Hypoxic, which means low oxygen, and anoxic, which means there is no oxygen at all, have always been present and occur loosely in the deeper environments of the oceans. However, a rise in hypoxic and anoxic waters, ar on the rise in estuarine, and coastal locations in spokesperson because of an profit in activities by kind-hearteds (Diaz and Rosenberg 1995). The northern set off of the Gulf of Mexico contains the second largest coastal hypoxia in the world. This region is a good deal called the Dead Zone because of the failure to catch fish, shrimp, and crabs (Renaud 1986). This district has an increase of species which either become stressed or bomb due to the low oxygen levels for long periods of time. Ultimately this causes the habitats biodiversity to lower, and changes the expression function of the ecosystem (Rabalais et al. 2001). However, some organisms have satisfactory to these low or no oxygen waters, but the numbers of species who have adapted is far less than the species who have adapted (Rabaliais and Turner 2001a). Hypoxia is a great concern. Areas affected by hypoxia are increasing severally year in coastal and estuarine areas, due to an increase of nutrient over loading mostly likely caused by humans (Diaz and Rosenberg 1995). A hypoxic area is one of the conditions present in an eutrophic area.
A eutrophic area occurs when a rise in nutrients, ordinarily by phosphorus and nitrogen (Nixon 1995). This nutrient overloading is seen in areas where human populations have increased, expansion of farms along basins of rivers, and an increase in life force and food consumption (Nixon 1995). An over loading of nutrients can truly ecologically effect coastal waters. It can reduce airheaded penetration, increase macroalgae, reduction of aquatic habitat, cause hypoxia and anoxia, effect trophic reactions, and food webs (Vitousek...
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