Oxygen levels in areas of the Great South Bay seasonally dip below those needed to sustain life. Photo by KM/Creative Commons.

The results of a two-year study show that oxygen levels in the Great South Bay seasonally dip below levels needed to sustain life. Low dissolved oxygen is a result of nitrogen pollution, which, in Great South Bay, is largely originating from cesspools and septic systems.

This new evidence helps to explain previous observations of areas in the bay that are largely devoid of bottom dwelling sea-life, including hard clams and other shellfish.

Read more at nature.org.