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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:

2506, 2022

Record heat in Gulf of Mexico, local lakes poses hurricane, health and fisheries threats

June 25th, 2022|Comments Off on Record heat in Gulf of Mexico, local lakes poses hurricane, health and fisheries threats

Mark Schleifstein | NOLA.com 25 June 2022 The record June heat wave in southern Louisiana, with water temperatures edging into the mid-90s on Friday in Lake Pontchartrain and along the Gulf Coast, is serving up a triple [...]

1006, 2022

EPA to give $60M to 12 states to help curb water pollution

June 10th, 2022|Comments Off on EPA to give $60M to 12 states to help curb water pollution

David Pitt | AP News 10 June 2022 DES MOINES, Iowa (AP) — The federal government said Friday that it will distribute $60 million among 12 states that have waterways that flow into the Mississippi [...]

306, 2022

The low-oxygen Gulf ‘dead zone’ could be three times the size of Rhode Island; here’s why

June 3rd, 2022|Comments Off on The low-oxygen Gulf ‘dead zone’ could be three times the size of Rhode Island; here’s why

Mark Schleifstein | NOLA.com 3 June 2021 The 2021 summertime "dead zone" along the Louisiana and Texas coast lines — an area of low to no oxygen that can kill fish and bottom-living organisms — [...]

2803, 2022

In Wisconsin: Stowing Mowers, Pleasing Bees

March 28th, 2022|Comments Off on In Wisconsin: Stowing Mowers, Pleasing Bees

Anne Readel | New York Times 28 March 2022 As I drove last May through Appleton, Wis., the small city offered up a series of idyllic scenes: children playing on tree-lined streets, couples walking their [...]