Plot Name: Reference Stand 19 (on Cone Cr., behind McKenzie School)

Plot Size: 0.25 ha

Established: 1973

Remeasurements: Abandoned 1979 due to excessive disturbance

Site Description

Latitude:

Longitude:

Elevation: 1,310 ft.

Aspect: E to SE

Slope: 45 to 60%

Landform: Small landslide on pediment surface bisected by an east-flowing stream

Soil parent material: Alluvium-colluvium from red breccia and andesite

Soil: Ultic Hapludalfs, McKenzie River Series

Plant Association: Tsuga heterophylla/Polystichum munitum- Oxalis oregana

Age class: Mature

Soils:

The soil at one profile pit was described and sampled (see profile no. 95 in the HJA Soils Data Base). The soil is deep and well drained with a dark brown gravelly silt loam surface and reddish brown silty clay loam subsoil. Content of gravels and cobbles averages 35% in the surface and about 15% in the B horizon. Depth to the C horizon is about 50 to 60 in. Bulk density of the A horizon was 0.9 g/cc and for the B horizon 1.1 g/cc. Soil organic matter content was 7.8% for the surface and 0.7% in the subsoil.

General Stand Description:

This is a non-uniform tree stand made up largely of middle-sized Pseudotsuga menziesii. Small amounts of Tsuga heterophylla are emergent. Acer macrophyllum is also common in the tree layer. Tsuga heterophylla dominates reproducing conifers of the understory.

The understory has a large amount of species deversity and is rather shrubby. However, it meets the criteria for classificatin as a TSHE/POMU-OXOR community because the dominance of the herb layer by Polystichum munitum and Oxalis oregana precludes other classification of the stand.

The shrub layer is dominated by tall Acer circinatum, low Gaultheria shallon, and Berberis nervosa.

The herb layer is dominated by wide patches of Oxalis oregana and scattered clumps of Polystichum munitum.  Linnaea borealis, Coptis laciniata, and Tiarella unifoliata are also common. Mosses are well devloped with Eurhynchium oreganum dominating with more than 40% cover.

Stand Structure and Composition

No data available