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 Doyle Rice / USA Today March 26, 2018 The annual “dead zone” in the Gulf of Mexico, which last year was the size of New Jersey, will continue for several decades, a new study said. A [...]
GULF OF MEXICO RESEARCH INITIATIVE MARCH 20, 2018 Researchers analyzed dissolved organic carbon from water column samples collected in five regions to establish baseline data about its relative persistence and cycling in the northern Gulf [...]
By Seth Borenstein / U.S. News January 4, 2018 Two new studies show global warming is making oceans sicker, depleting oxygen and harming coral reefs. Global warming is making the world's oceans sicker, depleting them [...]
By Damian Carrington / The Guardian January 4, 2018 Areas starved of oxygen in open ocean and by coasts have soared in recent decades, risking dire consequences for marine life and humanity Ocean dead zones [...]