Login Contact
Glossary Definition
Find a Species Booklet
Find a specific species by name or taxonomic group.
Glossary Definition
Species Report
Run pre-made reports that search based on one or two fields.
Glossary Definition
Database Query
Run custom reports that search on up to eight commonly-used fields.
Glossary Definition
Power Search
Run custom reports that search on any of the BISON-M database fields.
  Home About Partners Disclaimer Privacy Policy Links State Map Help

  Reports LIVE DATA ENTRY

Database

Replication

User Information

Data Center

 

Home > Code Tables > Code Table List

Code Table List


See bottom of page for related code tables.

National Wetlands Inventory Codes

 CodeDescription
 EDIT LacustrineIncludes wetland and deepwater habitats with all of the following characteristics: (1) situated in a topographic depression or a dammed river channel; (2) lacking trees, shrubs, persistent emergents, emergent mosses or lichens with greater than 30% areal coverage; and (3) total area exceeds 8 hectares (20 acres). Similar wetland and deepwater habitats totaling less than 8 hectares are also included if an active wave-formed or bedrock shoreline feature makes up all or part of the boundary, or if the deepest part of the basin exceeds 2 m (6.6 feet) at low water. Lacustrine waters may be tidal or nontidal, but ocean-derived salinity is always less than 0.5 ppt.
 EDIT Lacustrine, limneticAll deepwater habitats within the Lacustrine System. Many small Lacustrine systems have no Limnetic Subsystem.
 EDIT Lacustrine, littoralAll wetland habitats in the Lacustrine System. Extends from the shoreward boundary of the system to a depth of 2 m (6.6 feet) below low water or to the maximum extent of nonpersistent emergents, if these grow at depths greater than 2 m.
 EDIT PalustrineIncludes all nontidal wetlands dominated by trees, shrubs, persistent emergents, emergent mosses or lichens, and all such wetlands that occur in tidal areas where salinity due to ocean-derived salts is below 0.5 ppt. It also includes wetlands lacking such vegetation, but with all of the following 4 characteristics: 1) area < 8 hectare (20 acres); 2) active wave-formed or bedrock shoreline features lacking; 3) water depth in the deepest part of basin less than 2m at low water; and 4) salinity due to ocean-derived salts < 0.5 ppt.
 EDIT RiverineIncludes all wetlands and deepwater habitats contained within a channel, with two exceptions: (1) wetlands dominated by trees, shrubs, persistant emergents, emergent mosses, or lichens, and (2) habitats with water containing ocean-derived salts in excess of 0.5 ppt. A channel is "an open conduit either naturally or artificially created which periodically or continuously contains moving water, or which forms a connecting link between two bodies of standing water" (Langbein and Iseri 1960:5).
 EDIT Riverine, tidalThe gradient is low and water velocity fluctuates under tidal influence. The streambed is mainly mud with occasional patches of sand. Oxygen deficits may sometimes occur and the fauna is similar to that in the Lower Perennial Subsystem. The floodplain is typically well developed.
 EDIT Riverine, lower perennialThe gradient is low and water velocity is slow. There is no tidal influence, and some water flows throughout the year. The substrate consists mainly of sand and mud. Oxygen deficits may sometimes occur, the fauna is composed mostly of species that reach their maximum abundance in still water, and true planktonic organisms are common. The gradient is lower than that of the Upper Perennial Subsystem and the floodplain is well-developed.
 EDIT Riverine, upper perennialThe gradient is high and velocity of the water fast. There is no tidal influence and some water flows throughout the year. The substrate consists of rock, cobbles, or gravel with occasiona patches of sand. The natural dissolved oxygen concentration is normally near saturation. The fauna is characteristic of running water, and there are few or no planktonic forms. The gradient is high compared with that of the Lower Perennial Subsystem, and there is very little floodplain development.
 EDIT Riverine, intermittentThe channel contains nontidal flowing water for only part of the year. When the water is not flowing, it may remain in isolated pools or surface water may be absent.
 EDIT Riverine, unknown perennialSee R2 and R3 for information.
 EDIT Upland 


Related Code Tables