Buoyancy regulation in two cyanobacteria / Jacobus Cornelis KromkampCyanobacterial waterblooms: the role of buoyancy in watercolumns of varying stability / Bastiaan Willem IbelingsNumerical and theoretical studies of water waves and floating bodies / Edwin Frank George van DaalenSolute transport in Sphagnum dominated bogs : the ecophysiological effects of mixing by convective flow / Wouter PatbergSolute transport in Sphagnum dominated bogs : the ecophysiological effects of mixing by convective flow / Wouter Patberg