Lethal and sublethal effects of dredging on reef corals |
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| Authors: | Rolf PM Bak |
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| Institution: | Caribbean Marine Biological Institute (Carmabi), Piscaderabaai, Curaçao, Netherlands Antilles Netherlands |
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| Abstract: | Effects of dredging on a coral reef are described. Under water light values at a depth of 12–13 m were reduced from about 30% to less than 1% surface illumination. Colonies of coral species which are inefficient sediment rejectors (Porites astreoides) lost their zooxanthellae and died. Calcification rates in Madracis mirabilis and Agaricia agaricites were observed to decrease by 33%. The period of suppressed calcification exceeds that of environmental disturbance. |
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