Abstract
Temperature tolerance in the reef coral Montipora verrucosa (Lamarck) is affected by salinity and light. Low salinity reduces ability of the coral to survive shortterm exposure to elevated temperature. High natural light intensity aggravates damage sustained by corals at high temperature. In long-term growth experiments, high light intensity caused substantial loss of zooxanthellar pigment, higher mortality rates, reduced carbon fixation and lowered growth rate at both upper and lower sublethal temperatures Effects of light at optimal temperature were less dramatic. Interactions between physical environmental factors appear to be most important near the limits of tolerance for a given factor. Acclimation capability was indicated, and was influenced by both thermal history and pigmentation state of stressed corals.
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Communicated by M.R. Tripp, Newark
Contribution No. 543 of the Hawaii Institute of Marine Biology.
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Coles, S.L., Jokiel, P.L. Synergistic effects of temperature, salinity and light on the hermatypic coral Montipora verrucosa . Marine Biology 49, 187–195 (1978). https://doi.org/10.1007/BF00391130
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DOI: https://doi.org/10.1007/BF00391130