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What dissolved oxygen concentrations classify a water body as "hypoxic"? b. What are the two primary nutrients that cause hypoxia? c. By what mechanism does the addition of these nutrients cause hypoxia? List each step beginning with the addition of nutrients and ending with a decrease in dissolved oxygen concentrations. d. List the four sources of nutrients that contribute to the hypoxic zone in the Gulf of Mexico.
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What dissolved oxygen concentrations classify a water body as "hypoxic"? b. What are the two primary...
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