CAJ | 학술논문

This initial research examines the presence,distribution and bioavailability of copper,chromium,nickel,manganese and iron in a wetland area of southern Guam.The research sites are within an area covered with saporite,a soil type derived from volcanic deposits on the island.Leaf tissue of Pandanus tectorius was extracted and analysed to determine the bioaccumulation of the target metals.Metal accumulation at sites considered aerobic and anaerobic was investigated together with an attempt to correlate actual accumulation of the target metals in the plant tissue with a recognised bioavailability indicator,in this case,three step sequential extraction scheme.Manganese was found to be accumulated in relatively high concentrations and to a lesser extent copper was also accumulated.Chromium,nickel and iron however exhibited very low accumulation factors.Accumulation of manganese in particular was significantly affected by aerobic conditions whereas the converse effect was experienced by copper.Significant correlation between various steps of a Sequential Extraction Scheme (SES) and actual accumulation was not achieved although the degree of aerobic conditions at each site and soil pH did affect concentrations of metals extracted by differing steps of SES.Results obtained suggest that further research in the area should be undertaken using different plant species and tissues.