Environmental assessment of metal exposure to corals living in Castle Harbour, Bermuda
Prouty, Nancy G.
Goodkin, Nathalie F.
Lamborg, Carl H.
Storlazzi, Curt D.
Hughen, Konrad A.
MetadataShow full item record
Environmental contamination in Castle Harbour, Bermuda, has been linked to the dissolution and leaching of contaminants from the adjacent marine landfill. This study expands the evidence for environmental impact of leachate from the landfill by quantitatively demonstrating elevated metal uptake over the last 30 years in corals growing in Castle Harbour. Coral Pb/Ca, Zn/Ca and Mn/Ca ratios and total Hg concentrations are elevated relative to an adjacent control site in John Smith's Bay. The temporal variability in the Castle Harbour coral records suggests that while the landfill has increased in size over the last 35 years, the dominant input of metals is through periodic leaching of contaminants from the municipal landfill and surrounding sediment. Elevated contaminants in the surrounding sediment suggest that resuspension is an important transport medium for transferring heavy metals to corals. Increased winds, particularly during the 1990s, were accompanied by higher coral metal composition at Castle Harbour. Coupled with wind-induced resuspension, interannual changes in sea level within the Harbour can lead to increased bioavailability of sediment-bound metals and subsequent coral metal assimilation. At John Smith's Bay, large scale convective mixing may be driving interannual metal variability in the coral record rather than impacts from land-based activities. Results from this study provide important insights into the coupling of natural variability and anthropogenic input of contaminants to the nearshore environment.
This paper is not subject to U.S. copyright. The definitive version was published in Marine Chemistry 154 (2013): 55–66, doi:10.1016/j.marchem.2013.05.002.
Suggested CitationArticle: Prouty, Nancy G., Goodkin, Nathalie F., Jones, R., Lamborg, Carl H., Storlazzi, Curt D., Hughen, Konrad A., "Environmental assessment of metal exposure to corals living in Castle Harbour, Bermuda", Marine Chemistry 154 (2013): 55–66, DOI:10.1016/j.marchem.2013.05.002, https://hdl.handle.net/1912/6164
Showing items related by title, author, creator and subject.
Record of Little Ice Age sea surface temperatures at Bermuda using a growth-dependent calibration of coral Sr/Ca Goodkin, Nathalie F.; Hughen, Konrad A.; Cohen, Anne L.; Smith, Struan R. (American Geophysical Union, 2005-11-30)Strontium to calcium ratios (Sr/Ca) are reported for a massive brain coral Diploria labyrinthiformis collected from the south shore of Bermuda and are strongly correlated with both sea surface temperature (SST) and mean ...
Ohnemus, Daniel C. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2014-02)Marine particles include living and non-living solid components of seawater, representing a dynamic and chemically diverse mixture of phases. Through a combination of method development, basin-scale particulate collection ...
Fitzgerald, William F. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1970-01)Anodic stripping voltammetry utilizing a thin film mercury composite graphite electrode has been evaluated and applied for the direct analysis of the metals, Zn, Cu, Pb, and Cd in sea water. The electrode was observed to ...