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Plate 12.— Two habitats lie at the edge of this manmade breakwater. Classification of upper (lighter) zone: SYSTEM Estuarine, sub- 

 system Intertidal, class Rocky Shore, subclass Rubble, water regime Irregularly Flooded, water chemistry Euhaline, 

 SPECIAL modifier Artificial. Classification of lower (darker) zone: system Estuarine, subsystem Intertidal, class Aquatic Bed, 

 subclass Algal, dominance type Funis vesiculosus, water regime Regularly Flooded, water chemistry Euhaline, special 

 modifier Artificial. (Washington County, Rhode Island; July 1977; Photo by F. C. Golet) 



