Effects of increased pCO 2 on zinc uptake and calcification in the tropical coral Stylophora pistillata

Publication Type:
Journal Article
Citation:
Coral Reefs, 2012, 31 (1), pp. 101 - 109
Issue Date:
2012-03-01
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Zinc (Zn) is an essential element for corals. We investigated the effects of ocean acidification on zinc incorporation, photosynthesis, and gross calcification in the scleractinian coral Stylophora pistillata. Colonies were maintained at normal pHT(8.1) and at two low-pH conditions (7.8 and 7.5) for 5 weeks. Corals were exposed to65Zn dissolved in seawater to assess uptake rates. After 5 weeks, corals raised at pHT(8.1) exhibited higher65Zn activity in the coral tissue and skeleton, compared with corals raised at a lower pH. Photosynthesis, photosynthetic efficiency, and gross calcification, measured by45Ca incorporation, were however unchanged even at the lowest pH. © 2011 Springer-Verlag.
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