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Projects

Integration of Alternative Methods of Analysis wit...

We are seeking Interstate Shellfish Sanitation Conference approval for a quick test to replace the mouse bioassay in some regulatory instances as the method for monitoring brevetoxins in shellfish. These ...
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Interannual Variability of PSP Toxicity in Eastern...

The Gulf of Maine is impacted annually by Alexandrium fundyense blooms which can result in paralytic shellfish poisoning. Paralytic shellfish poisoning (PSP) leads to significant economic impacts. The paralytic shellfish ...
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Karenia brevis Nutrient Dynamics in the Eastern Gu...

In the relatively nutrient-poor offshore waters of the eastern Gulf of Mexico, destructive blooms of Karenia brevis cause environmental and economic destruction. We studied how this marine alga initiates and ...
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Linking Biogeochemistry to Harmful Algal Bloom Nut...

The Long Island Brown Tide (LIBT) threatens shellfish and sea grasses in mid-Atlantic estuaries. LIBT-specific gene expression assays are being developed and tested for enzymes and transporters that allow LIBT ...
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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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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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Seasonal Forecasting of Karenia brevis Red Tide Bl...

This project is developing modeling tools to improve short term and seasonal predictions of toxic red tide Karenia brevis blooms in the Gulf of Mexico West Florida Shelf. The project ...
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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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News

NCCOS Research Explores New Approaches to Decoding...

A brown tide bloom in Great South Bay, Long Island, NY .Credit: Dr. Chris Gobler, Stony Brook University. Brown tides, caused by the algal species Aureococcus anophagefferens, have been plaguing ...
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NCCOS Monitoring Cyanobacterial Blooms in Lake Pon...

The Bonnet Carré Spillway is a flood control operation designed to divert the nutrient-rich waters of the Mississippi River into Lake Pontchartrain when river water levels get too high, in ...
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Tenth Harmful Algal Bloom Symposium Highlights NCC...

Credit. 10th US Symposium on Harmful Algae. The 10th US Symposium on Harmful Algae, held November 3-8, 2019, focused on emerging harmful algal blooms (HABs) in the US, crossing the ...
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Co-occurrence of Different HAB Toxins Detected in ...

NCCOS-sponsored research has documented the presence of three harmful algal bloom (HAB) toxins at seven different locations, about 18 to 33 miles apart, off the coast of southern California. All ...
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Why are Toxic Pseudo-nitzschia Blooms Increasing i...

In the Gulf of Maine (GOM), the presence of the toxic diatom genus Pseudo-nitzschia (PN) is growing. Unprecedented levels of domoic acid in 2016 led to the first Amnesic Shellfish ...
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Protecting Your Dog from Harmful Algal Blooms: Inf...

Infographic: Keeping Your Dog Safe from HABs. Transcript here | Download graphic here HAB 101: Harmful algal blooms — commonly called HABs — are found in every state in the U.S., ...
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Florida Governor Appoints NCCOS Scientist to Red T...

Dr. Quay Dortch. Credit: NOAA. Governor Ron DeSantis has appointed NCCOS's Dr. Quay Dortch to the recently re-organized Florida Red Tide Task Force. The governor made the announcement at an ...
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NCCOS and GCOOS Soliciting Proposals for Assessing...

The National Centers for Coastal Ocean Science (NCCOS) and the Gulf of Mexico Coastal Ocean Observing System Regional Association (GCOOS-RA) are pleased to announce a funding opportunity for projects assessing ...
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NCCOS Assists Response to Cyanobacterial Blooms in...

NOAA's National Centers for Coastal Ocean Science provided a HAB Event Response award of $12,900 to the Louisiana State University (LSU) and the Pontchartrain Conservancy (formally Lake Pontchartrain Basin Foundation).  ...
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Underwater Robotic Sensors Deployed in Gulf of Mai...

Map showing locations of ESPs (yellow dots) and cruise survey stations (blue dots) in the Bay of Fundy and the Gulf of Maine. Credit: Woods Hole Oceanographic Institution. Last week, ...
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Products

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Data & Publications

Detecting copepod grazing on low-concentration populations of Alexandrium fundyense using PCR

Zooplankton grazing is often a significant loss term for phytoplankton populations, including harmful algae, impacting the development and decline of blooms. However, detecting and quantifying predation on phytoplankton is often challenging, particularly during early bloom stages when phytoplankton cell concentrations ...
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Detecting toxic diatom blooms from ocean color and a regional ocean model

An apparent link between upwelling-related physical signatures, macronutrients, and toxic diatom blooms in the various “hotspots” throughout California has motivated attempts to forecast harmful algal blooms (HABs) as a function of select environmental variables. Empirical models for predicting toxic Pseudo-nitzschia ...
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Distance maps to estimate cell volume from two-dimensional plankton images

We describe and evaluate an algorithm that uses a distance map to automatically calculate the biovolume of a planktonic organism from its two-dimensional boundary. Compared with existing approaches, this algorithm dramatically increases the speed and accuracy of biomass estimates from ...
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Diversity and dynamics of a widespread bloom of the toxic dinoflagellate Alexandrium fundyense

Historically, cosmopolitan phytoplankton species were presumed to represent largely unstructured populations. However, the recent development of molecular tools to examine genetic diversity have revealed differences in phytoplankton taxa across geographic scales and provided insight into the physiology and ecology of ...
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Does the fall phytoplankton bloom control recruitment of Georges Bank haddock, Melanogrammus aeglefinus, through parental condition?

In 2003, the Georges Bank stock of haddock (Melanogrammus aeglefinus) experienced the largest recruitment event recorded during its assessed history. Several hypotheses have been advanced to explain recruitment variability in this much-scrutinized stock, including variability in the retention of eggs ...
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Domoic acid and fish behavior: A review

This paper provides a summary of the “state of knowledge” regarding behavioral impacts of domoic acid exposure on fish. Initial studies by authors of this paper suggested that fish are behaviorally impacted by domoic acid in the same way that ...
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Drifter Observations of the Gulf of Maine Coastal Current

Two-hundred and twenty seven satellite-tracked drifters were deployed in the Gulf of Maine (GoM) from 1988 to 2007, primarily during spring and summer. The archive of tracks includes over 100,000 km logged thus far. Statistics such as transit times, mean ...
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Dynamics of a mesoscale eddy off Cape Ann, Massachusetts in May 2005

Observations and numerical modeling indicate that a mesoscale anti-cyclonic eddy formed south of Cape Ann at the northern entrance of Massachusetts Bay (MB) during May 2005, when large river discharges in the western Gulf of Maine and two strong Nor'easters ...
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Ecosystem disruptive algal blooms of the brown tide species, Aureococcus anophagefferens and Aureoumbra lagunensis

Brown tides of the pelagophytes Aureococcus anophagefferens Hargraves et Sieburth and Aureoumbra lagunensis DeYoe et Stockwell have formed ecosystem disruptive algal blooms in shallow estuaries of the United States and South Africa for more than two decades. These algae achieve ...
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Effects of inorganic and organic nitrogen and phosphorus on the growth and toxicity of two Alexandrium species from Hong Kong

The effects of three nitrogen (N) and two phosphorus (P) inorganic and organic forms on the growth, toxin content and composition, toxin production, and chemical composition of Alexandrium catenella and Alexandrium tamarense isolated from coastal waters of Hong Kong were ...
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General Pages

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NOAA Internship Opportunities

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