Have you ever heard of dead aquatic areas? These are bodies of water near the coast inhabited by human intervention or oxygen levels are so low that natural aquatic life can live. Fish and other animals that roam in these areas die and there are no plants on the ocean floor. The scientists found dead zones in 1970. Since then, a recent study confirmed that in 2008 405 dead zones worldwide. Most of them are around populated areas. Dead zone, while in some cases, natural phenomena, are usually the result of water pollution. The reduction of dead zones is beneficial not only for the environment, but also the fishing industry, which depends on clean water for the production of healthy fish.
The largest dead zone is now in the Gulf of Mexico. Includes approximately 27,000 square kilometers, is the size of New Jersey. This region is a dead zone is caused by the applicant and the output of the Mississippi River. Dead zones are caused by pollution are generally created by chemical high in nitrogen. Examples include fertilizers and pesticides. When these chemicals are introduced, for example, Mississippi, downstream and the water end up in the Gulf. Once there, unicellular organisms such as plants that live in the sea to feed nitrogen in sealed containers. This is visible to the naked eye as "algae." Algae are known to deplete oxygen from the water through the process cellular respiration, which is the same way that the human body changes food into energy. Finally, the oxygen in the area that the algae are in bloom is used and all forms of aquatic life in this area is dead. Last year, in 2009, the dead zone in the Gulf of Mexico has declined due to weather conditions. Although this is generally a good thing, in this case, the decline means that instead of covering most of the ocean floor the area's largest dead zone vertically to the surface of the ocean, the pressure on the industry in February, fishing $ 8,000,000,000.
"Low oxygen levels recorded along the Gulf Coast of North America have led to reproductive problems in fish that will reduce the size of reproductive organs, the egg counts and the lack of spawn." These changes in fish have significant impact not only fisheries but also for the natural food chain in the Gulf. In combination with the recent issue of BP oil spill and the Gulf of Mexico to the ecosystem of the environment is in serious trouble.
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