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News

NCCOS Provides HAB Technology Guidance to African ...

Training participants receive IAEA certificates for HAB sampling and toxin analysisat the Kenya Marine Fisheries and Research Institute in Mombasa, Kenya. Credit: NOAA NCCOS researcher instructs IAEA course participants on ...
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Harmful Algal Cyst Sampling Lays Groundwork for 20...

A view of Alexandrium fundyense cysts under a microscope. Credit: Woods Hole Oceanographic Institution Scientists from NOAAand Woods Hole Oceanographic Institution (WHOI) recently completed their annualharmful algal cyst sampling in ...
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Predicting the Risks of Harmful Algal Blooms for C...

In California, domoic acid-producing harmful algal blooms (HABs) of the diatom Pseudo-nitzschiaincreasingly threaten bivalve and crab harvesters, aquaculture, and coastal ecosystems. Using a blend of models and satellite ocean color ...
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Tiny yet Toxic: Dinoflagellate Karlodinium venefic...

Relatively unknown and taxonomically confusing until the last few decades, the tiny but toxic dinoflagellate, Karlodinium veneficum, can produce dense blooms and fish-killing toxins. K. veneficum is a small chlorophyll-containing ...
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NCCOS Helps New England Respond to Unprecedented H...

For the first time in New England's coastal waters, shellfish have exceeded the regulatory limit for domoic acid - a potent neurotoxin produced by the diatom Pseudo-nitzschia. Domoic acid accumulates ...
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Establishing Sustainable and Cooperative Dead Zone...

Scientists, managers, and agency personnelfrom 26 stakeholder agencies and institutions met to establish a sustainable multi-partner hypoxia monitoring program in the northern Gulf of Mexico at the NCCOS sponsored 6th ...
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NOAA Funds Harmful Algal Bloom Forecast System Dev...

Razor clams are an economically important shellfish harvest off the coasts of Oregon and Washington. Closures due to Pseudo-nitzschia exposure in 2015 led to $22.7 million in losses. Credit: Washington ...
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NCCOS Personnel Receive Emergency Response Trainin...

NCCOS scientistsparticipated in the first NOAA '300 level' course titled: 'Intermediate Incident Command System Training' last monthin Silver Spring, MDin preparation for agency-wideresponse to natural or man-made emergency incidents or ...
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NOAA Provides Harmful Algae Identification Trainin...

Effective monitoring and management of harmful algal blooms (HABs) relies on accurate and timely identification of the species involved. Phytoplankton responsible for HABs varies dramatically in size, shape, pigmentation, toxins, ...
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NOAA Hollings Scholars Provide New Toxicity Data o...

NOAA Hollings scholars Brittany Evans (Eckerd College) and Catherine Nguyen (University of Maryland) spent this summer at the NCCOS laboratory in Charleston, South Carolina, researching the effects of oil spill ...
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Data & Publications

Upregulation of hypoxia-inducible factor (HIF)-1α and HIF-2α mRNA levels in dragonet Callionymus valenciennei exposed to environmental hypoxia in Tokyo Bay

There is an urgent need to develop reliable biomarkers of environmental hypoxia exposure in marine organisms in order to assess the ecological impacts of the marked increase in coastal hypoxia worldwide. Full-length hypoxia-inducible factor HIF-1α and HIF-2α cDNAs were cloned ...
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Urease Gene Sequences from Algae and Hetertrophic Bacteria in Axenic and Nonaxenic Phytoplankton Cultures

While urea has long been recognized as an important form of nitrogen in planktonic ecosystems, very little is known about how many or which phytoplankton and bacteria can use urea as a nitrogen source. We developed a method, targeting the ...
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Using wildlife activity and antibiotic resistance analysis to model bacterial water quality in coastal ponds

Models that help predict fecal coliform bacteria (FCB) levels in environmental waters can be important tools for resource managers. In this study, we used animal activity along with antibiotic resistance analysis (ARA), land cover, and other variables to build models ...
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Variability of biogeochemical processes and physical transport in a partially stratified estuary: a box-modeling analysis

Regional, seasonal, and interannual variations of freshwater inputs, biogeochemical transformations, and pelagic-benthic interactions were examined in the Patuxent River estuary. Monthly rates of net biogeochemical production (or consumption) and physical transport of carbon, oxygen, and nutrients were calculated for 6 ...
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Variations in chemical speciation and reactivity of phosphorus between suspended-particles and surface-sediment in seasonal hypoxia-influenced Green Bay

Water, suspended-particles, and surface-sediment samples were collected from Green Bay, Lake Michigan, for the measurements of phosphorus (P) species, including dissolved/particulate-P, inorganic/organic-P, and five different forms of particulate-P, namely exchangeable- or labile-P (Ex-P), iron-bound-P (Fe-P), biogenic-apatite and/or CaCO3-associated-P (CFA-P), organic-P ...
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Watersheds and coral reefs: conservation science, policy and implementation

Coral reefs worldwide are being degraded by human-induced disturbances, resulting in ecological, economic, and cultural losses. Runoff and sedimentation are among the greatest threats to the coastal reefs surrounding high islands and adjacent to continental landmasses. Existing scientific data identify ...
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Weed Risk Assessment for Aquatic Plants: Modification of a New Zealand System for the United States

We tested the accuracy of an invasive aquatic plant risk assessment system in the United States that we modified from a system originally developed by New Zealand’s Biosecurity Program. The US system is comprised of 38 questions that address biological, ...
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What Goes Up Must Come Down: Integrating Air and Water Quality Monitoring.

Excess nitrogen and phosphorus (“nutrients”) loadings continue to affect ecosystem function and human health across the U.S. Our ability to connect atmospheric inputs of nutrients to aquatic end points remains limited due to uncoupled air and water quality monitoring. Where ...
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Wind-driven lateral circulation in a stratified estuary and its effects on the along-channel flow

In the stratified rotating estuary of Chesapeake Bay, the Ekman transport drives a counterclockwise lateral circulation under down?estuary winds and a clockwise lateral circulation under up?estuary winds (looking into estuary). The clockwise circulation is about twice as strong as the ...
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Zooplankton community grazing impact on a bloom of Alexandrium fundyense in the Gulf of Maine

Shipboard grazing experiments were conducted in the Gulf of Maine and on Georges Bank during of June 2006 to estimate zooplankton community grazing impact on a natural bloom of the toxic dinoflagellate Alexandrium fundyense. Surface seawater samples containing natural populations ...
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