STAND DESCRIPTION

Plot Name: Reference Stand 35 (Hagan Block Riparian)
Plot Size: 2.13 ha
Established: 1980
Remeasurements: 1985, 1990, 1996
Site Description:
Latitude: 44.17
Longitude: 122.43
Elevation: 460 m
Aspect: NW and SE
Slope: 5-55%
Landform: Limited alluvial terraces with facing toe-slopes
Soil Parent Material: Unknown
Soil(s): Unknown
Plant Association: Tsuga heterophylla/Acer circinatum/ Polystichum munitum
Age class: mature

Soils:

No description currently available.

General Stand Description:

Reference Stand 35 is designed to sample the riparian stand along the lower reaches of Hagan Creek. As such, the plot samples the thin band of hardwoods on the margins of the creek. Sampled hardwood species include big-leaf maple, western dogwood, red alder, and cascara.
The tree layer is dominated by mature Pseudotsuga menzeisii accompanied by increasing amounts of Tsuga heterophylla now entering the stand. Hardwoods, largely restricted to the stream margins, include substantial amounts of Rhamnus purshiana, Acer macrophyllum, Corus nuttallii, and Alnus rubra.
Stand Structure and Composition
Live Tree Data at Last Measurement
Coarse Woody Debris: not available
Ecosystem and Population Dynamics (measurements for most recent interval, 1990-1996)
Net Bole Production: 5.9 Mg/ha/yr
Annual Mortality: 1.2 Mg/ha/yr
Percent of Trees Dying: Total-1.3%/yr (13.7% were uprooted)