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:
By Sara Sneath | The Times-Picayune October 5, 2017 Researchers have measured the dead zone growing along the Louisiana and Texas coasts during the summer months since 1985. This year, one of those researchers carried [...]
"Largest" dead zone recorded in U.S. threatens marine life Air Date: 08/16/17 The largest dead zone ever recorded in the U.S. has appeared in the Gulf of Mexico. It is primarily caused by fertilizer and [...]
World Events, Hope Dealers, The Dead Zone Originally aired: Aug 14, 2017 Guest: Nancy Rabalais, PhD, Professor, Department of Oceanography and Coastal Sciences, Shell Oil Endowed Chair in Oceanography/Wetland Sciences, Louisiana State University, Distinguished Research [...]
By The Times-Picayune Editorial Board August 6, 2017 Sixteen years after voluntary limits on fertilizer went into effect, the dead zone in the Gulf of Mexico this year is the largest since scientists began measuring it in [...]