085-MATR-0105
» Citation URL: http://vegbank.org/cite/urn:lsid:cvs.bio.unc.edu:observation:14812-{539EE8FF-8124-4651-A595-F7F2317A4A72} » Citing info
Plot ID Fields:
Author Plot Code	085-MATR-0105
Author Observation Code	085-MATR-0105
Location Fields:	MAP: Google | Yahoo | TopoZone | MapQuest
Location Accuracy	25 m
Confidentiality Status	100 km radius (nearest degree)
Latitude	38 º
Longitude	-77 º
State or Province	Virginia
Named Places	county: King William region|state|province: Virginia
Layout Fields:
DSG Polygon	10 x 10 m
Area	100 m²
Permanence	not permanent
Environment Fields:
Elevation	1 m
Slope Aspect	(n/a, flat) º
Topographic Position	plain/level/bottom
Landform	tidal flat
Hydrologic Regime	tidal - regularly flooded
Soil Moisture Regime	hygric
Soil Drainage	very poorly drained
Water Salinity	freshwater
Methods Fields:
Observation Start Date	31-Aug-1999
Observation End Date	31-Aug-1999
Project	Virginia Heritage
Cover Method	Carolina Vegetation Survey
Stratum Method	No Strata
Method Narrative	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:
Field Cover	90 %
Misc Fields:
Observation Narrative	This plot captures a lower statured, mixed stand of Zizania aquatica, Bidens laevis and Murdannia keisak in a marsh otherwise strongly dominated by Zizania. There are no obvious fluvial or geomorphologic features to explain the large Bidens component. The density of Bidens appears unusually low on both the Mattaponi and Pamunkey Rivers in 1999, as a result of river discharge rates at or near historic lows. Consequently the halinity gradient has migrated upstream, and sites that normally experience freshwater conditions have become oligohaline. Water constitutes 100% of surface substrate cover at mid-tide.

Taxa occurring on this plot-observation
Change plant label: --Choose a value-- Author's plant name Original Interpretation, full Scientific Name Original Interpretation, Scientific Name without authors Original Interpretation, USDA Code Original Interpretation, Common Name Current Interpretation, full Scientific Name Current Interpretation, Scientific Name without authors Current Interpretation, USDA Code Current Interpretation, Common Name
Change Strata Shown: --choose one-- show strata (no strata on this plot) show overall cover show strata + overall
ord Author Plant Name Original Interpretation, full Scientific Name Original Interpretation, Scientific Name without authors Original Interpretation, Common Name Original Interpretation, USDA Code Current Interpretation, full Scientific Name Current Interpretation, Scientific Name without authors Current Interpretation, Common Name Current Interpretation, USDA Code Stratum Cover Original Cover Code Basal Area Biomass Inference Area Stems: Stem Diameters (graphically): 1 Zizania aquatica var. aquatica Zizania aquatica var. aquatica **   Zizania aquatica var. aquatica **   Zizania aquatica var. aquatica **   Zizania aquatica var. aquatica **   Zizania aquatica var. aquatica **   Zizania aquatica var. aquatica **   Zizania aquatica var. aquatica **   Zizania aquatica var. aquatica **   -all-   37.5 % 7       -none- 2 Bidens laevis Bidens laevis **   Bidens laevis **   Bidens laevis **   Bidens laevis **   Bidens laevis **   Bidens laevis **   Bidens laevis **   Bidens laevis **   -all-   17.5 % 6       -none- 3 Murdannia keisak Murdannia keisak **   Murdannia keisak **   Murdannia keisak **   Murdannia keisak **   Murdannia keisak **   Murdannia keisak **   Murdannia keisak **   Murdannia keisak **   -all-   17.5 % 6       -none- 4 Persicaria punctata Persicaria punctata **   Persicaria punctata **   Persicaria punctata **   Persicaria punctata **   Persicaria punctata **   Persicaria punctata **   Persicaria punctata **   Persicaria punctata **   -all-   7.5 % 5       -none- 5 Peltandra virginica Peltandra virginica **   Peltandra virginica **   Peltandra virginica **   Peltandra virginica **   Peltandra virginica **   Peltandra virginica **   Peltandra virginica **   Peltandra virginica **   -all-   3.5 % 4       -none- 6 Persicaria arifolia Persicaria arifolia **   Persicaria arifolia **   Persicaria arifolia **   Persicaria arifolia **   Persicaria arifolia **   Persicaria arifolia **   Persicaria arifolia **   Persicaria arifolia **   -all-   1.5 % 3       -none- 7 Impatiens capensis Impatiens capensis **   Impatiens capensis **   Impatiens capensis **   Impatiens capensis **   Impatiens capensis **   Impatiens capensis **   Impatiens capensis **   Impatiens capensis **   -all-   1.5 % 3       -none- 8 Pontederia cordata var. cordata Pontederia cordata var. cordata **   Pontederia cordata var. cordata **   Pontederia cordata var. cordata **   Pontederia cordata var. cordata **   Pontederia cordata var. cordata **   Pontederia cordata var. cordata **   Pontederia cordata var. cordata **   Pontederia cordata var. cordata **   -all-   1.5 % 3       -none- 9 Amaranthus cannabinus Amaranthus cannabinus **   Amaranthus cannabinus **   Amaranthus cannabinus **   Amaranthus cannabinus **   Amaranthus cannabinus **   Amaranthus cannabinus **   Amaranthus cannabinus **   Amaranthus cannabinus **   -all-   1.5 % 3       -none- 10 Acorus calamus Acorus calamus **   Acorus calamus **   Acorus calamus **   Acorus calamus **   Acorus calamus **   Acorus calamus **   Acorus calamus **   Acorus calamus **   -all-   0.505 % 2       -none- 11 Bidens trichosperma Bidens trichosperma **   Bidens trichosperma **   Bidens trichosperma **   Bidens trichosperma **   Bidens trichosperma **   Bidens trichosperma **   Bidens trichosperma **   Bidens trichosperma **   -all-   0.505 % 2       -none- 12 Iris virginica Iris virginica **   Iris virginica **   Iris virginica **   Iris virginica **   Iris virginica **   Iris virginica **   Iris virginica **   Iris virginica **   -all-   0.505 % 2       -none- 13 Persicaria sagittata Persicaria sagittata **   Persicaria sagittata **   Persicaria sagittata **   Persicaria sagittata **   Persicaria sagittata **   Persicaria sagittata **   Persicaria sagittata **   Persicaria sagittata **   -all-   0.505 % 2       -none-
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Stratum Definitions:
Sorry, no Stratum Definitions found.
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