Barclay's willow / Rich
|Salix barclayi / Rich
|n = 43|
|II.C.1.b. Low Willow|
|Ecosystem: Discharge Slope|
This type has been described for Chugach National Forest (DeVelice et. al., 1999), Copper River Basin (Boggs, 2000) and Yakutat Forelands (Shephard, 1995), but is absent from The Alaska Vegetation Classification (Viereck, et. al., 1992).
Found primarily on the discontinuous dense till covering plateaus above 500 meters elevation, or on foot and toeslopes of terraced moraines higher than 350 meters (1200í), Barclay's willow (Salix barclayi) / rich is common south of Clam Gulch. On these slopes, groundwater discharge or dense till often supports a water table near the surface.
Barclay's willow / rich communities are characterized by a dense low thicket of Barclay's willow topping a diverse assemblage of graminoids and forbs. Bluejoint (Calamagrostis canadensis) and Canadian burnet (Sanguisorba canadensis) are present, and field horsetail (Equisetum arvense), valerian (Valeriana capitata), arctic blackberry (Rubus arcticus), fireweed (Chamerion angustifolium), Jacobís ladder (Polemonium acutiflorum) and felwort (Swertia perennis) are often present.
About a third
of the sites visited had at least a histic epipedon, while another third had
shallow water tables, while nearly a third are probably not wetlands.
pH at the three sites measured ranged from extremely (4.4) to strongly
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||81.5||FAC||FAC, FACW|
|Calamagrostis canadensis||1.0||7.8||FAC||FAC, OBL|
|Equisetum arvense||0.8||40.6||FAC*||FAC*, FACW-|
|Chamerion angustifolium||0.8||3.6||FACU||FACU, FAC
|Swertia perennis||0.7||2.7||FACW||FAC+, FACW+|
|Trientalis europaea||0.6||0.6||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
Anchorage, Alaska 99501
04 May 2007 10:01