During the month-long survey, scientists will collect samples of water and small aquatic organisms like plankton, critical species in the lower food web. Data gathered on the annual surveys enables EPA and partner agencies to assess how invasive species and algal blooms affect fisheries and water quality to better protect the Great Lakes for drinking water, fishing and recreation. The survey will sample the lakes when warmer surface water overlays colder bottom water—conditions which influence nutrient and oxygen levels, algal growth, organism distributions and fish habitat. Scientists will also collect a variety of water quality measurements to verify and improve algorithms used for the satellite-based measurements which complement EPA’s ship-based monitoring surveys.
To learn more, read the full press release on EPA’s website: EPA’s Research Vessel Lake Guardian Begins Summer Survey of Great Lakes.