Abstract
Corals in a polluted estuary in Hong Kong show clear signs of increasing pollution stress. Growth rates, species number, abundance and diversity declined between 1980 and 1986 during a period of decreasing water quality. Uptake of pollutants is recorded in the coral skeletons and is measured with a new, extremely sensitive technique able to analyse all heavy-metal contaminants in the same sample. This technique indicates that corals contain Al, Cd, Cu, Pb, U, V and Y. Total acid-insoluble material measured by skeletal dissolution is also high. These contaminants increase with time and pollution stress.
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