|n = 1|
|III.A.3.i. Halophytic Sedge Wet Meadow|
The Ramensk’s sedge (Carex rameskii) type is well known for coastal Alaska.
Ramensk’s sedge (Carex rameskii) forms a nearly monotypic (single species) dense stand in the protected tidal zone just below a Lyngbye’s sedge (Carex lyngbyei) zone. This is the first tidally influenced zone where the ground is nearly completely covered with vegetation. Below Ramensk’s sedge lies an open mudflat zone of alkaligrass (Puccinellia spp.), typically Hulten’s and Nootka alkaligrass (P. hultenii and nutkaensis).
In the one plot measured, tall spikegrass (Poa eminens), pacific silverweed (Argentina egedii) and Nootka alkaligrass were present.
The water table is at or near the surface depending on the tidal stage, which affects this type more often than the Lyngbye’s sedge type, topographically above it. On the Susitna Flats, Ramensk's sedge occurs most frequently in Vince and Snow's (1984) 'Outer sedge marsh Zone 3', which floods a minimum of 0-5 times per summer (average = 3).
At the one site we measured, near the mouth of the Kasilof River, the organic mat is 150 centimeters thick. Considerable organic material is incorporated when the tide brings in silt, burying the bases of the sedges (or in winter, the entire senesced plant). Subsidence and burial of supra-tidal vegetation following the 1964 earthquake might also explain the high organic content of the soil. Less organic material might be more typical (c.f. Vince and Snow, 1984). pH was moderately alkaline (8.3). This plot is a jurisdictional wetland.
Table 1. Summary of plant cover.
|Wetland Indicator Status|
|np- not present on the wetland indicator status
|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 09:39