|n = 2|
|III.A.3.i. Halophytic Sedge Wet Meadow|
Lyngbye sedge (Carex lyngbyei) is a well known and described type for Alaska. It is listed in every Alaska classification that includes coastal ecosystems.
A monotypic stand of tall Lyngbye’s sedge dominates the upper tidally-influenced zone, where the shore is protected from surf. On the lowlands these sites are limited to protected areas such as the lagoon north of Nikiski, near the mouths of the larger streams, the Kenai and Kasilof River; and behind the Homer Spit.
A Ramensk’s sedge (Carex ramenski) zone lies just seaward. Landward, pools with common mare’s tail (Hippuris vulgaris) and the rare plant (G4, S2S3, Natural Heritage Progam) Kamchatka spikerush (Eleocharis kamtschatica) lie below a zone of pacific silverweed (Argentina egedii) and goosetongue (Plantago maritima).
On the Susitna Flats, Lyngbye's sedge principally occurs in Vince and Snow's (1984) 'Inner sedge marsh Zone 7', which floods a minimum of 0-4 times per summer (average = 2). Organic material usually does not accumulate, although occasional inland stands are found with thick organic horizons. On the coast, due to flooding frequency, these sites are always jurisdictional wetlands.
Some inland sites have high Lyngbye’s sedge cover, usually mixed with other plants. Lyngbye’s sedge does not necessarily require saltwater influence, but it is a good indicator of jurisdictional wetland conditions.
Table 1. Summary of plant frequency and average cover for plants occurring in more than 50% of plots.
|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 09:38