Data (mean and standard deviation, n=3) of biological parameters presented as figures in the manuscript: primary production (mg C.m^-3.d^-1); flow cytometry cell abundance (picoeukaryotes, nanoeukaryotes, Synechococcus, heterotrophic bacteria; cells.mL^-1); pigments (total chlorophyll and fucoxanthin; µg.L^-1 ; and peridinin, 19-Hexanoyloxyfucoxanthin, alloxanthin, 19-Butanoyloxyfucoxanthin, zeaxanthin, total chlorophyll b; ng.L^-1); biogenic silica (µmol.L^-1). n.d. = not determined, bdl = below detection limit.