Map Unit Descriptions
Ecosystem: Tidal
Map Unit: TR
Extent: 24 wetland polygons; 250.1 ha; 0.29% of wetland area; 0.24% of wetland polygons.
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A small TR inclusion in a T1-4 unit near the cannery at the mouth of the Kenai River (polygon 8848). |
Wetland Indicators Type: Mineral or Organic Average depth to water table: not encountered at the three sites visited. Organic layer thickness: 4.5 cm; n= 2 sites Average depth to redoximorphic features: 10 cm; n= 3 sites. Common Soils: CLUNIE Common Plant communities: Marsh arrowgrass – Seaside arrowgrass
NWI: E2EM1P HGM: See Tidal Ecosystem Description |
TR wetlands are a complex of more than two, non-sequential Tidal map components. Often TR is found where tidal creeks and guts are large enough to map at 1:25, 000. In these units, a complex from the bare mud component (T0) to a component affected only by the highest tides such as, beachrye (Leymus mollis ssp. mollis; T7) or Lyngbye's sedge (Carex lyngbyei; T6) transitions rapidly through intermediate components such as the alkaligrass (Puccinellia spp.; T4) or Goosetongue (Plantago maritima; T3) components. TR complexes are also found at steeper margins of estuaries or lagoons, where the transition from areas flooded twice daily to areas affected by only the highest spring tides covers a short distance.
