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The UN Environment Programme reported 146 dead zones in 2004 in the world's oceans where marine life could not be supported due to depleted oxygen levels. Some of these were as small as a square kilometer (0.4 mi 2 ), but the largest dead zone covered 70,000 square kilometers (27,000 mi 2 ).
Dead zones are hypoxic, meaning the water has very low levels of dissolved oxygen. This kills off marine life or forces it to leave the area, removing life from the area and giving it the name dead zone. Hypoxic zones or dead zones can occur naturally, but nutrient pollution from human activity has turned this natural process into an ...
Red circles show the location and size of many dead zones (in 2008). Black dots show dead zones of unknown size. The size and number of marine dead zones—areas where the deep water is so low in dissolved oxygen that sea creatures cannot survive (except for some specialized bacteria)—have grown in the past half-century. [19]
A 'dead zone' off the Gulf coast is larger than NOAA predicted. The massive area poses danger to marine life, and recovery could take decades.
(NOAA/LUMCON/LSU) A "dead zone," or an area of low to no oxygen, in the Gulf of Mexico has grown larger than Connecticut, creating an uninhabitable environment for some commercial marine life, and ...
Every spring, an area appears when the water doesn't have enough oxygen to support fish and other marine life. Skip to main content. News. 24/7 help. For premium support please call: ...
The dead zone at the outlet of the Mississippi River is a consequence of nitrates from fertilizer being carried off agricultural fields and funnelled down the river system to the Gulf of Mexico. Runoff also plays a part in the carbon cycle , again through the transport of eroded rock and soil.
“Sharks of the Dead Zone,” which premieres at 9 p.m. Friday as part of Discovery’s Shark Week, sounds a bit frightening.And it is, if you care about the health of our planet. The host of the ...