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Projects

Harmful Algal Bloom Event Response: Helping New Yo...

Emergency funds from NCCOS allowed New York to monitor algal toxins during a bloom event that coincided with a state spending freeze. Shellfish consumers and the reputation of one of ...
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Harmful Algal Blooms Event Response: Responding to...

We helped Alaska state regulators, the shellfish industry, and community leaders initiate routine, rapid screening of noncommercial shellfish in southeast Alaska for paralytic shellfish poisoning (PSP) toxins. We also worked ...
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Implementing Karenia brevis Respiratory Risk For...

This project will establish a network that incorporates state monitoring partners and citizen scientists to show that the HABscope-based forecast system can provide robust, timely and useful bloom locations and ...
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Improving the Gulf of Maine HAB Forecast with Envi...

Toxic algal blooms pose a serious health risk and often disrupt valuable regional shellfisheries. Eating seafood tainted with algal toxins can sicken or even kill people. We are pioneering use ...
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Improving Tools for Monitoring Multiple HAB Toxins...

The impacts of cyanobacteria (blue-green algae) toxins are an emerging public health and environmental issue in brackish and marine ecosystems, yet coastal harmful algal bloom (HAB) monitoring programs to date ...
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Life and Death of a Karenia Bloom in the Western G...

Harmful algal blooms (HABs) are increasing in frequency and pose a threat to human and environmental health. Blooms of Karenia brevis occur nearly annually along the Florida coast which has ...
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Life and Death of Karenia brevis Blooms in the Eas...

An extensive bloom of the brevetoxin-producing Karenia brevis occurred from 2017 to 2019 in Florida. The economic, environmental, and human health impacts were quite severe during this event. This regional ...
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Microcystins in Bivalves: Optimizing of Monitoring...

This project addresses an emerging concern across the US - the transfer of freshwater algal toxins into the marine environment where they can infiltrate the food web and present a ...
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Monitoring and Event Response for Harmful Algal Bl...

Monitoring and Event Response for Harmful Algal Blooms in the Lower Great Lakes (MERHAB-LGL) was the first regional, multi-institution project to examine toxic cyanobacteria in the lower Great Lakes and ...
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Monitoring and Management of Lipophilic Shellfish ...

Lipid and fat soluble (lipophilic) toxins linked to diarrhetic shellfish poisoning and azaspiracid shellfish poisoning are emerging threats to recreational, subsistence, and commercial shellfisheries in Washington State. These toxins are ...
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News

Algal Cyst Sampling in Alaska Advances Multi-Regio...

Sediment collection in Chiniak Bay, near Kodiak Alaska. Credit: Julie Matweyou, Alaska Sea Grant NCCOS funded partners recently completed field work in Kodiak Alaska to continue advancing a coordinated, multi-region ...
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Urea-based Fertilizer Promotes Blue-Green Algal Bl...

Figure 1. The MERHAB Autonomous Research Vessel In-situ (MARVIN) deployed in Sarasota Bay in 2009. Credit FWC. A recent NCCOS-supported study observed that urea inputs into Sarasota Bay, FL influenced ...
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National Harmful Algal Bloom Observing Network Fra...

The National Harmful Algal Bloom Observing Network (NHABON) Framework offers a high-level regional analysis of existing efforts to monitor and forecast harmful algal blooms (HABs) and identifies gaps in observing ...
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Marine Heatwaves Fuel Harmful Algal Blooms Off US ...

Recreational razor clamming can bring thousands of visitors to the Washington coast. Toxins concentrated in razor clam and Dungeness crab fisheries have caused economic damage to coastal communities. Repeated marine ...
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Linking Chlorophyll Concentration and Wind Pattern...

The California Current System (CCS) is a highly productive region because of wind driven upwelling which supplies nutrients to the euphotic zone. Few studies have compared upwelling and algae blooms ...
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NOAA Algal Toxin Study Supports U.S. Effort to Res...

UPDATE: September 23, 2020 The FDA announced its first-ever equivalence determination with a notice in the Federal Register. The equivalence determination will enable Spain and the Netherlands to export raw ...
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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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Promising HAB Control Method Builds on NCCOS Funde...

Fluorescent images of a harmful dinoflagellate before (left) and after (middle and right) exposure to the Shewanella-derived algicide. Note the impacts on the nucleus, shown in blue. The research points ...
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Products

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Data & Publications

Harmful Algae and Their Potential Impacts on Desalination Operations off Southern California

Seawater desalination by reverse osmosis (RO) is a reliable method for augmenting drinking water supplies. In recent years, the number and size of these water projects have increased dramatically. As freshwater resources become limited due to global climate change, rising ...
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Identification of Azadinium species and a new azaspiracid from Azadinium poporum in Puget Sound, Washington State, USA

The identification of a new suite of toxins, called azaspiracids (AZA), as the cause of human illnesses after the consumption of shellfish from the Irish west coast in 1995, resulted in interest in understanding the global distribution of these toxins ...
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Initiation and Development of a Toxic and Persistent Pseudo-nitzschia Bloom off the Oregon Coast in Spring/Summer 2015

In spring/summer 2015, a toxic bloom by the diatom Pseudo-nitzschia (PN) occurred along the west coast of the United States which led to closures of the harvest of razor clams and Dungeness crabs. Twice monthly observations of temperature, salinity, nutrients, ...
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Macro- to Fine-Scale Spatial and Temporal Distributions and Dynamics of Phytoplankton and Their Environmental Driving Forces in a Small Montane Lake in Southern California, USA

A wireless network of buoys, two autonomous robotic boats, and an autonomous tethered vertical profiling system were used to characterize phytoplankton dynamics and spatiotemporal changes in chemical and physical forcing factors in a small montane lake (Lake Fulmor, Idyllwild, California) ...
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Mitigating the Expansion of Harmful Algal Blooms Across the Freshwater-to-Marine Continuum

Anthropogenic nutrient overenrichment, coupled with rising temperatures, and an increasing frequency of extreme hydrologic events (storms and droughts) are accelerating eutrophication and promoting the expansion of harmful algal blooms (HABs) across the freshwater-to-marine continuum. All HABs—with a focus here on ...
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Monitoring Approaches for Early Warning of Domoic Acid Events in Washington State

On the U.S. west coast, blooms of the potentially toxic diatom Pseudo-nitzschia can cause amnesic shellfish poisoning (ASP), resulting in economic impacts to coastal economies and public health concerns. The transfer of toxin, via filter feeding of Pseudo-nitzschia or ingestion ...
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Monitoring Oregon Coastal Harmful Algae: Observations and Implications of a Harmful Algal Bloom-Monitoring Project

The accumulation of domoic acid (DA) and saxitoxins (STX), phycotoxins produced by some species of Pseudo-nitzschia and Alexandrium, respectively, in coastal food webs are a focus of research on the West Coast of the United States due to the deleterious ...
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Multiple Stressors at the Land-Sea Interface: Cyanotoxins at the Land-Sea Interface in the Southern California Bight

Blooms of toxic cyanobacteria in freshwater ecosystems have received considerable attention in recent years, but their occurrence and potential importance at the land-sea interface has not been widely recognized. Here we present the results of a survey of discrete samples ...
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Nitrogenous Nutrients Promote the Growth and Toxicity of Dinophysis acuminata during Estuarine Bloom Events

Diarrhetic Shellfish Poisoning (DSP) is a globally significant human health syndrome most commonly caused by dinoflagellates within the genus Dinophysis. While blooms of harmful algae have frequently been linked to excessive nutrient loading, Dinophysis is a mixotrophic alga whose growth ...
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Ocean warming since 1982 has expanded the niche of toxic algal blooms in the North Atlantic and North Pacific oceans

Global ocean temperatures are rising, yet the impacts of such changes on harmful algal blooms (HABs) are not fully understood. Here we used high-resolution sea-surface temperature records (1982 to 2016) and temperature-dependent growth rates of two algae that produce potent ...
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