Lake George Dissolved Oxygen
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Important for
biological activity
•
2001 readings from
10 to 0 ppm
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Oxygen depletion in
hypolimnion
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Implications for
fisheries
DO is necessary for aquatic life forms
Describe axis, top is the surface, and going down with increasing depth
Review stratification - upper levels = epilimnion not much change, then area of rapid decline, and lower levels of low oxygen
these values were all obtained in late summer before turnover
Trend of greater levels of oxygen depletion over the years in the deep waters of Lake George
Fish require between 5 - 6 ppm (explain ppm)
Coldwater fish avoid <5 ppm
