1 Release of Ecologically Relevant Metabolites by the Cyanobacterium, Synechococcus elongatus CCMP 1631 Cara L Fiore, Krista Longnecker, Melissa C Kido Soule, and Elizabeth B Kujawinski* Department of Marine Chemistry & Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, USA *Corresponding author 360 Woods Hole Rd. MS#4 Woods Hole, MA, USA 02543 Phone: 508-289-3493 Fax: 508-289-2164 ekujawinski@whoi.edu Running title: Metabolomics of Synechococcus