|Tufted bulrush – Alpine bulrush|
– Trichophorum alpinum
|n = 6|
|III.A.3.k. Subalpine Lowland Sedge-Moss Bog Meadow|
|Ecosystem: Relict Lakebed; Headwater Fen|
Tufted bulrush (Trichophorum caespitosum) communities are well documented in Alaska (Shephard, 1995; DeVelice et.al., 1999; Dachnowski-Stokes, 1941; Streveler, et. al., 1973; Fox, 1983 and Jaques, 1973, in Viereck, et. al., 1992), but no authors have reported the presence of alpine bulrush (Trichophorum alpinum), and on a few Kenai lowland fens this plant is dominant or co-dominant.
Tufted bulrush – alpine bulrush communities are found primarily on smaller Relict Lakebed surfaces and Headwater Fens at higher elevation south of Clam Gulch.
Tufted bulrush dominates, at nearly 50% cover, with woodland densities of alpine bulrush. Dwarf birch (Betula nana) is present, often with bog rosemary (Andromeda polifolia) and hooded ladies’ tresses (Spiranthes romanzoffiana) in trace amounts.
This is the community in which a substantial range extension for elephant-head lousewort (Pedicularis groenlandica), an Alaska Natural Heritage Program S1S2 rare plant, was discovered in the headwaters of the Anchor River.
horizon is over one meter (40”) thick, and the water table is at or very close
to the surface. All six 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.
|Wetland Indicator Status|
|Betula nana||1.0||7.5||FAC||FAC, OBL|
|Vaccinium uliginosum||0.7||1.9||FAC||FACU+, FACW
|Spiranthes romanzoffiana||0.8||0.4||OBL||FACW, OBL
|Parnassia palustris||0.7||0.5||FACW||FACW, OBL|
|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 10:05