SAV Home > 2009 SAV Report > Species and Ground Surveyors Key


Zm Zostera marina (eelgrass)
Rm Ruppia maritima (widgeon grass)
C Chara sp. (muskgrass)
Cd Ceratophyllum demersum (coontail)
Cl Callitriche sp. (water-starwort)
Ec Elodea canadensis (common elodea)
Ed Egeria densa (water-weed)
Hd Heteranthera dubia (water stargrass)
Hv Hydrilla verticillata (hydrilla)
Ms Myriophyllum spicatum (Eurasian watermilfoil)
N Najas sp. (naiad)
Nfl Najas flexilis (northern naiad)
Ngr Najas gracillima (slender naiad)
Ngu Najas guadalupensis (southern naiad)
Nm Najas minor
Nt Nitella sp. (muskgrass)
Pcr Potamogeton crispus (curly pondweed)
Pe Potamogeton epihydrus (leafy pondweed)
Pn Potamogeton nodosus (American pondweed)
Ppc Stuckenia pectinata (sago pondweed)(Potamogeton pectinatus)
Ppf Potamogeton perfoliatus (redhead-grass)
Ppu Potamogeton pusillus (slender pondweed)
S Sparganium sp. (bureed)
Tn Trapa natans (water chestnut)
Va Vallisneria americana (wild celery)
Zp Zannichellia palustris (horned pondweed)
U Unknown species composition


Baltimore County Department of Environmental Protection and Resource Management
Chesapeake College
District of Columbia Fisheries and Wildlife Division
Maryland Coastal Bays Program
Maryland Department of Natural Resources
Maryland Environmental Service
Multiple Surveyors
National Oceanic and Atmospheric Administration
National Park Service
United States Fish and Wildlife Service
University of Maryland Center for Environmental Science
University of Virginia
Virginia Institute of Marine Science

2009 SAV Density Class Key

 0 - 10%
 10- 40%
 40 - 70%
 70 - 100%


2009 Comparison Map Key

  2009 SAV
  2008 SAV
  SAV both years
  Regions that were not fully mapped in 2008

Each bed is identified with an unique two letter (A,B,C,...,AA,BA,CA,...) and one number (1-4) designation. The numbers represent the density classification discussed in the text, i.e., 1 = <10%; 2= 10-40%; 3= 40-70%; 4= 70-100%.