What is hypoxia?
Hypoxia, or low oxygen, is an environmental phenomenon where the concentration of dissolved oxygen in the water column decreases to a level that can no longer support living aquatic organisms. Hypoxic areas, or “Dead Zones,” have increased in duration and frequency across our planet’s oceans since first being noted in the 1970s.
The largest hypoxic zone currently affecting the United States, and the second largest hypoxic zone worldwide, is the northern Gulf of Mexico adjacent to the Mississippi River.
Gulf hypoxia in the news:
NOAA News July 31, 2018 Persistently strong westerly winds and waves likely led to smaller than expected zone size NOAA-supported scientists have determined that this year’s Gulf of Mexico “dead zone”— an area of low [...]
USDA News Release July 19, 2018 WASHINGTON, July 19, 2018 – The U.S. Department of Agriculture (USDA) today announced plans to extend two of its landmark water quality initiatives for five years. The Mississippi River [...]
Doug Daigle, a research associate of Louisiana State University’s Department of Oceanography and Coastal Sciences and coordinator of the Louisiana Hypoxia Working Group (far right), takes notes today during a meeting on the Nicholls [...]
Iowa's contribution to Mississippi River basin nitrate levels. (Photo: Lyndsey Nielsen/USA Today Network) Register Editorial Board / Des Moines Register June 28, 2018 Iowa Natural Resources Trust offers best solution to reduce farm [...]
Steve Hardy / The Advocate June 7, 2018 Once again, the Gulf of Mexico "dead zone" must be measured in the size of a U.S. state. LSU scientists predict this summer's iteration will exceed the [...]