Dead Zones Resulting From Hypoxia And Anoxia. Dead zones are hypoxic areas in the worlds oceans and large lakes which causes these bodies of water to fail to support the marine life living there. Areas particularly prone to this include shallow waters of semi-enclosed water bodies such as the Waddenzee or the Gulf of Mexico where land run-off is substantial.
These chemicals are the fundamental building blocks of single-ce lled plant-like organisms that live in the water column and whose growth is limited in part by the availability of these materials. Hypoxia and anoxia severely affect coastal benthic ecosystems resulting in long-term changes in benthic communities and extensive so-called dead zones Rabalais et al. Most documented dead zones are in temperate regions but recent evidence suggests that most hypoxic ecosystems in the tropics are yet to be discovered.
Dead zones are low-oxygen or hypoxic areas in the worlds oceans and lakesBecause most organisms need oxygen to live few organisms can survive in hypoxic conditions.
Areas particularly prone to this include shallow waters of semi-enclosed water bodies such as the Waddenzee or the Gulf of Mexico where land run-off is substantial. Currently dead zones have been reported in more than 400 systems worldwide Diaz Rosenberg 2008. Although the hypoxia forecast had a root mean squared deviation of 288 km 3 the early summer and late summer anoxia forecasts had a root mean squared deviation of 091 and 046 km 3 respectively which is proportionately larger than that for hypoxia. - In these areas a so-called dead zone can be created.