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• W2014100879 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 279:105-112 (2004) - doi:10.3354/meps279105 Effect of light and temperature on calcification and strontium uptake in the scleractinian coral Acropora verweyi Stéphanie Reynaud1,*, Christine Ferrier-Pagès1, Florence Boisson2, Denis Allemand1, Richard G. Fairbanks3 1Centre Scientifique de Monaco, Avenue Saint Martin, 98000, Principality of Monaco 2IAEA Marine Environment Laboratory, 4 Quai Antoine 1er, BP 800, 98000, Principality of Monaco 3Lamont-Doherty Earth Observatory, 61 Rt. 9W/ PO Box 1000, Palisades, New York 10964, USA *Email: sreynaud@centrescientifique.mc ABSTRACT: Strontium thermometry has been suggested as a powerful tool for reconstructing seawater surface temperature (SST). In corals, an inverse relationship between SST and skeletal Sr/Ca ratios has been found. However, this ratio might also vary with calcification, which in turn is dependent on light and temperature. The aim of this study was to improve our knowledge of the uptake of Sr2+ as a function of light and temperature in the scleractinian coral Acropora verweyi. Two experiments were performed in which nubbins were acclimated over 4 wk either to 3 light intensities (100, 200 and 400 µmol m-2 s-1) or to 3 temperatures (20, 25, and 29°C) and growth rates were monitored. At the end of the 4 wk, nubbins were incubated, under the above light levels and temperatures, in individual beakers containing seawater spiked with the radiotracer 85Sr. Parallel incubations were carried out in dark beakers, in order to compare rates of Sr2+ incorporation in light and dark. The results obtained showed that growth rates were significantly higher under high light (0.16 ± 0.01 and 0.27 ± 0.01% d-1 for 100 and 400 µmol photons m-2 s-1) and under high temperature (0.06 ± 0.01% d-1 at 20°C to 0.35 ± 0.03% d-1 at 29°C). Rates of Sr2+ incorporation into the coral skeleton were also higher under high light (32.4 ± 3.0, 72.9 ± 13.5 and 91.2 ± 9.0 nmol (g dry weight, DW)-1 d-1, for corals cultured at 100, 200 and 400 µmol m-2 s-1 respectively) and high temperature (89 ± 14, 224 ± 38 and 436 ± 58 nmol (g DW)-1 d-1 for corals cultured at 20, 25 and 29°C respectively). Rates of Sr2+ uptake were also 2 to 3 times lower in the dark than in the light, comparable with the incorporation of calcium. Our results finally show a strong correlation between Sr2+ uptake and growth rates. Strontium uptake therefore follows the same pattern as calcium uptake, both ions being regulated by the calcification biochemistry. KEY WORDS: Coral · Skeleton · Strontium · Tracer · Calcification · Light · Temperature · Culture Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 279. Online publication date: September 28, 2004 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2004 Inter-Research." @default.
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• W2014100879 title "Effect of light and temperature on calcification and strontium uptake in the scleractinian coral Acropora verweyi" @default.
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