publication . Article . 2017

Active modulation of the calcifying fluid carbonate chemistry (δ11B, B/Ca) and seasonally invariant coral calcification at sub-tropical limits

Claire L. Ross; James L. Falter; Malcolm T. McCulloch;
Open Access English
  • Published: 23 Oct 2017 Journal: Scientific Reports, volume 7, issue 1, pages 1-11 (issn: 2045-2322, Copyright policy)
  • Publisher: Nature Publishing Group
Abstract
Abstract Coral calcification is dependent on both the supply of dissolved inorganic carbon (DIC) and the up-regulation of pH in the calcifying fluid (cf). Using geochemical proxies (δ11B, B/Ca, Sr/Ca, Li/Mg), we show seasonal changes in the pHcf and DICcf for Acropora yongei and Pocillopora damicornis growing in-situ at Rottnest Island (32°S) in Western Australia. Changes in pHcf range from 8.38 in summer to 8.60 in winter, while DICcf is 25 to 30% higher during summer compared to winter (×1.5 to ×2 seawater). Thus, both variables are up-regulated well above seawater values and are seasonally out of phase with one another. The net effect of this counter-cyclical...
Subjects
free text keywords: coral, boron isotopes, pH up-regulation, calcification, Multidisciplinary, coral, boron isotopes, pH up-regulation, calcification, Article, lcsh:Medicine, lcsh:R, lcsh:Science, lcsh:Q, Saturation (chemistry), Coral, Dissolved organic carbon, Pocillopora damicornis, biology.organism_classification, biology, Ecology, Chemistry, Aragonite, engineering.material, engineering, Biomineralization, Environmental chemistry, Seawater, Carbonate, chemistry.chemical_compound
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