Gulf of Maine area (GoMA), as elsewhere in the ocean, the organisms of greatest numerical abundance are microbes. Viruses in GoMA are largely cyanophages and bacteriophages, including podoviruses which lack tails. There is also evidence of Mimivirus and ...
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Prominent Human Health Impacts from Several Marine Microbes: History, Ecology, and Public Health Implications

This paper overviews several examples of important public health impacts by marine microbes and directs readers to the extensive literature germane to these maladies. These examples include three types of dinoflagellates (Gambierdiscus spp., Karenia brevis, and Alexandrium fundyense), BMAA-producing cyanobacteria, ...
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Skill assessment for coupled biological/physical models of marine systems

Simulation models coupling physics to biological processes in the ocean are central to many current programs. Ocean physical models have approached a high level of sophistication; the physical relationships are canonical, and modern computational technology for fluid mechanics has advanced ...
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Skill Assessment for Coupled Biological/Physical Models of Marine Systems

Coupled biological/physical models of marine systems serve many purposes including the synthesis of information, hypothesis generation, and as a tool for numerical experimentation. However, marine system models are increasingly used for prediction to support high-stakes decision-making. In such applications it ...
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Suppression of the 2010 Alexandrium fundyense bloom by changes in physical, biological, and chemical properties of the Gulf of Maine

For the period 2005–2009, the abundance of resting cysts in bottom sediments from the preceding autumn was a first-order predictor of the overall severity of spring–summer blooms of Alexandrium fundyense in the western Gulf of Maine and southern New England ...
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The globally distributed genus Alexandrium: Multifaceted roles in marine ecosystems and impacts on human health

The dinoflagellate genus Alexandrium is one of the major harmful algal bloom (HAB) genera with respect to the diversity, magnitude and consequences of blooms. The ability of Alexandrium to colonize multiple habitats and to persist over large regions through time ...
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The influence of anthropogenic nitrogen loading and meteorological conditions on the dynamics and toxicity of Alexandrium fundyense blooms in a New York (USA) estuary

The goal of this two-year study was to explore the role of nutrients and climatic conditions in promoting reoccurring Alexandrium fundyense blooms in the Northport-Huntington Bay complex, NY, USA. A bloom in 2007 was short and small (3 weeks, 103 ...
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Zooplankton community grazing impact on a bloom of Alexandrium fundyense in the Gulf of Maine

Shipboard grazing experiments were conducted in the Gulf of Maine and on Georges Bank during of June 2006 to estimate zooplankton community grazing impact on a natural bloom of the toxic dinoflagellate Alexandrium fundyense. Surface seawater samples containing natural populations ...
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