The phytoplankton of the inland lakes of Pictured Rocks National Lakeshore include at least 51 taxa of blue-green algae (Cyanophyta), dinoflagellates (Pyrrhophyta), yellow-brown algae (Chrysophyta), diatoms (Bacillariophyta), and green algae (Chlorophyta). Seasonal fluctuations occur in the relative densities of these unicellular plants.
Did You Know?
On October 6, 1972, ceremonies in Munising marked the establishment of Pictured Rocks National Lakeshore, America's first national lakeshore. To symbolically link the park's two gateway communities of Munising and Grand Marais, water was poured from two glass containers into a third. More...