|Sphagnum moss – Manyflower sedge|
|Sphagnum spp. - Carex pluriflora|
|n = 7|
|III.A.3.j. Subarctic Lowland Sedge Bog Meadow|
|Ecosystem: Relict Lakebed / Drainageway|
The sphagnum moss - manyflower sedge community has been described for the Aleutian Islands by Hultén (1960) and on Chugach National Forest by DeVelice et. al. (1999).
Sphagnum moss (Sphagnum spp.) – manyflower sedge (Carex pluriflora) communities are uncommon on the Kenai Lowlands, but widespread. They occur on well-developed peat mats, with slightly deeper water tables, over relict glacial lakebeds. One sample site is on a larger depressional feature on a older modified moraine (of ‘Eklutna’ age Karlstrom (1964)) on the west slope of the Caribou Hills, and another is over a peat-filled kettle, in the kettle-kame country adjacent to the Old Sterling Highway, southeast of Anchor Point.
Spahgnum moss - manyflower sedge communities are characterized by a sparse vegetation layer dominated by manyflower sedge emerging from a continuous sphagnum mat. Dwarf birch (Betula nanacrowberry (Empetrum nigrumand bog rosemary (Andromeda polifolia) are present. Bog blueberry (Vaccinium uliginosum), cloudberry (Rubus chamaemorus) and bog cranberry (Vaccinium oxycoccos) are usually present, all in trace amounts.
The organic horizon is thick, thick enough to
qualify as an organic soil (greater than 40 cm, a histosol). The
water table can be near or at the surface, and was always
encountered within the first 14 inches (36 cm).
All sites visited are jurisdictional wetlands.
Table 1. Frequency of soil series occurrence and hydric status at NRCS holes. Bold type indicates soils on the NRCS Alaska hydric soils list.
Table 2. Summary of plant frequency and average cover for plants occurring
in more than 50% of plots.
Table 2. Summary of plant frequency and average cover for plants occurring in more than 50% of plots.
|Wetland Indicator Status|
|Betula nana||1.0||10.0||FAC||FAC, OBL|
|Empetrum nigrum||1.0||3.7||FAC||FACU, FACW
|Vaccinium uliginosum||0.9||4.7||FAC||FACU+, FACW
|Ledum palustre ssp. decumbens||0.7||2.0||FACW||FACW|
|Equisetum arvense||0.6||0.1||FAC*||FAC*, FACW-|
|Contact: Mike Gracz Kenai Watershed Forum PO Box 15301 Fritz Creek, AK 99603 907-235-2218||
Alaska Natural Heritage Program
and Natural Resource Institute
707 A Street, Suite 101
Anchorage, Alaska 99501
04 May 2007 10:02