49 



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Plate 4.— Two habitats are shown here. Classification of landward (lighter) zone: system Marine, subsystem Intertidal, CLASS 

 Rocky Shore, subclass Rubble, water regime Irregularly Flooded, water CHEMISTRY Euhaline. Classification of seaward (darker) 

 zone: SYSTEM Marine, subsystem Intertidal, class Aquatic Bed, subclass Algal, dominance type Fucus vesiculosus-Ascophylluvi 

 nodosum, water regime Regularly Flooded, water chemistry Euhaline. Most stones are larger than 30.5 cm (12 in) in diameter. 

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



