Datatset associated to Journal of Marine Systems submission : Ms. No. MARSYS-D-21-00246R1

Individual growth increment measurements (µm) of the 21 live collected <em>A. islandica</em> used in the publication entitled : "The 18.6-year lunar nodal cycle may affect ecosystems on the Northwest Atlantic continental shelves". All information regarding data acquisition are presented in the section "2. Construction of <em>Arctica islandica </em>master chronology" of the article submitted to Journal of Marine Systems. Data are presented as a "Tucson File" which is a standard format for tree-ring dataset (see : http://www.cybis.se/wiki/index.php?title=Tucson_format for a precise description).