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
34
m
Shrub Height
5
m
Field Height
2
m
Tree Cover
40
%
Shrub Cover
40
%
Field Cover
60
%
Nonvascular Cover
80
%
Misc Fields:
Observation Narrative
The plot was positioned in a very openly wooded boulderfield on the lower slope bordering the Potomac River floodplain. The substrate of this site has with 80% cover of relatively small, deeply piled, loose boulders. The high rock cover limits floristic diversity, and may also prohibit tree establishment and facilitate frequent windthrows. On the date of sampling (June 9), Impatiens pallida seedlings covered ca. 25% of the plot; by early September, these had attained heights up to 1.2 meters and collectively covered ca. 65% of the area.
