1 The impact of seawater saturation state and bicarbonate ion concentration on calcification by new recruits of two Atlantic corals S. J. de Putron 1 , D. C. McCorkle 2 , A. L. Cohen 2 , A. Dillon 3 1 Bermuda Institute of Ocean Sciences, 17 Biological Lane, Ferry Reach, St, Georges, GE 01, Bermuda 2 Woods Hole Oceanographic Institution, Woods Hole, MA, 02543 3 Ecology and Evolutionary Biology Department, Princeton University, Princeton, NJ 08544 Communicating Author: Samantha J. de Putron Email: Samantha.deputron@bios.edu Tel: + 441 297 1880 ext 724 Fax: + 441 297 8143 Keywords: Coral, Calcification, Ocean Acidification, recruitment, carbonate ion