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News and Features by Region Louisiana Archives » News and Features

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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New Research Defines Origin and Dynamic Behavior of Gulf of Mexico Dead Zone

Reducing the size of the widespread area of hypoxia (low oxygen) in the northern Gulf of Mexico—known as the “Dead Zone”—represents one of the nation’s crucial water management challenges. Recent NCCOS-sponsored research has led to the development of a new tool to assess hypoxia formation and its response to key physical and biological drivers. Dr. […]

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Common Brevetoxin Metabolite Found in Gulf of Mexico Oysters May Not be a Health Risk

Brevetoxin B2—an abundant shellfish metabolite of brevetoxin found in Gulf of Mexico oysters—does not readily pass through an intestinal barrier, rendering it unlikely to cause neurotoxic shellfish poisoning. The B2 metabolite is produced by oysters and many other animals by attaching the amino acid cysteine to the brevetoxin that is consumed by shellfish during blooms […]

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2013 Gulf of Mexico Dead Zone Size Above Average But Not Largest

National Centers for Coastal Ocean Science supported scientists have documented that the 2013 “dead zone”(area of hypoxia, or low oxygen) in the northern Gulf of Mexico west of the Mississippi River delta now covers at least 5,800 square miles of sea floor or about the size of the State of Connecticut. This dead zone area […]

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Low Levels of Chemical Contaminants Found in Sediments of the Northwestern Gulf of Mexico

A new report is available summarizing the findings of an NCCOS-funded survey of sediments and overlying waters of the northwest Gulf of Mexico continental shelf, conducted in August 2011. The study found no evidence of biological impacts linked to poor sediment quality. Low values of species richness and diversity of sediment-dwelling benthic organisms were associated […]

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Research Shows Shellfish Metabolism of Red Tide Toxin Can Change the Outcome of Poisoning

As recent as 2012, the State of Texas was impacted by the longest red tide on record, leading to the collapse of its oyster industry and  the Governor to seek disaster assistance from the U. S. Department of Commerce. A new study published in the American Chemical Society journal: Chemical Research in Toxicology shows that in animals the […]

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Two Studies Show Mississippi River Diversions Could Harm Marshland

For decades, those leading efforts to keep southeast Louisiana from being swallowed by the Gulf of Mexico have supported “Putting the river back into the marsh.” The thinking is that the river should be allowed to build new land, just as it had done for millennia before flooding was controlled. But what if pollutants in the […]

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Spring Floods May Increase This Year’s Gulf of Mexico Dead Zone

To develop an earlier prediction of the size of the Gulf of Mexico “dead zone” this summer, NOAA’s National Weather Service and National Ocean Service combined data from the National Hydrologic Assessment U.S. Spring Flood Risk Outlook with knowledge of soil saturation and typical weather patterns throughout the Mississippi watershed this year. Based on estimates of flood risk, snow pack, […]

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