CITATION Morris, J.T., K. Sundberg, and C.S. Hopkinson. 2013. Salt marsh primary production and its responses to relative sea level and nutrients in estuaries at Plum Island, Massachusetts, and North Inlet, South Carolina, USA. Oceanography 26(3):78–84, http://dx.doi.org/10.5670/ oceanog.2013.48. DOI http://dx.doi.org/10.5670/oceanog.2013.48 COPYRIGHT Tis article has been published in Oceanography, Volume 26, Number 3, a quarterly journal of Te Oceanography Society. Copyright 2013 by Te Oceanography Society. All rights reserved. USAGE Permission is granted to copy this article for use in teaching and research. Republication, systematic reproduction, or collective redistribution of any portion of this article by photocopy machine, reposting, or other means is permitted only with the approval of Te Oceanography Society. Send all correspondence to: info@tos.org or Te Oceanography Society, PO Box 1931, Rockville, MD 20849-1931, USA. O ceanography THE OFFICIAL MAGAZINE OF THE OCEANOGRAPHY SOCIETY DOWNLOADED FROM HTTP://WWW.TOS.ORG/OCEANOGRAPHY