|Wild calla – Water horsetail|
|Calla palustris – Equisetum fluviatile|
|n = 1|
|III.B.3.a. Fresh Herb Marsh|
Wild calla - water horsetail has not been described for Alaska. Water horsetail (Equisetum fluviatile) communities are common (Ritchie, et. al., 1981; Racine, 1978b; Young and Racine, 1976), but this type is a nearly pure stand of wild calla (Calla palustris), with low water horsetail abundance.
Wild calla – water horsetail was found at one unusual location northeast of Nikiski along the shore of Suneva lake. Suneva Lake was created when a road dammed its outlet stream flooding a peatland. This community has colonized a flooded area between the lakeshore and a small island. It seems to be persistent there.
Dense wild calla is growing through a saturated moss mat. Robust silvery sedge (Carex canescens, a frequent disturbance indicator on the lowlands), bluejoint (Calamagrostis canadensis), Sitka sedge (Carex sitchensis), western water hemlock (Cicuta douglasii), and marsh fivefinger (Comarum palustre) are present in low abundance, along with a little Sphagnum spp. moss. A few paper birch (Betula papyrifera) and balsam poplar (Populus balsamifera) snags are present.
The saturated 83 cm thick organic mat lies over a dense silty-gravelly substrate. We measured the pH as strongly acid (5.3). This site is a jurisdictional wetland.
Table 1. Summary of plant cover.
|Wetland Indicator Status|
|Calamagrostis canadensis||0.5||FAC||FAC, 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 09:39