This is a GIS data layer of polygons representing Submerged Aquatic Vegetation of Barnegat Bay, 1968, originally mapped by the Army Corps of Engineers and State of New Jersey and digitized by the Grant F. Walton Center for Remote Sensing and Spatial Analysis (CRSSA), Rutgers University. Included are the submerged aquatic vegetation types mapped throughout the study area and their respective area and perimeter for each polygon. Please note: unlike other submerged aquatic vegetation data layers in this temporal series, submerged aquatic vegetation was not mapped in Little Egg Harbor for this particular year.
The sav68.shp was created as part of the 'Landscape Scale Approaches to Coastal Habitat Conservation - Barnegat Bay' study. This study focuses on the loss of submerged aquatic vegetation (SAV) that is occuring in Barnegat Bay as a result of human modification and decreasing water quality in the bay and watershed across time. CRSSA has compiled SAV studies conducted in the 1960's, 1970's, 1980's, 1990's to facilitate habitat loss assessment in Barnegat Bay. As of this writing, CRSSA continues to map and monitor submerged aquatic vegetation as part of its on-going Coastal Studies Program.
It should be noted that at the time of the original Army Corps of Engineers and State of New Jersey publication (1976), the purpose of their report was to investigate problems associated with "excessive aquatic plant growth" and to determine methods to resolve the perceived problem. Areas of overly abundant sea lettuce, eelgrass, and wigeongrass growth were deemed "infested" and in most cases these species were considered weeds. These aquatic plants were described as "nuisances to navigation, recreation, and public health".
Lathrop, R.G., R. Styles (RUMCS), S. Seitzinger (RUMCS) and J. Bognar. 2001. Use of GIS Mapping and Modeling Approaches to Examine the Spatial Distribution of Seagrasses in Barnegat Bay, New Jersey. Estuaries 24:904-916.
Lathrop, R.G. and J.A. Bognar. 2001. Habitat Loss and Alteration in the Barnegat Bay Region. Journal of Coastal Research Special Issue 32:212-228.
NOTE: Unlike other submerged aquatic vegetation data layers in this temporal series, submerged aquatic vegetation was not mapped in Little Egg Harbor for this particular year.