. Ecology of Buzzards Bay : an estuarine profile . Fig. Average PCB concentrations for lobsters and winter flounder collected at various stations around Buzzards Bay Note the high concentration at New Bedford Data from J Schwartz Massachusetts Di- vision of Marine Fisheries, and Buzzards Bay Project (1987) throughout the bay. The PCB's migrate from the highly contaminated bottom sediments into the over- lying water column primarily through desorption, sediment resuspension by boundary layer currents, and through sediment reworking by benthic organ- isms. PCB contamination will be a hazard
. Ecology of Buzzards Bay : an estuarine profile . Fig. Average PCB concentrations for lobsters and winter flounder collected at various stations around Buzzards Bay Note the high concentration at New Bedford Data from J Schwartz Massachusetts Di- vision of Marine Fisheries, and Buzzards Bay Project (1987) throughout the bay. The PCB's migrate from the highly contaminated bottom sediments into the over- lying water column primarily through desorption, sediment resuspension by boundary layer currents, and through sediment reworking by benthic organ- isms. PCB contamination will be a hazard to the ecological health of New Bedford and Buzzards Bay for a long time. Trace Metals. New Bedford Harbor is also the primary location for trace metal contamination within Buzzards Bay. Metals, including cadmium, chromium, lead, mercury, copper, silver, nickel, and arsenic, can enter bay waters through industrial waste discharge, boat paint, sewage effluent, and dredged material, as well as through atmospheric deposition and natural rock weathering. Industrial activities and the wastewater treatment facility in New Bedford, however, are dominant sources of these contaminants. Although industrial use of cop- per for metal plating, historically a large industry in the New Bedford area, is no longer prevalent, the use of copper-containing antifouling paints and cop- per pipes for water lines continues to input low lev- els of copper to the bay. Elevated concentrations of metals have been found in mussels, mummichogs, and winter flounder in New Bedford Harbor, as well as in ring-billed gulls and mice, indicating biomagnification of metals may be occurring through the food chain (IEP, Inc. 1988). Elevated levels of metals are found in the adjacent saltwater wetlands and in the detritivores and their predators living and feeding in these wetlands. As with PCB's, tissue concentrations are generally highest in areas near- est the areas of direct contamination (New Bedford Inner Harbo
Size: 2288px × 2184px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
