The zooplankton in Lakes Michigan and Huron shifted dramatically from 1997 to 2016, according to the study recently published in the Journal of Great Lakes Research and funded by the EPA’s Great Lakes National Program Office. Research from 2018 shows that although plankton populations changed much more dramatically in Lake Huron, Lake Michigan has far more mussels. Later, Michigan stocked fewer Lake Michigan salmon after plankton, alewife and salmon levels crashed in Lake Huron around 2004.