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Submerged aquatic vegetation (SAV) CRSSA image classification of the Barnegat Bay - Little Egg Harbor estuary, New Jersey: 2009

Dates

Publication Date
Time Period
2011-05-11

Summary

This is a GIS data layer representing submerged aquatic vegetation (SAV) of the Barnegat Bay - Little Egg Harbor estuary, 2009, developed by classifying high resolution airborne digital camera imagery. Included are the submerged aquatic vegetation densities mapped into three classes throughout the study area and their respective area and perimeter for each polygon. The three classes of SAV are: 1) Dense (80% - 100% cover), 2) Moderate (40% - 80% cover), and 3) Sparse (10% - 40% cover). For full documentation, please refer to the technical report, 'Assessment of Seagrass Status in the Barnegat Bay - Little Egg Harbor Estuary System: 2003 and 2009 (Rutgers University, Lathrop and Haag, 2010), which is listed in the cross reference section [...]

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Shapefile: Submerged_Aquatic_Vegetation_WGS84.zip
Submerged_Aquatic_Vegetation_WGS84.shp 16.48 MB
Submerged_Aquatic_Vegetation_WGS84.dbf 161.44 KB
Submerged_Aquatic_Vegetation_WGS84.shx 15.1 KB
Submerged_Aquatic_Vegetation_WGS84.prj 145 Bytes
Submerged_Aquatic_Vegetation_WGS84.shp.xml
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42.16 KB
Submerged_Aquatic_Vegetation_WGS84.sbn 17.74 KB
Submerged_Aquatic_Vegetation_WGS84.sbx 764 Bytes

Purpose

The purpose of this study was to map the areal extent and density of submerged aquatic vegetation within the Barnegat Bay and Little Egg Harbor, New Jersey as part of ongoing monitoring for the Barnegat Bay Partnership. Our goal was to develop a methodology that was comparatively objective in delineating bed boundaries and characterizing seagrass density, was cost-effective and easily repeatable for future monitoring purposes. We applied this conceptual framework to the mapping and spatial analysis of seagrass beds and the broader benthic environment in Barnegat Bay-Little Egg Harbor estuary in New Jersey, USA. SAV is a key indicator of the health of the Barnegat Bay estuary, and is under constant stress from a number of sources. These stresses cause changes in seagrass bed characteristics which in turn make frequent monitoring of this habitat type necessary.

Additional Information

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