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Lake Michigan ecosystem may crash: 'Doughnut' of phytoplankton disappearing
6. 9 2010 (06:22)
In 1998, Charlie Kerfoot discovered a "doughnut" of phytoplankton circulating in Lake Michigan, helping to feed the lake's famous fishery. Just 12 later, the doughnut is disappearing, and Kerfoot fears that the lake's ecosystem will crash, taking with it much of the fish biomass.
