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Proc Biol Sci. 2003 January 22; 270(1511): 179–184.
PMCID: PMC1691223

Suppression of skeletal growth in scleractinian corals by decreasing ambient carbonate-ion concentration: a cross-family comparison.


Biogenic calcification is influenced by the concentration of available carbonate ions. The recent confirmation of this for hermatypic corals has raised concern over the future of coral reefs because [CO(3)(2-)] is a decreasing function of increasing pCO(2) in the atmosphere. As one of the overriding features of coral reefs is their diversity, understanding the degree of variability between species in their ability to cope with a change in [CO(3)(2-)] is a priority. We cultured four phylogenetically and physiologically different species of hermatypic coral (Acropora verweyi, Galaxea fascicularis, Pavona cactus and Turbinaria reniformis) under 'normal' (280 micromol kg(-1)) and 'low' (140 micromol kg(-1)) carbonate-ion concentrations. The effect on skeletogenesis was investigated quantitatively (by calcification rate) and qualitatively (by microstructural appearance of growing crystalline fibres using scanning electron microscopy (SEM)). The 'low carbonate' treatment resulted in a significant suppression of calcification rate and a tendency for weaker crystallization at the distal tips of fibres. However, while the calcification rate was affected uniformly across species (13-18% reduction), the magnitude of the microstructural response was highly species specific: crystallization was most markedly affected in A. verweyi and least in T. reniformis. These results are discussed in relation to past records and future predictions of carbonate variability in the oceans.

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Selected References

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  • Berner RA. Atmospheric carbon dioxide levels over phanerozoic time. Science. 1990 Sep 21;249(4975):1382–1386. [PubMed]
  • Kleypas JA, Buddemeier RW, Archer D, Gattuso JP, Langdon C, Opdyke BN. Geochemical consequences of increased atmospheric carbon dioxide on coral reefs . Science. 1999 Apr 2;284(5411):118–120. [PubMed]
  • Lough JM, Barnes DJ. Environmental controls on growth of the massive coral Porites. J Exp Mar Bio Ecol. 2000 Mar 15;245(2):225–243. [PubMed]
  • LOWRY OH, ROSEBROUGH NJ, FARR AL, RANDALL RJ. Protein measurement with the Folin phenol reagent. J Biol Chem. 1951 Nov;193(1):265–275. [PubMed]
  • Pearson PN, Palmer MR. Atmospheric carbon dioxide concentrations over the past 60 million years. Nature. 2000 Aug 17;406(6797):695–699. [PubMed]
  • Riebesell U, Zondervan I, Rost B, Tortell PD, Zeebe RE, Morel FM. Reduced calcification of marine plankton in response to increased atmospheric CO2. Nature. 2000 Sep 21;407(6802):364–367. [PubMed]
  • Stanley GD, Jr, Fautin DG. Paleontology and evolution. The origins of modern corals. Science. 2001 Mar 9;291(5510):1913–1914. [PubMed]

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