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
Plot Quality Fields:
Plot Validation Level
(2) classification plot: sufficient for inclusion in a classification revision
Overall Plot Vegetation Fields:
--no data--
Misc Fields:
Observation Narrative
Plot location: Marsh on west side of Major Branch of the Northwest River, 0.8 miles NW of Rt. 168 Bridge. Plot center marked by a 1" white PVC pipe.
Average water depth= 3cm.
Some hummock and flooded flat microtopography.
NOTE: Water level of River ca. 25cm below high water mark on trees on both dates of visit.
Refractometer measurement: 1.5- 2.0 ppt in main river channel 10/16/95.
One of several pocket marshes along the major branch of the Northwest River just west of Rt. 168, representing the extreme upstream limit of marsh vegetation along this river. Invasion of shrubs (especially Myrica cerifera, Rosa palustris, Salix carolinana, and sapling Acer rubrum) appears to be increasing in these marshes. The vegetation of this plot is quite typical of low- to medium-statured marshes in which Eleocharis spp. And Scirpus americanus are prevalent.