Table 1. Systems, Classes, and Subclasses with Examples of Dominance Types. 



System, Class, and Subclass 



Examples of Dominance Types 



Marine 

 Rock Bottom 



Bedrock 



Rubble 

 Unconsolidated Bottom 



Cobble-Gravel 



Sand 



Mud 



Organic 

 Aquatic Bed 



Rooted Vascular 



Algal 

 Reef 



Coral 



Worm 

 Rocky Shore 



Bedrock 



Rubble 

 Unconsolidated Shore 



Cobble-Gravel 



Sand 



Mud 



Organic 

 Estuarine 

 Rock Bottom 



Bedrock 



Rubble 

 Unconsolidated Bottom 



Cobble-Gravel 



Sand 



Mud 



Organic 

 Aquatic Bed 



Algal 



Rooted Vascular 



Floating 

 Reef 



Mollusk 



Worm 

 Streambed 



Cobble-Gravel 



Sand 



Mud 



Organic 

 Rocky Shore 



Bedrock 



Rubble 

 Unconsolidated Shore 



Cobble-Gravel 



Sand 



Mud 



Organic 

 Emergent Wetland 



Persistent 



Nonpersistent 

 Scrub-Shrub Wetland 



Needle-leaved Evergreen 



Broad-leaved Evergreen 



Needle-leaved Deciduous 



Broad-leaved Deciduous 



Dead 



American lobster {Homarus americanus) 

 Encrusting sponge {Hippospongia gossypina) 



Brittle star (Amphipholis squamata) 



Great Alaskan tellin {Tellina lutea) 



Atlantic deep-sea scallop {Placopecten magellanicus) 



Clam worm {Nereis succinea) 



Turtle grass {Thalassia testudinum) 

 Kelp {Maerocystis pyrifera) 



Coral {Pontes pontes) 



Reef worm {Sabellaria cementarium) 



Gooseneck barnacle {Pollicipes polymerus) 

 California mussel {Mytilus californianus) 



Acorn barnacle {Balanus balanoides) 

 Pismo clam {Tivela stultorum) 

 Boring clam {Platyodon cancellatus) 

 False angel wing {Petricola pholadiformis) 



Sea whip {Muricea californica) 

 Tunicate {Cnemidocarpa finmarkiensis) 



Smooth Washington clam {Saxidomus giganteus) 

 Sand dollar {Dendraster excentricus) 

 Baltic macoma {Maeoma balthica) 

 Soft-shell clam {Mya arenaria) 



Rockweed \Fueus vesiculosus) 



Eelgrass {Zostera marina) 



Water hyacinth {Eichhornia crassipes) 



Eastern oyster {Crassostrea virginica) 

 Reef worm {Sabellaria floridensis) 



Blue mussel {Mytilus edulis) 



Red ghost shrimp {Callianassa californiensis) 



Mud snail (Nassarius obsoletus) 



Ribbed mussel {Modiolus demissus) 



Acorn barnacle {Chthamalus fragilis) 

 Plate limpet {Acmaea testudinalis) 



Blue mussel {Mytilus edulis) 

 Quahog {Mercenaria mercenaria) 

 Clam worm {Nereis succinea) 

 Fiddler crab {Uca pugnax) 



Saltmarsh cordgrass {Spartina alterniflora) 

 Samphire {Salicornia europea) 



Sitka spruce {Picea sitchensis) 

 Mangrove {Conocarpus erectus) 

 Bald cypress {Taxodium distichum) 

 Marsh elder {Iva frutescens) 

 None 



