Wetland Classification and Mapping of the Kenai Lowland, Alaska     Map Unit Descriptions   Ecosystem: Depression   Map Component: D1, D1c   Extent: D1: 136 wetland polygons; 1666.5 ha; 1.20% of wetland area; 0.82% of wetland polygons.  D1c: 7 wetland polygons; 0.7 ha; 0.00% of wetland area; 0.04% of wetland polygons.

 

A small D1 lake E of Suneva Lake, N of Nikiski (polygon 1239).

Wetland Indicators Type: Mineral or Peat under a lake or pond Average depth to water table: Water table above the surface Organic layer thickness: n/a Average depth to redoximorphic features: n/a Common Soils: n/a Common Plant communities: Mud sedge – Buckbean Sweetgale – Livid sedge Sphagnum moss - Creeping sedge Open water, with the obligate pond lily (Nuphar lutea) and other obligate emergents, such as  pondweed (Potomageton spp.) is also common.   NWI: L1UB2H HGM: Isolated Natural Lake

Accuracy assessment: 12 polygons interpreted as D1 on aerial photographs were field checked.  All 12 remained D1.

 

D1 is the map component in a depressional wetland dominated by standing water, including areas where the vegetation is emergent (rooted underwater, but growing above the surface).  Most commonly these are small ponds, not connected at or very near the surface with other wetlands, on late-Wisconsin aged moraines.  This component is most commonly found as a distinct unit, but it is also found in a concentrically arranged complex.  Concentric complexes include other depression map components, such as D2 and D3.  For example, a pond (D1) in the center of a depression, ringed by a sedge dominated component (D2), then a shrub or bluejoint grass (Calamagrostis canadensis) dominated component (D3) would be named a D1-3 wetland.

 

In Homer, the name: D1c refers to a created D1 wetland.