Working Draft Framework, Version 2, June 4, 1996
Definition Source: Classification of Wetlands and Deepwater Habitats of the United States
1.2.4.1.3.1 Rocky Marine Bottom: Those marine ecosystems within wetland and deepwater systems with substrates having an areal cover of stones, boulders , or bedrock 75% or greater, and vegetative cover of less than 30%. (Definition Source: Classification of Wetlands and Deepwater Habitats of the United States)
1.2.4.1.3.2 Subtidal Marine Aquatic Bed: Those subtidal marine ecosystems within wetlands and deepwater habitats dominated by plants that grow primarily on or below the surface of the water for most of the growing season in most years. (Definition Source: Classification of Wetlands and Deepwater Habitats of the United States)
1.2.4.1.3.3 Subtidal Marine Reef: Those subtidal marine ecosystems dominated by ridge-like or mound-like structures formed by the colonization and growth of extensive exoskeleton building sessile invertebrates. Reefs include areas that are subtidal, irregularly exposed, regularly flooded, and irregularly flooded. Reefs are characterized by their elevation above the surrounding substrate and their interference with normal wave flow. This also includes large deposits of rock that are elevated above the surrounding substrate and change current flow. (Definition Source: Classification of Wetlands and Deepwater Habitats of the United States)
1.2.4.1.3.4 Unconsolidated Marine Bottom: Those marine ecosystems within wetland and subtidal systems with at least 25% cover of particles smaller than stones, and a vegetative cover less than 30%. (Definition Source: Classification of Wetlands and Deepwater Habitat of the United States)