Releve Virginia Division of Natural Heritage, see http://www.dcr.virginia.gov/natural_heritage/documents/nh_plotform_instructions.pdf
Overall Taxon Cover Values are Automatically Calculated?
no
Stem Observation Area
400
m²
Plot Quality Fields:
Plot Validation Level
(2) classification plot: sufficient for inclusion in a classification revision
Overall Plot Vegetation Fields:
Tree Height
7
m
Shrub Height
5
m
Field Height
5
m
Tree Cover
50
%
Shrub Cover
70
%
Field Cover
25
%
Nonvascular Cover
30
%
Misc Fields:
Observation Narrative
Plot location: cliff top 1.86 km SSW of Hopewell Gap, on crest of High Point Mtn. Not permanently marked. Rock types present: quartzite (massive outcrops).
Cliff crest habitat characterized by stunted open pine-oak/heath vegetation and lithophytic lichens, particularly Lasallia pensylvanica. The cliffs here are formed by massive, very resistant, eastward-dipping strata of Weaverton quartzite. Pinus pungens, the dominant pine here, is rare and local east of the mountains in the Piedmont. Increment cores indicate that some of these pines, scarcely 3 meters tall and growing in small rock crevices, are more than 100 years old. Quercus montana, although present, fails to reach tree size in this very drought-prone, infertile, exposed environment. Although the scrubby vegetation has probably been influenced by past fires (of which there are numerous signs in the vicinity), its persistence is primarily the result of edaphic conditions. This community type is essentially a montane outlier occurring here on one of the higher piedmont ridges. Bouldery cliff face below the crest and outside the plot supports Pinus spp., Quercus montana, Populus grandidentata, Paulownia tomentosa, Rhus typhina, and all typical ericaceous shrubs.
Soil Nutrient Status: low.
Where developed, extremely shallow sand/loamy sand/ with numerous rock fragments.
Local shallow pockets and thin veneers of yellowish loamy sand.
Disturbance Data:
Disturbance Type
Disturbance Intensity
Disturbance Comment
unknown
A few dead trees in and near plot. Drought stress?