Coral resistance to ocean acidification linked to increased calcium at the site of calcification
| Type | : | ACL |
|---|---|---|
| Nature | : | Production scientifique |
| Au bénéfice du Laboratoire | : | Non |
| Statut de publication | : | Publié |
| Année de publication | : | 2018 |
| Auteurs (4) | : | DE CARLO T,m COMEAU Steeve CORNWALL Christopher,e MCCULLOCH M |
| Revue scientifique | : | Proceedings of The Royal Society B-biological Sciences |
| Volume | : | |
| Fascicule | : | |
| Pages | : | |
| DOI | : | 10.1098/rspb.2018.0564 |
| URL | : | - |
| Abstract | : | Ocean acidification threatens the persistence of biogenic calcium carbonate (CaCO3) production on coral reefs. However, some coral genera show resist- ance to declines in seawater pH, potentially achieved by modulating the chemistry of the fluid where calcification occurs. We use two novel geochem- ical techniques based on boron systematics and Raman spectroscopy, which together provide the first constraints on the sensitivity of coral calcifying fluid calcium concentrations (1⁄2Ca2þ cf) to changing seawater pH. In response to simulated end-of-century pH conditions, Pocillopora damicornis increased 1⁄2Ca2þ cf to as much as 25% above that of seawater and maintained constant calcification rates. Conversely, Acropora youngei displayed less control over 1⁄2Ca2þ cf, and its calcification rates strongly declined at lower seawater pH. Although the role of 1⁄2Ca2þ cf in driving calcification has often been neglected, increasing 1⁄2Ca2þ cf may be a key mechanism enabling more resist- ant corals to cope with ocean acidification and continue to build CaCO3 skeletons in a high-CO2 world. |
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| Commentaire | : | - |
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| Fichier attaché | : | - |
| Citation | : |
De Carlo TM, Comeau S, Cornwall CE, McCulloch M (2018) Coral resistance to ocean acidification linked to increased calcium at the site of calcification. P Roy Soc B-biol Sci | doi: 10.1098/rspb.2018.0564
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