Asked January 24, 2018, 11:42 AM EST

How does oxygen deplete in ponds where eutrophication has taken place?

Outside United States

1 Response

Under eutrophic conditions, dissolved oxygen greatly increases during the day, but is greatly reduced after dark by the respiring algae and by microorganisms that feed on the increasing mass of dead algae. When dissolved oxygen levels decline to hypoxic levels, fish and other marine animals suffocate.
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