Spring 2007 Update: Historic Phytoplankton Cycles-Gulf of Maine
There has been considerable variation in the phytoplankton cycles of the Gulf of Maine. Most notably, the variation in the concentration and duration of the spring and fall blooms. In all years a spring bloom has developed, thought in some years it has been of very short duration (1998, 2001, 2004) versus some years where the bloom was of long duration (2000, 2002, 2005). There is no obvious trend in the development of the spring bloom. The fall bloom has failed to develop in some recent years (2003, 2004), which combined with the evidence of short duration fall blooms (2002, 2005, 2006) suggest the fall bloom has declined over the time period.