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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.

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Gulf hypoxia in the news:

506, 2020

Dolphins in the Louisiana Bayou Keep Dying. A Reconstruction Plan Might Make It Worse.

June 5th, 2020|Comments Off on Dolphins in the Louisiana Bayou Keep Dying. A Reconstruction Plan Might Make It Worse.

Rocky Kistner / HUFF POST ENVIRONMENT 5 June 2020 Freshwater diversion projects that have divided environmental advocates are intended to save the coast but may imperil dolphins. Barataria Bay is a marshy jewel in the [...]

2802, 2020

Congressman requests $100M for La. fishing industry damaged by 2019 openings of Bonnet Carre Spillway

February 28th, 2020|Comments Off on Congressman requests $100M for La. fishing industry damaged by 2019 openings of Bonnet Carre Spillway

Rachael Thomas / WAFB 27 February 2020 BATON ROUGE, La. - Congressman Garret Graves has written a letter to the National Oceanic an Atmospheric Administration (NOAA) asking them to allocated the remaining $100 million in [...]

2401, 2020

Local groups give update on dead zone-related projects

January 24th, 2020|Comments Off on Local groups give update on dead zone-related projects

Halle Parker / Houma Today 24 January 2020 Representatives of several environmental groups shared updates Wednesday on projects aimed at shrinking the Gulf of Mexico’s annually recurring dead zone. Led by coordinator Doug Daigle, the Louisiana [...]

1401, 2020

LSU Professor: UN Climate Change Conference Report Foretells Oxygen Loss in the World’s Oceans

January 14th, 2020|Comments Off on LSU Professor: UN Climate Change Conference Report Foretells Oxygen Loss in the World’s Oceans

Christine Wendling / LSU News & Notes 14 January 2020 Oxygen loss in the world’s oceans, driven by climate change and nutrient pollution, is increasingly threatening fish species and disrupting ecosystems, according to a new [...]

2412, 2019

Worldʼs Oceans Are Losing Oxygen Rapidly, Study Finds

December 24th, 2019|Comments Off on Worldʼs Oceans Are Losing Oxygen Rapidly, Study Finds

Kendra Pierre-Louis / The New York Times 7 December 2019 The world’s oceans are gasping for breath, a report issued Saturday at the annual global climate talks in Madrid has concluded. The report represents the [...]