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-Dissolved oxygen is a
measure of the concentration of oxygen dissolved in the water column. Dissolved oxygen is influenced by a
variety of factors, including
lake basin, depth,and nutrient levels, but most importantly by temperature.
Cold water holds more oxygen than warm water. As Jess just described, in the summer months, due to
stratification, the bottom layer of water-the hypolimnion, can become oxygen
depleted, or anoxic, with oxygen
levels below 1ppm..
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