Calcification in the articulated coralline alga Corallina pilulifera,with special reference to the effect of elevated CO2 concentration |
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| Authors: | K Gao Y Aruga K Asada T Ishihara T Akano M Kiyohara |
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| Institution: | (1) Kansai Environmental Engineering Center, Nakazaki-nishi 2-3-39, Kita-ku, 530 Osaka, Japan;(2) Tokyo University of Fisheries, Konan-4, Minato-ku, 108 Tokyo, Japan;(3) Research Institute for Food Science, Kyoto University, 611 Uji, Kyoto, Japan;(4) Technical Research Center, The Kansai Electric Power Co. Inc., Nakoji, 661 Amagasaki, Hyogo-ken, Japan;(5) Present address: Hawaii Natural Energy Institute, University of Hawaii, 2540 Dole Street, 96822 Honolulu, Hawaii, USA |
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| Abstract: | Calcification in Corallina pilulifera Postels et Ruprecht displayed diurnal variations in aerated (350 ppm CO2) culture media, with faster rates during the light than during the dark period. Addition of CO2 (air+1250 ppm) inhibited calcification. This was attributable to the decreased pH resulting from CO2 addition. Both photosynthesis and calcification were enhanced in seawater, with elevated dissolved inorganic carbon concentrations at a constant pH of 8.2. |
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