 Lead in Micrograms/square centimeters of Sediment |
| Data was adapted from S. Bricker Urso and S.W. Nixon, The Impact of Human Activities on the Prudence Island Estuarine Sanctuary as Shown by Historical Changes in Heavy Metal Inputs and Vegetation, URI Graduate School of Oceanography, final report to the Narragansett Bay Estuarine Sanctuary Scientific Committee, 1984. |