 |
||
|
Great Lakes Monitoring |  |
 |
||
|
|
|
|
|||||||||
|
R/V Lake
Guardian Great minds, Great Lakes Limnology Sediments Air Indicators Fish Beach closings Plankton Biology Benthic invertebrates Data Projects
|
|
|
 |
Goal: Oxygen levels high enough (Target Level) to sustain healthy fishery. Status: Dissolved oxygen concentrations in late summer are still frequently depleted to stressful levels (less than 4 mg/liter). Trends: Duration of oxygen depletion is shorter than in the mid-1980's. Issues: Increasing phosphorus levels may hinder further improvements. |
For further information, please contact Dr. Paul Bertram at (312) 353-0153, bertram.paul@epa.gov
|
|
|
|
||
|
|
