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Spring Flood Outlook Has Implications for Gulf of Mexico and Chesapeake Bay Hypoxia

The NOAA 2014 U.S. Spring Flood Risk Assessment provides an important first look at some of the factors that influence summer hypoxia (low dissolved oxygen) in the Gulf of Mexico and the Chesapeake Bay. This year’s predicted elevated flood risk in the Upper Midwest and the Ohio River Valley may result in a larger hypoxic […]

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Chesapeake Bay Dead Zones Show Marine Worm Species Shifts

A recent NCCOS-sponsored study conducted by the University of Maryland’s Center for Environmental Science has found a hypoxia-induced shift in marine worm communities in Chesapeake Bay to ones made up of species that are extremely adaptable to stressful conditions like hypoxia (low dissolved oxygen). The team also found that the magnitude of the marine worm […]

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Environmental Conditions Can Influence Development of Dermo Disease in Oysters

A recent NCCOS-sponsored study by the Smithsonian Institution showed that long-term exposure to daily fluctuations of hypoxia (low dissolved oxygen) increased Dermo disease (Perkinsus marinus) infection in previously uninfected eastern oysters. Surprisingly, daily-cycling pH (a measure of acidity) did not affect Dermo disease infection levels in conjunction with daily-cycling hypoxia or with continuous normal oxygen […]

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Working to Reduce Toxic Blue-Green Algal Blooms in Chesapeake Bay

NCCOS-sponsored researchers recently explored several promising techniques to mitigate toxic cyanobacteria (blue-green algae) blooms in the Chesapeake Bay region. The team focused on sediment-flocculation, in which local sediments and commercial clays are combined with the flocculating compound chitosan to sink and bury Microcystis cyanobacteria blooms. Other techniques evaluated included post-bloom flushing and early spring deployment of […]

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NOAA and Partners Issue 2013 Dead Zone Predictions for Gulf of Mexico and Chesapeake Bay

Today, NOAA and partners issued the 2013 dead zone predictions for two of the nation’s most hypoxia-impacted bodies of water: the Gulf of Mexico and the Chesapeake Bay. The Gulf of Mexico hypoxic “dead” zone is predicted to be large this year, with an area ranging from 7,286 to 8,651 square miles. The upper end would […]

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NCCOS’ Nutrient Modeling Work in Long Island Sound May Be Adapted to Chesapeake Bay Management

At two recent meetings in Annapolis ( Shellfish Aquaculture Conference April 8 and Chesapeake Bay Program April 9-10, 2013), NCCOS’ researchers gave presentations on work within Long Island Sound and Great Bay Piscataqua Estuaries, with a description of the Farm Aquaculture Resource Management (FARM; model which helps to assess shellfish aquaculture’s removal of particles and […]

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