M-Marine 1. Subtidal RB-Rock 1. Bedrock 2. Rubble UB-Unconsolidated Bottom 1. Cobble Gravel 2. Sand 3. Mud 4. Organic AB-Aquatic Bed 1. Algal 3. Rooted Vascular 5. Unknown Submergent RF-Reef 1. Coral 3. Worm OW-Open Water/Unknown Bottom 2. Intertidal AB-Aquatic Bed 1. Algal 3. Rooted Vascular 5. Unknown Submergent RF-Reef 1. Coral 2. Worm RS-Rocky Shore 1. Coral 3. Worm US-Unconsolidated Shore 1. Cobble Gravel 2. Sand 3. Mud 4. Organic E-Estuarine 1. Subtidal RB-Rock Bottom 1. Bedrock 2. Rubble UB-Unconsolidated Bottom 1. Cobble Gravel 2. Sand 3. Mud 4. Organic AB-Aquatic Bed 1. Algal 3. Rooted Vascular 4. Floating Vascular 5. Unknown Submergent 6. Unknown Surface RF-Reef 2. Mollusc 3. Worm OW-Open Water/Unknown Bottom 2. Intertidal AB-Aquatic Bed 1. Algal 3. Rooted Vascular 4. Floating Vascular 5. Unknown Submergent 6. Unknown Surface RF-Reef 2. Mollusc 3. Worm SB-Streambed 1. Cobble-Gravel 2. Sand 3. Mud 4. Organic RS-Rocky Shore 1. Bedrock 2. Rubble US-Unconsolidated Shore 1. Cobble-Gravel 2. Sand 3. Mud 4. Organic EM-Emergent 1. Persistent 2. Nonpersistent SS-Scrub-Shrub 1. Broad Leaved Deciduous 2. Needle-Leaved Deciduous 3. Broad-Leaved Evergreen 4. Needle-Leaved Evergreen 5. Dead 6. Deciduous 7. Evergreen FO-Forested 1. Broad Leaved Deciduous 2. Needle-Leaved Deciduous 3. Broad-Leaved Evergreen 4. Needle-Leaved Evergreen 5. Dead 6. Deciduous 7. Evergreen R-Riverine 1. Tidal 2. Lower Perennial 3. Upper Perennial 4. Intermittent 5. Unknown Perennial RB-Rock 1. Bedrock 2. Rubble UB-Unconsolidated Bottom 1. Cobble-Gravel 2. Sand 3. Mud 4. Organic SB-Streambed 1. Bedrock 2. Rubble 3. Cobble-Gravel 4. Sand 5. Mud 6. Organic 7. Vegetated AB-Aquatic Bed 1. Algal 2. Aquatic Moss 3. Rooted Vascular 4. Floating Vascular 5. Unknown Submergent 6. Unknown Surface RS-Rocky Shore 1. Bedrock 2. Rubble US-Unconsolidated Shore 1. Cobble-Gravel 2. Sand 3. Mud 4. Organic 5. Vegetated EM-Emergent 2. Nonpersistent OW-Open Water/Unknown Bottom L- Lacustrine 1. Limnetic RB-Rock Bottom 1. Bedrock 2. Rubble UB-Unconsolidated Bottom 1. Cobble-Gravel 2. Sand 3. Mud 4. Organic AB-Aquatic Bed 1. Algal 2. Aquatic Moss 3. Rooted Vascular 4. Floating Vascular 5. Unknown Submergent 6. Unknown Surface OW-Open Water/Unknown Bottom 2-Littoral RB-Rock Bottom 1. Bedrock 2. Rubble UB-Unconsolidated Bottom 1. Cobble-Gravel 2. Sand 3. Mud 4. Organic AB-Aquatic Bed 1. Algal 2. Aquatic Moss 3. Rooted Vascular 4. Floating Vascular 5. Unknown Submergent 6. Unknown Surface RS-Rocky Shore 1. Bedrock 2. Rubble US-Unconsolidated Shore 1. Cobble-Gravel 2. Sand 3. Mud 4. Organic 5. Vegetated EM-Emergent 2. Nonpersistent OW-Open Water/Unknown Bottom P-Palustrine RB-Rock Bottom 1. Bedrock 2. Rubble UB-Unconsolidated Bottom 1. Cobble-Gravel 2. Sand 3. Mud 4. Organic AB-Aquatic Bed 1. Algal 2. Aquatic Moss 3. Rooted Vascular 4. Floating Vascular 5. Unknown Submergent 6. Unknown Surface US-Unconsolidated Shore 1. Cobble-Gravel 2. Sand 3. Mud 4. Organic 5. Vegetated ML-Moss-Lichen 1. Moss 2. Lichen EM-Emergent 1. Persistent 2. Nonpersistent SS-Scrub-Shrub 1. Broad-Leaved Deciduous 2. Needle-Leaved Deciduous 3. Broad-Leaved Evergreen 4. Needle-Leaved Evergreen 5. Dead 6. Deciduous 7. Evergreen FO-Forested 1. Broad-Leaved Deciduous 2. Needle-Leaved Deciduous 3. Broad-Leaved Evergreen 4. Needle-Leaved Evergreen 5. Dead 6. Deciduous 7. Evergreen OW-Open Water/Unknown Bottom Modifiers Water Regime Non-Tidal A Temporary Flooded B Saturated C Seasonally Flooded D Seasonally Flooded/Well Drained E Seasonally Flooded/Saturated F Semipermanently Flooded G Intermittently Exposed H Permanently Flooded J Intermittently Flooded K Artificially Flooded W Intermittently Flooded/Temporary Y Saturated Semipermanent/Seasonal Z Intermittently Exposed/Permanent U Unknown Tidal K Artificially Flooded L Subtidal M Irregularly Exposed N Regularly Flooded P Irregularly Flooded S Temporary-Tidal R Seasonal-Tidal T Semipermanent-Tidal V Permanent-Tidal U Unknown Water Chemistry Coastal Halinity 1. Hyperhaline 2. Euhaline 3. Mixohaline (Brackish) 4. Polyhaline 5. Mesohaline 6. Oligohaline 0. Fresh Inland Salinity 7. Hypersaline 8. Eusaline 9. Mixosaline 0. Fresh pH Modifers for all Fresh Water a Acid t Circumneutral l Alkaline Soil g Organic n Mineral Special Modifiers b Beaver d Parially Drained/Ditched f Farmed h Diked/Impounded r Artificial Substrate s Spoil x Excavated