|Barclay willow / Bluejoint|
|Salix barclayi / Calamagrostis canadensis|
|n = 26|
|II.C.(2)g. Open Low Willow Scrub|
DeVelice et. al. (1999) document Barclay willow / Bluejoint (SALBAR/CALCAN) on Chugach National Forest. The Natural Resource Conservation Service describes a “willow - grass” “ecosite” that is also identical. Similar Barclay's willow (Salix barclayi) types are noted for the rest of Alaska, but these lack abundant bluejoint (Calamagrostis canadensis) cover, and are usually found on different landscapes (Viereck, et. al., 1992).
This widespread, common type occupies nearly all stream margins on the lowlands, particularly south of Clam Gulch.
Along Starisky Creek, Barclay willow is exceptionally tall, generally over 2 m, elsewhere a low to medium height, open Barclay willow stand is mixed with dense bluejoint cover. Few other plants are common, although Jacob’s ladder (Polemonium acutiflorum) and arctic blackberry (Rubus arcticus) are present, and field horsetail (Equisetum arvense) and fireweed (Chamerion angustifolium) are usually present in low abundance.
The organic horizon is typically thin, and a histic epipedon (20 cm thick organic horizon) is lacking. The water table can be shallow, or deep, but flooding can be common. The pH was moderately acid at the four sites where it was measured (average = 5.7). This type usually indicates a jurisdictional wetland is present, and 19 of the 26 sites visited meet hydric soils criteria.
Table 1. Frequency of soil series occurrence and hydric status at NRCS holes. Bold type indicates soils on the NRCS Alaska hydric soils list.
|SERIES||n||Hydric Criteria Number|
|1Proposed series, definitely hydric|
Table 2. Summary of plant frequency and average cover for plants occurring in more than 50% of plots.
|Wetland Indicator Status|
|Salix1 barclayi||1.0||54.3||FAC||FAC, FACW
|Calamagrostis canadensis||1.0||68.3||FAC||FAC, OBL
|Equisetum arvense||0.7||12.3||FAC*||FAC*, FACW-|
|Chamerion angustifolium||0.7||5.5||FACU||FACU, FAC
|Thalictrum sparsiflorum||0.6||1.1||FACU||FACU, FAC+
|Trientalis europaea||0.6||0.5||FAC||FAC*, FAC|
|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
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04 May 2007 10:00