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 0.8 miles south of the confluence of the Northwest River and Indian Creek, near the headwaters of a tributary gut. Plot center marked with a 1" white PVC pipe.
Water= 3-5cm deep.
Nutrient Regime: Oligotrophic.
Refractometer measurement: (8/1/95)= 0 ppt; (10/16/95)= 3 ppt.
Plots C14-C17, all located within a 0.5 ha area, represent the variation within an outstanding marsh community characterized by Eleocharis fallax, Eleocharis rostellata, Pontaderia cordata, and Cladium mariscoides. Located in the interior of an extensive marsh complex well away from major guts and channels, the habitat presumably receives fewer nutrient inputs and less frequent flushing than the channel edge habitats supporting mixed tall marsh vegetation. In C14-17, the relatively short stature (avg. ca. 50cm tall) of the vegetation, low floristic diversity, and graminoid dominance presumably indicate oligotrophy. In this plot (C16), the rhizomatous and tip-rooting Eleocharis rostellata dominates in a nearly monospecific stand with few associated species. Similar, small stands are scattered throughout the marshes of the Northwest River.
