|Barclay's willow / Bluejoint / Marsh fivefinger|
|Salix barclayi / Calamagrostis canadensis / Comarum palustre|
|n = 32|
|II.C.2.i. Willow - Graminoid Shrub Bog|
|Ecosystem: Riparian, Relict Lakebed|
Working around the mouth of the Kenai and Kasilof Rivers, Rosenberg (1986) documents Barclay's willow / Bluejoint / Marsh fivefinger on the lowlands. It probably occurs elsewhere in Alaska, but has been lumped with other types such as the Barclay's willow (Salix barclayi) / bluejoint (Calamagrostis canadensis) (Ritchie, et.el., 1981; DeVelice, et. al., 1999; Boggs, 2000) type, and the Barclay's willow – mixed herb type (DeVelice et. al., 1999; Boggs, 2000; Shephard, 1995).
Nearly all of the sites visited occur along stream channels, in low spots such as abandoned oxbows and lagg-like features near valley walls. A few sites are in low spots on relict glacial lakebeds.
This widespread Kenai lowland association is characterized by an open Barclay's willow stand amongst tall bluejoint tussocks and microtopographic-low spots filled with pools of standing water fringed with marsh fivefinger (Comarum palustre). Jacob’s ladder (Polemonium acutiflorum), arctic blackberry (Rubus arcticus), water horsetail (Equisetum fluviatile), and dwarf birch (Betula nana) are often present.
More than half
the sites visited have sufficiently thick organic horizons to be classified as histosols,
while most of the remainder of the sites have histic epipedons. The water table is frequently at or very near the surface.
The pH at the one site where it was measured was neutral (6.9).
All the 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.
|STARICHKOF||7||1, 2B2, 3|
|1Proposed series, definitely hydric|
2. Summary of plant frequency and average cover for plants occurring
in more than 50% of plots .
|Wetland Indicator Status|
|Salix1 barclayi||1.0||32.9||FAC||FAC, FACW|
|Betula nana||0.7||6.8||FAC||FAC, OBL|
|Calamagrostis canadensis||0.9||34.5||FAC||FAC, OBL|
|Equisetum arvense||0.6||18.6||FAC*||FAC*, FACW-
|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 10:00