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Projects

Implementation of an Operational Model for Predict...

Earlier NOAA-funded research developed models to predict blooms of toxic Alexandrium fundyense. Toxins accumulate in shellfish, causing illness in human consumers, so states must monitor shellfish and ban harvesting when ...

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 ...

Implementing the Karenia “Tricorder” to Improve Re...

The toxic dinoflagellate Karenia brevis blooms annually in the Gulf of Mexico and negatively impacts human and ecosystem health through production of brevetoxins. A rapid, sensitive, specific assay for the ...

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 ...

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 ...

Integrating Cell and Toxin Cycles of the Dinoflage...

Blooms of Karlodinium veneficum can produce fish-killing toxins called karlotoxins. Toxicity varies over time, with karlotoxins increasing prior to blooms and under growth-limiting conditions. We are testing the theory that ...

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 ...

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 ...

Investigating Domoic Acid Biosynthesis and Toxic B...

The marine diatom Pseudo-nitzschia (PN) produces domoic acid (DA), a neurotoxin that has caused widespread human poisoning along the northeast and northwest coasts of the contiguous U.S. Researchers have investigated ...

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 ...

News

Algal Cyst Sampling in Puget Sound Advances Effort...

Sediment collection in Puget Sound on R\V Robertson. Credit: C. Greengrove, UWT. NCCOS-funded partners recently completed the second of a two-phased research cruise in Puget Sound as part of a ...

Historical Data Used to Analyze Red Tide Bloom Dyn...

Map of the study area. Nearly all annual blooms of the red tide-forming, toxic dinoflagellate Karenia brevis (K. brevis) pose a serious threat to coastal Southwest Florida. New research developed ...

New Study Unveils the Unique Seasonality in the De...

Interannual variations of winter and summer temperature in the Jordan Basin (location as shown in upper panel) at 150-m water depth. The vertical bars represent one standard deviation over the ...

Seasonal Differences in Gambierdiscus Abundance, T...

An NCCOS-sponsored study provides the most comprehensive and quantitative assessment to date of the in situ toxicity of Gambierdiscus marine dinoflagellates in the Caribbean. Study findings have implications for the ...

NCCOS Partners with CERF ‘Rising Tides’- Contribut...

NCCOS sponsored and participated in the 2021 Coastal and Estuarine Research Federation (CERF) 26th Biennial Conference, which was held virtually on November 1-4 and November 8-11, 2021. NCCOS scientists and ...

Climate Change Likely to Worsen Impact of Urban Ru...

The downtown Los Angeles skyline. Credit Wikimedia Commons. An NCCOS-funded study found that nutrient-laden, urban runoff is fueling algal blooms in Southern California's coastal waters that are acidifying the water ...

Understanding Blooms of Dinoflagellate Margalefidi...

Margalefidinium polykrikoides (previously known as Cochlodinium polykrikoides) is a toxic dinoflagellate algae found in Chesapeake Bay. NCCOS sponsored scientists at Old Dominion University used a time-dependent model to assess environmental ...

2021 Lake Erie Algal Bloom More Severe than Predic...

Peak Microcystis cyanobacteria bloom biomass in western Lake Erie (Aug 30-Sep 08, 2021). The images used data derived from the Copernicus Sentinel-3 mission provided by EUMETSAT. Blue indicates low concentrations ...

NOAA Awards $15.2M for Harmful Algal Bloom Researc...

An LRAUV makes its way through the green, algae-rich waters of Lake Erie to track the 2019 harmful algal bloom.Credit: Ben Yair Raanan, Monterey Bay Aquarium Research Institute (MBARI) NOAA ...

NOAA Scientists and Sponsored Researchers Particip...

The 19th International Conference on Harmful Algae (ICHA) was held remotely October 10th - 15th, 2021 from La Paz, Baja California Sur, Mexico. Almost 400 ICHA contributions from 47 countries ...

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Data & Publications

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 ...

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 ...

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 ...

Outbreeding lethality between toxic Group I and nontoxic Group III Alexandrium tamarense spp. isolates: predominance of heterotypic encystment and implications for mating interactions and biogeography

We report the zygotic encystment of geographically dispersed isolates in the dinoflagellate species complex Alexandrium tamarense, in particular, successful mating of toxic Group I and nontoxic Group III isolates. However, hypnozygotes produced in Group I/III co-cultures complete no more than ...

Parameter estimation using an ensemble smoother: the effect of the circulation in biological estimation

An ensemble smoother is used to estimate the initial conditions and mortality rates for a spatially explicit model of Alexandrium fundyense. The data assimilation procedure is effective at reducing model-data misfit in this strong constraint problem formulation. The skill of ...

Parasitism as a biological control agent of dinoflagellate blooms in the California Current System

Amoebophrya is a marine parasite recently found to infect and kill bloom-forming dinoflagellates in the California Current System (CCS). However, it is unknown whether parasitism by Amoebophrya can control dinoflagellate blooms in major eastern boundary upwelling systems, such as the ...

Pathways between primary production and fisheries yields of large marine ecosystems

The shift in marine resource management from a compartmentalized approach of dealing with resources on a species basis to an approach based on management of spatially defined ecosystems requires an accurate accounting of energy flow. The flow of energy from ...

Patterns of River Influence and Connectivity Among Subbasins of Puget Sound, with Application to Bacterial and Nutrient Loading

Puget Sound is an estuarine inland sea fed by 14 major rivers and also strongly influenced by the nearby Fraser River. A comprehensive, particle-based reanalysis of an existing circulation model was used to map the area of influence of each ...

Phosphorus cycling in the red tide incubator region of Monterey Bay in response to upwelling

This study explores the cycling of phosphorus (P) in the euphotic zone following upwelling in northeastern Monterey Bay (the Red Tide Incubator region) of coastal California, with particular emphasis on how bacteria and phytoplankton that form harmful algal blooms mediate ...

Phylogenetic analysis of Brachydinium capitatum (Dinophyceae) from the Gulf of Mexico indicates membership in the Kareniaceae

Brachidinium capitatum F. J. R. Taylor, typically considered a rare oceanic dinoflagellate, and one which has not been cultured, was observed at elevated abundances (up to 65 cells · mL?1) at a coastal station in the western Gulf of Mexico ...

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