Student: Michael Stocker†
Mentor: John Rapaglia
Major: Environmental Systems Analysis and Management
Time: 2:40 - 3:00
Land use has a direct impact on heavy metal loading to coastal sediments through runoff, which in turn has environmental and human health consequences. This study sought to compare metals in the sediments of two hydrologically similar lagoons with drastically different watershed characteristics (The Great South Bay, NY, USA; Lesina Lagoon, Apulia, Italy). Cadmium, copper, iron, nickel, lead and zinc concentrations in sediment samples were measured through ICP-AES analysis. The areas of dominant land uses were calculated through the manual reclassification of satellite imagery in ArcGIS. It was determined that the Great South Bay had a greater percentage of its watershed classified as urban development, where the Lesina watershed was primarily agricultural. The sediments of the Great South Bay had significantly higher concentrations of residual Cd, Cu, Fe, Pb and Zn. Lesina had a higher concentration of bioavailable Ni, yet it was still not above established toxicity thresholds.
† Graduate Student