The effect of copper on the settlement success of larvae from the scleractinian coral acropora tenuis
Reichelt-Brushett, AJ & Harrison, PL 2000, 'The effect of copper on the settlement success of larvae from the scleractinian coral acropora tenuis', Marine Pollution Bulletin, vol. 41, no. 7-12, pp. 385-391.
Published version available from:
This study examined the effect of copper on the settlement success of planula larvae of the reef-building coral Acropora tenuis during 1994 and 1996 at Magnetic Island, Great Barrier Reef. Copper concentrations of 2, 10, 20 μg l−1 did not inhibit larval settlement after 48-h exposure. However, copper concentrations of 42 μg l−1 and 81 μg l−1 significantly reduced settlement success of A. tenuis larvae after 48-h exposure compared with controls using normal seawater. At 200 μg l−1 copper, all larvae died. EC50 values for the effect of copper on A. tenuis larval settlement were calculated from the 1996 results using measured copper concentrations. The 48-h EC50 was 35 μg l−1 with an upper and lower 95% confidence limit of 37 μg l−1 and 32 μg l−1, respectively. The 48-h NOEC value for both experiments was 20 μg l−1 copper. These experiments provide some of the first data on sub-lethal effects of trace metals on tropical marine organisms, and demonstrate that relatively low copper concentrations impair or inhibit settlement of coral larvae.