Wetland Classification and Mapping
of Seward, Alaska
Map Unit Descriptions
Ecosystem: Headwater Fen
Map Component: H4
Seward Area Extent: 12 wetland polygons; 24.6 acres
An H4 wetland on the glacier-cut bedrock bench above Fourth of July Creek.
Type: Mineral soil
Depth to water table: 28 cm on 28 August 2006 at the one site measured
Organic layer thickness: 13 cm at the one site measured
Depth to redoximorphic features: 20 cm at the one site measured
Common Soils: Typic Cryaquents
Common Plant communities:
Mountain hemlock / early blueberry (Tsuga mertensiana / Vaccinium ovalifolium)
Mountain hemlock / early blueberry- rusty menziesia (Tsuga mertensiana / Vaccinium ovalifolium - Menziesia ferruginea)
HGM: Terrene Basin groundwater-dominated Throughflow headwater.
H4 is the forested Headwater Fen Ecosystem wetland component, with a deeper water table. Seward area Headwater Fens are only mapped on the 800' elevation glacier-cut bedrock bench above Fourth of July Creek. This Headwater Fen component commonly occurs alone or with the sloping fewflower sedge-dominated component (H3).
There is much evidence of old timber-cutting activity in the forested headwater fens above Fourth of July Creek. Some areas appear to have been nearly clear-cut many years ago.
|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 15:18