Watershed Pollution

Nitrite Pollution Increase in Ocean Water

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Researchers have more than once warned of “dead zones” and toxic algal blooms as a consequence of changing climatic conditions. Ocean temperatures are increasing, and this in turn encourages a new set of biochemical processes.

Professor Hollibaugh and a colleague report in the journal Environmental Science and Technology that over the course of eight summers they measured peaks of nitrite, alongside massive increases in the numbers of the microorganisms that produce it, in coastal waters off Georgia.

Pollution reaches the Mariana Trench

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The amphipods were contaminated with PCBs — polychlorinated biphenyls — toxic chemicals used for decades in industry, as well as other industrial pollutants known as persistent organic pollutants.

“Every sample we had,” Jamieson says, “had contaminants in it at very high or extraordinarily high levels.”

Concern Over “Sustained” Man-Made Hypoxia

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The gulf dead zone is only one piece of a larger, environmental problem with U.S. agriculture and watershed issues, however. The gulf just happens to be one of the areas where effects of agricultural practices and pollution are more visible. These kind of problems, though, are far reaching, effect the whole country and are heavily tied to government and industry.