|Sphagnum moss - Creeping sedge|
|Sphagnum spp. - Carex chordorrhiza|
|n = 10|
|III.A.3.j.(-k.) Subarctic Lowland Sedge (-Moss) Bog|
|Ecosystem: Relict Lakebed / Drainageway, Depression|
The sphagnum moss (Sphagnum spp.) - creeping sedge (Carex chordorrhiza) community found on the Kenai Lowlands is similar to the creeping sedge – buckbean (Menyanthes trifoliata) community described by Scheirel and Meyer (1977) for the Copper River delta, and the mud sedge (Carex limosa) – creeping sedge community described by Calmes (1976 in Viereck et. al., 1992) and Drury (1956), for interior Alaska, but lacks those other associates (buckbean and mud sedge, respectively). Both on Chugach National Forest (DeVelice et. al., 1999) and on the Copper River Delta (Boggs, 2000) “under-represented” creeping sedge types are named.
Sphagnum moss – creeping sedge often occurs on the lowest, wettest positions of various level relict glacial landforms including drainageways, lakebeds and depressions on recessional moraines.
A sparse to "woodland" density of creeping sedge occupies a sphagnum mat, often with standing water.
The organic mat is thick, often greater than 2 meters; it is always an organic soil (histosol). The water table is at or near the surface. pH ranges from very strongly acid to slightly acid depending on groundwater flow proximity to mineral soil contact. All 10 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
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.
|Wetland Indicator Status|
|Betula nana||0.6||0.4||FAC||FAC, OBL|
|Calamagrostis canadensis||0.6||1.8||FAC||FAC, OBL|
|1 Plant with known morphological adaptation for occurrence in wetlands (USACE, 1987)|
|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