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
31.5
m
Shrub Height
6
m
Field Height
4
m
Tree Cover
85
%
Shrub Cover
20
%
Field Cover
10
%
Nonvascular Cover
2
%
Misc Fields:
Observation Narrative
The forest on the upper south slope of Stuarts Knob was heavily disturbed (partly de-nuded) during mining operations that ceased in the 1920's. The site is very rocky, with much old decaying wood debris an many tip-up mounds in the area. The trees in this plot may have regenerated at some point during the mining period, and now form a fairly mature stand of oaks and tulip-poplar with a strong redbud understory. Composition reflects the chemistry of soils weathered from coarse-grained amphibolite or a similar mafic rock. However, the herb layer has been heavily reduced in both cover and diversity by long-term excessive deer browse (due to prohibition of hunting on state park land). On other parts of the mountain, the herb layer has developed nearly monospecific cover of graminoids, especially Brachyelytrum erectum, that are unpalatable to deer; see also plot FSSP003.
0-4 cm: deciduous leaf litter
4-6 cm: matted leaves, OM
6-13 cm: medium brown clay loam with gravel
13-37+ cm: orange-red clay with bright red concretions
Disturbance Data:
Disturbance Type
Disturbance Intensity
Disturbance Comment
unknown
Historical logging and mining on this monadnock, pre-1920's; areas of exposed subsoil/erosion; several dead redbuds. Heavy deer herbivory.