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Prorocentrum minimum syn Exuviaella marie-lebouriae, Prorocentrum marie-lebouriae,
Prorocentrum triangulatum and Exuviaella minima

One of the most common spring phytoplankton bloomers in the Rhode River and the Chesapeake Bay. Blooms in the Rhode are frequently caused by large freshwater intrusions flowing down the bay from the Susquehanna River in Pennsylvania. Chlorophyll values exceeding 90 micrograms per liter have been recorded during these blooms. Average summer chlorophyll generally does not exceed 20 to 30 micrograms per liter.Click to read more about Prorocentrum minimum blooms. Size 15um wide, 22um long, total volume 2591.8. Temp. range1.4 to 31.43C, salinity range 0 to 16.4ppt. 
The Phytoplnakton Lab thru the Smithsonian Marine Science Network keeps a daily, hour by hour, log of the parameters of the waters at SERC's dock. Click here to see a graph showing the amount of chlorophyll in a bloom on April 30, 2012.