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Ocean acidification and temperature rise: effects on calcification during early development of the cuttlefish Sepia officinalis |
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| Authors: | Narimane Dorey Frank Melzner Sophie Martin François Oberhänsli Jean-Louis Teyssié Paco Bustamante Jean-Pierre Gattuso Thomas Lacoue-Labarthe |
| Institution: | 1. International Atomic Energy Agency, Environment Laboratories (IAEA-EL), 4 Quai Antoine Ier, Principality of Monaco, 98000, Monaco, Monaco 8. Department of Biological and Environmental Sciences, The Sven Lovén Center for Marine Science, Kristineberg, University of Gothenburg, 45034, Fiskeb?ckskil, Sweden 2. Marine Ecology, Helmholtz Centre for Ocean Research (GEOMAR), 24105, Kiel, Germany 5. CNRS, Laboratoire Adaptation et Diversité en Milieu Marin, Station Biologique de Roscoff, Place Georges Teissier, 29682, Roscoff Cedex, France 6. Université Pierre et Marie Curie, Paris 06, Laboratoire Adaptation et Diversité en Milieu Marin, Station Biologique de Roscoff, Place Georges Teissier, 29682, Roscoff Cedex, France 3. Littoral, Environnement et Sociétés (LIENSs), UMR 7266, CNRS-Université de La Rochelle, 2 rue Olympe de Gouges, 17000, La Rochelle Cedex, France 4. Université Pierre et Marie Curie-Paris 6, Observatoire Océanologique de Villefranche, 06230, Villefranche-sur-Mer, France 7. CNRS-INSU, Laboratoire d’Océanographie de Villefranche, BP 28, 06234, Villefranche-sur-Mer Cedex, France |
| Abstract: | This study investigated the effects of seawater pH (i.e., 8.10, 7.85 and 7.60) and temperature (16 and 19 °C) on (a) the abiotic conditions in the fluid surrounding the embryo (viz. the perivitelline fluid), (b) growth, development and (c) cuttlebone calcification of embryonic and juvenile stages of the cephalopod Sepia officinalis. Egg swelling increased in response to acidification or warming, leading to an increase in egg surface while the interactive effects suggested a limited plasticity of the swelling modulation. Embryos experienced elevated pCO2 conditions in the perivitelline fluid (>3-fold higher pCO2 than that of ambient seawater), rendering the medium under-saturated even under ambient conditions. The growth of both embryos and juveniles was unaffected by pH, whereas 45Ca incorporation in cuttlebone increased significantly with decreasing pH at both temperatures. This phenomenon of hypercalcification is limited to only a number of animals but does not guarantee functional performance and calls for better mechanistic understanding of calcification processes. |
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