Macroalgae and DGT as indicators of available trace metals in marine coastal waters near a lead–zinc smelter
- 284 Downloads
The levels of Cd, Cu, Pb, and Zn were determined in the commonest species of green, red, and brown algae collected from five coastal sites in south-western Sardinia (Italy), an area with a long history of mining and smelting. The usefulness of employing Enteromorpha sp. and Padina pavonica (L.) Thivy to monitor metal pollution was evaluated, while diffusive gradients in thin films (DGT) devices were used to measure dissolved metals in seawater. Levels of Cd and Pb were high enough to be of environmental concern in the whole study area. A significant relationship was found between the content of Pb in P. pavonica and DGT-labile Pb in seawater, suggesting that gross elemental concentrations of nonessential metals such as Pb in algal tissues are apparently controlled by the abundance of dissolved metal species in the ambient seawater. The results pointed out the usefulness of using both DGT and algal methods for a better understanding of trace metal availability in coastal waters.
KeywordsBiomonitoring Marine macroalgae DGT Trace metals Smelters Mediterranean Sea
Unable to display preview. Download preview PDF.
- Brown, M. T., & Depledge, M. H. (1998). Determination of trace metal concentrations in marine organisms. In: W. J. Langston & M. J. Bebianno (Eds.), Metal metabolism in aquatic environments (pp. 185–217). London: Chapman & Hall.Google Scholar
- Bryan, G. W., Langston, W. J., Hummerstone, L. G., & Burt, G. R. (1985). A guide to the assessment of heavy metal contamination in estuaries using biological indicators. Occasional Publications. Marine Biological Association of the United Kingdom, 4, 1–92.Google Scholar
- Fergusson, J. E. (1990). Heavy elements, chemistry, environmental impact and health effects. Oxford UK: Pergamon.Google Scholar
- Phillips, D. J. H. (1994). Macrophytes as biomonitors of trace metals. In: K. I. M. Kramer (Ed.), Biomonitor of coastal waters and estuaries (pp. 85–103). Boca Raton: CRC.Google Scholar
- Sanchez-Rodriguez, I., Huerta-Diaz, M. A., Choumiline, E., Holguin-Quinones, O., & Zertuche-Gonzalez, J. A. (2001). Elemental concentrations in different species of seaweeds from Loreto Bay, Baja California Sur, Mexico: Implications for the geochemical control of metals in algal tissue. Environmental Pollution, 114, 145–160.CrossRefGoogle Scholar
- Sunda, W. G., & Guillard, R. R. L. (1976). The relationship between cupric ion activity and the toxicity of copper to phytoplankton. Journal of Marine Research, 34, 511–529.Google Scholar