Genetic flow directionality and geographical segregation in a Cymodocea nodosa genetic diversity network A Paolo Masucci, Sophie Arnaud-Haond, Víctor M Eguíluz, Emilio Hernández-García and Ester A Serrão EPJ Data Sci., 1 1 (2012) 11 Published online: 28 November 2012 DOI: 10.1140/epjds11