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:
Brian Kahn / Earther 27 March 2019 Photo: Getty The byzantine networks of rivers and streams that drain the Midwest is facing a flooding crisis of historic proportions. The multibillion disaster centered in [...]
Steve Hardy / The Advocate 21 March 2019 The Mr. Andre', a DAL-CO Marine Services supply boat, passes in front of the Louisiana State Capitol, seen across the Mississippi River from the Old Ferry [...]
Erin Jordan / The Gazette 3 December 2018 Chapter 1: America’s Midwest faces worsening trouble with undrinkable well water, recreational lakes choked with toxic algae and water treatment plants requiring budget-busting upgrades to remove pollution [...]
Erin Jordan / The Gazette2 December 2018 'They need to say it's against the law to pollute downstream' Tommy Olander Jr. on Aug. 9 drives his family's shrimping boat in Vermillion Bay off the Louisiana [...]
It’s not easy to push an alligator around, but hurricanes have been known to move them miles from home. Shown here is a resident of Everglades National Park, Florida. Photograph by Keith Ladzinski, National [...]