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Projects

Complex Interactions Between Harmful Phytoplankton...

We identified how nutrients and exotic zebra mussels interact to promote harmful algal blooms (HABs) in the Great Lakes. Results show the relationship between nutrient loading, herbivore grazing, and HABs ...

Cross-Regional Comparison of Dinophysis Bloom Dyna...

Harmful algal blooms of Dinophysis have recently emerged as a human health threat in the U.S., resulting in closures of shellfish harvesting to prevent Diarrhetic Shellfish Poisoning. We are working ...

Defining Domoic Acid Epileptic Disease

Domoic acid epileptic disease, a central nervous system disorder caused by the algal toxin domoic acid (DA), first showed up in humans in a 1987 shellfish poisoning in Quebec, Canada ...

Deposition and Resuspension of Alexandrium fundyen...

Toxins from annual blooms of Alexandrium fundyense accumulate in shellfish; shellfish harvesting closures protect human health, but are economically disruptive. Seed-like cysts produced by A. fundyense accumulate in bottom sediments ...

Developing a Chesapeake Bay HAB Monitoring and For...

This project will pilot a regional monitoring and response network for the lower Chesapeake Bay that incorporates a diverse suite of existing and new field and experimental measurements. It will ...

Developing a Machine Learning-Based, High Resoluti...

Blooms of Alexandrium occur in the Gulf of Maine each year and produce toxins that can accumulate in shellfish, causing Paralytic Shellfish Poisoning. Regional management agencies conduct rigorous monitoring to ...

Developing an Operational Sargassum HAB Monitoring...

This project will improve the effectiveness of existing NOAA and partner Sargassum detection and forecasting capabilities, facilitate a better understanding of biochemical impacts associated with inundation or beaching events, and ...

Developing Biomarkers for Bloom Growth and Death i...

The microscopic alga Karenia brevis causes harmful algal blooms (red tides) in the Gulf of Mexico. By studying the processes regulating the life cycle of K. brevis, we developed biomarkers ...

Developing Practical and Affordable Water Filtrati...

We are testing the use of local, natural bacteria to destroy cyanotoxins. These toxins are produced by freshwater cyanobacteria, also known as blue-green algae, and they contaminate municipal water supplies ...

Development and Implementation of an Operational H...

This project developed a prototype operational statistical nowcast/forecast system for three harmful algal bloom (HAB) organisms in the Chesapeake Bay ecosystem, specifically the dinoflagellates Karlodinium veneficum, Prorocentrum minimus, and the ...

News

NOAA Predicts a Moderate Harmful Algal Bloom for L...

Caption: Blooms with a severity index above 5 generally pose greater risk to drinking water and recreation in Lake Erie, but the impact of a bloom also depends on its ...

2023 Gulf of Maine Red Tide Predicted to be Low

Researchers with NOAA’s National Centers for Coastal Ocean Science (NCCOS) are expecting another low to moderate red tide for the Gulf of Maine this spring and summer, continuing the pattern ...

Harmful Algal Bloom Workshop Focuses on Alaskan Co...

Attendees at the 2023 Alaska HAB Workshop. Climatic changes in Arctic Alaska are resulting in more harmful algal blooms (HABs) for the region, signaling a potential growing threat to human ...

NCCOS Contributes to 2023 Annual meeting of the Na...

Dr. Suzanne Bricker (l) and Ms. Shelly Tomlinson (r) with Dr. Sandy Shumway, President-elect National Shellfish Association and Conference Manager, at the 115th Annual meeting of the National Shellfish Association ...

Publication Provides Guidance on Implementing Earl...

An international team of researchers and managers that includes NCCOS scientists published technical guidance to help improve harmful algal bloom (HAB) monitoring and forecasting around the globe. The document provides ...

Study Estimates Economic Impacts of Harmful Algal ...

Razor clamming on Washington coast, October 20, 2021. Credit: Washington Department of Fish and Wildlife. A new study from NCCOS-funded researchers estimates a range of economic impacts that result from ...

Pacific Northwest Tribes Participate in NCCOS-host...

Tribal members collecting phytoplankton. Credit: NOAA. NCCOS scientists hosted a phytoplankton and toxin monitoring workshop for Tribal environmental specialists from the First Nations Health Authority, part of the WATCH Community ...

2022 Lake Erie Algal Bloom More Severe than Predic...

Bloom severity index (SI) for 2002-2022. The SI is based on the amount of biomass over the peak 30-days. The 2022 bloom had a severity of 6.8. October marked the ...

Annual Harmful Algal Cyst Sampling Cruise Complete...

Seed-like cysts of the harmful alga Alexandrium catenella. Credit: Tyler Harman, Mark Vandersea, NOAA NCCOS. Scientists from NCCOS and Woods Hole Oceanographic Institution embarked on a seven-day sediment sampling mission ...

11th U.S. Harmful Algal Bloom Symposium Highlights...

The 11th U.S. Symposium on Harmful Algae highlighted advances in research and development of scientifically sound solutions to aid communities across the country in responding to the increasing impacts from harmful ...

Products

Maps, Tools & Applications

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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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

Effects of an Acute Hypoxic Event on Microplankton Community Structure in a Coastal Harbor of Southern California

Fish mortality and hypoxic events occur in many coastal and inland systems and may result from natural or anthropogenically mediated processes. The effects of consequent changes in water biogeochemistry have been investigated for communities of benthic invertebrates and pelagic metazoans ...

Effects of growth phase, diel cycle and macronutrient stress on the quantification of Heterosigma akashiwo using qPCR and SHA

The development of molecular probe technologies over the last several decades has enabled more rapid and specific identification and enumeration of phytoplankton species compared to traditional technologies, such as light microscopy. Direct comparisons of these methods with respect to physiological ...

General Pages

HAB Forecasts

Our HAB forecasts alert coastal managers to blooms before they cause serious damage. Short-term (once or twiceweekly) forecasts identify which blooms are potentially harmful, where they are, how big they ...

HAB Prevention

Effective HAB prevention and control must consider the HAB species, their toxicity, the causes of the bloom, how the species interact with their environment, as well as the resulting environmental ...

Harmful Algae from Satellite for Southwest Florida

Harmful Algal Bloom Monitoring SystemAlgal Blooms from Satellite for Southwest FloridaKarenia brevis is either not present or at background levels in water samples, so blooms are unlikely to be Karenia ...

Harmful Algal Bloom Monitoring System

Harmful algal blooms (HABs) occur when algae—simple plants that live in the sea and freshwater—grow out of control and sometimes produce toxins harmful to people and animals. Only a small ...

Harmful Algal Blooms

Harmful algal blooms (HABs) occur when algae—simple photosynthetic organisms that live in the sea and freshwater—grow out of control while producing toxic or harmful effects on people, fish, shellfish, marine ...

Lake Erie

Harmful Algal Bloom ForecastsNOAA provides forecasts for seasonal blooms of cyanobacteria (blue-green algae) in Lake Erie, typically from July to October when warmer water creates favorable bloom conditions. Western Lake ...

MERHAB

Our funding enhances state and regional monitoring with advanced harmful algae detection capabilities, from low-cost shellfish toxin tests to high-tech sensors at sea. The Monitoring and Event Response for Harmful ...

Mixing Forecast

Forecast of the potential for mixing over at least the next 96 hours, to determine whether the majority of the bloom is at the surface,subsurface, or mixed throughout the water ...

NCCOS Monitoring and Assessments

Coastal and inland communities rely on NCCOS for an understanding of threats to their environmental resources. Our products and services help communities ensure the security of their water supplies, the ...

Our External HAB Portfolio

Harmful Algal Blooms (HABs) occur in all coastal states and cause adverse public health, socioeconomic, and environmental impacts. Competitive Research Program funds research on HAB prevention, forecasting, ecosystem and socioeconomic ...

NOAA Internship Opportunities

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