A century ago, seagrass beds covered hundreds of acres of subtidal flats
of Boston Harbor. By the 1980's, these important nursery areas for young
fish and shellfish had all but vanished, victims of turbid water, viral
diseases, and excessive nutrients.
By the late 1990's, only a few isolated meadows remained. With the reduction in nutrients in the water and
the increase in clarity, especially in the South
Harbor, we are seeing signs that these necessary habitats have started recolonizing the Harbor floor.