Wetland Classification and Mapping
of Seward, Alaska
Map Unit Descriptions
Ecosystem: Headwater Fen
Map Component: H3
Seward Area Extent: 7 wetland polygon; 16.2 acres
A sloping H3 peatland on the glacier-cut bedrock bench above Fourth of July Creek.
Average depth to water table: unk.
Organic layer thickness: 104 cm at the one site measured
Average depth to redoximorphic features: n/a
Common Soils: Terric Cryosaprists
Common Plant communities:
Fewflower sedge (Carex pauciflora)
Fewflower sedge - tall cottongrass (Carex pauciflora - Eriophorum angustifolium)
HGM: Terrene Basin groundwater-dominated Throughflow headwater.
H3 is the Headwater Fen Ecosystem wetland component with a slightly deeper water table at or very near the surface, dominated by fewflower sedge. Seward area Headwater Fens are only mapped on the 800' elevation glacier-cut bedrock bench above Fourth of July Creek. There peatlands are sloping fens, as steep as 10%. They are relatively poor in species composition compared to similar, steeper fens found to the east in Prince William Sound. This is the most abundant Headwater Fen component; often occurring with the forested (H4) or wetter (H2) component.
|Contact: Mike Gracz Kenai Watershed Forum Homer Field Office Old Town Professional Center 3430 Main Street Suite B1 Homer, AK 99603 907-235-2218||
12 February 2007 15:17