STAND DESCRIPTION
- Plot Name: Reference Stand 34 (HJA, Mack Creek Riparian)
- Plot Size: 2.0 ha
- Established: 1979
- Remeasurements: 1984, 1989, 1995
- Site Description
- Latitude: 44.25
- Longitude: 122.17
- Elevation: 820 m
- Aspect: SW and NE
- Slope: 5-65%
- Landform: Incised drainage (Mack Creek) and steep, smooth
side-slopes, small stream terraces.
- Soil Parent Material: Unknown
- Soil(s): Unknown
- Plant Association: Tsuga heterophylla/Acer circinatum/
Polystichum munitum
- Age class: Old-growth
Soils:
- No information currently available.
General Stand Description:
The tree stand is made up of scattered large, old-
growth Pseudotsuga menziesii with abundant, largely younger
stems of Tsuga heterophylla and Thuja plicata. Taxus
brevifolia is also common. Tree species having only limited
occurrence include Abies amabilis, Acer macrophyllum, and
Cornus nuttallii.
The riparian vegetation within an area 40 m by 100 m
along the main stem of Mack Creek has been sampled
periodically starting in 1982. Unfortunately these data have
not been summarized so no iformation is currently available.
As is the case with most other reference stands, stem
maps have been made and are available.
- Stand Structure and Composition
- Live Tree Data at Last Measurement
- Basal area: 83.2 m2/ha
- PSME-27.1 m2/ha
- THPL-29.8 m2/ha
- TSHE-25.5 m2/ha
- Stem numbers: 368/ha
- TSHE-198/ha
- THPL-87/ha
- PSME-14/ha
- Diameter distribution:
- median-13.7 cm
- quadratic mean-53.7 cm
- maximum-210.6 cm
- Age: not available
- Height (measurements within the last 20 years): not
available
- Volume: 1560.0 m3/ha
- PSME-546.9 m3/ha
- TSHE-515.3 m3/ha
- THPL-491.3 m3/ha
- Biomass: 720.6 Mg/ha
- PSME-316.0 Mg/ha
- TSHE-238.5 Mg/ha
- THPL-162.4 Mg/ha
- Coarse Woody Debris: not available
- Ecosystem and Polulation Dynamics (measurements for most recent
interval, 1989-1995)
- Net Bole Production: 3.7 Mg/ha/yr
- Annual Mortality: 5.4 Mg/ha/yr
- Percent of Trees Dying: total-0.4%/yr