Search results
Results From The WOW.Com Content Network
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 ).
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]
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 ...
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: ...
“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 ...
(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 ...
Apart from possible atmospheric effects, many deeper-dwelling marine organisms could not adapt to an ocean where oxygen penetrated only the surface layers. [ citation needed ] An economically significant consequence of oceanic anoxic events is the fact that the prevailing conditions in so many Mesozoic oceans has helped produce most of the ...
The Atlantic Ocean is teeming with life, but for the first time researchers have discovered dead zones in these waters - areas low in both oxygen and salinity - off the coast of Africa. Fish can't ...