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News and Features by Region Louisiana Archives - News and Features

Workshop Explores Fisheries Management in Face of Mississippi River Diversions and Hypoxia

Last month’s Fifth Annual Gulf of Mexico Hypoxia Research Coordination Workshop continued its tradition of advancing the science that informs fisheries and resource managers about the effects of Gulf hypoxia (low dissolved oxygen). The workshop also provided a forum to assess and predict the potential ecological and socioeconomic effects of Mississippi River diversions. Large-scale ecosystem […]

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Red Tide Toxin Metabolite Accumulates in Organs, May Pose Greater Risk to Shellfish Consumers

In 2012, the state of Texas experienced the longest red tide on record, leading to a collapse of its oyster industry. Red tides in the Gulf of Mexico affect humans, wildlife, fisheries, and the regional tourist-related economy. They are caused by the harmful algae Karenia brevis, which release a neurotoxin called brevetoxin that accumulates in exposed shellfish and […]

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Average 2014 Gulf of Mexico ‘Dead Zone’ Confirms NOAA-supported Forecast

National Centers for Coastal Ocean Science supported scientists documented that the 2014 “dead zone” (area of hypoxia, or low oxygen) in the northern Gulf of Mexico west of the Mississippi River delta now covers 5,052 square miles of sea floor, or about the size of the state of Connecticut. Though average in size and smaller than last year, […]

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

Scientists are expecting an average, but still large, hypoxic or “dead zone” in the Gulf of Mexico this year, and a slightly above-average hypoxic zone in the Chesapeake Bay. NOAA-supported modeling is forecasting this year’s Gulf of Mexico hypoxic (very low oxygen) zone to cover an area ranging from 4,633 to 5,708 square miles (12,000 […]

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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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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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