Blooms of some species of the diatom Pseudo-nitzschia produce a neurotoxin that accumulates in shellfish, which can cause illness and even death in humans who eat them. Shellfish managers monitor ... Read More
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 ... Read More
We are improving detection of species of the toxin-producing alga Alexandrium in the field by producing highly portable, efficient, and effective biosensors. Alexandrium can be hard to identify and sample, ... Read More
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 ... Read More
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 ... Read More
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 ... Read More
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 ... Read More
Through this pilot project in the coastal waters of Southern California, we demonstrated the effectiveness of adding emerging technologies to harmful algal bloom monitoring programs that focus on toxic blooms ... Read More
Example of the California land-sea interface: Upland reservoir ➝ river ➝ estuary ➝ Pacific Ocean. Credit M. Howard, SCCWRP Research sponsored by NCCOS finds harmful cyanobacteria (aka blue-green algae) and ... Read More
Blooms of the marine diatom genus Pseudo-nitzschia that produce the neurotoxin domoic acid have been documented with regularity along the coast of southern California since 2003, with the occurrence of the toxin in shellfish tissue predating information on domoic acid ... Read More
A coastwide bloom of the toxigenic diatom Pseudo-nitzschia in spring 2015 resulted in the largest recorded outbreak of the neurotoxin, domoic acid, along the North American west coast. Elevated toxins were measured in numerous stranded marine mammals and resulted in ... Read More
Abundances of Pseudo-nitzschia spp. and concentrations of particulate domoic acid (DA) were determined in the Southern California Bight (SCB) along the coasts of Los Angeles and Orange Counties during spring and summer of 2003 and 2004. At least 1500 km2 ... Read More
San Francisco Bay (SFB) is a eutrophic estuary that harbors both freshwater and marine toxigenic organisms that are responsible for harmful algal blooms. While there are few commercial fishery harvests within SFB, recreational and subsistence harvesting for shellfish is common ... Read More
Domoic acid is a potent neurotoxin produced by certain marine microalgae that can accumulate in the foodweb, posing a health threat to human seafood consumers and wildlife in coastal regions worldwide. Evidence of climatic regulation of domoic acid in shellfish ... Read More
In this study, we directly compared two molecular techniques, sandwich hybridization assay (SHA) and quantitative PCR (qPCR), for quantifying laboratory cultures of the ichthyotoxic raphidophyte Heterosigma akashiwo. To maximize comparisons, all experiments entailed raising H. akashiwo in the laboratory, generating ... Read More
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 ... Read More
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 ... Read More
Marine biotoxin-contaminated seafood has caused thousands of poisonings worldwide this century. Given these threats, there is an increasing need for improved technologies that can be easily integrated into coastal monitoring programs. This study evaluates approaches for monitoring toxins associated with ... Read More
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 ... Read More
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NCCOS delivers ecosystem science solutions for stewardship of the nation’s ocean and coastal resources, in direct support of NOS priorities, offices, and customers, and to sustain thriving coastal communities and economies.