Supplementary material to "Characterising the surface microlayer in the Mediterranean Sea: trace metals concentration and microbial plankton abundance"
A. Tovar‐Sánchez, A. Rodríguez-Romero, A. Engel, Birthe Zäncker, Franck Fu, E. Marañón, M. Pérez‐Lorenzo, M. Bressac, T. Wagener, K. Desboeuf, S. Triquet, G. Siour, C. Guieu