Keywords: ANT-XXI/3; Asteromphalus hookeri; Asteromphalus hyalinus; Chaetoceros aequatoriale; Chaetoceros atlanticus; Chaetoceros bulbosus; Chaetoceros cf. castracanei; Chaetoceros convolutus; Chaetoceros criophilus; Chaetoceros debilis; Chaetoceros dichaeta; Chaetoceros peruvianus; Chaetoceros spp.; Corethron inerme; Corethron pennatum; CTD/Rosette; CTD-RO; Cylindrotheca closterium; Dactyliosolen antarcticus; DEPTH, water; Diatoms; Diatoms, discoidal; Discoid featureless; EIFEX; Eucampia antarctica; European Iron Fertilization Experiment; Fragilariopsis kerguelensis; Fragilariopsis obliquecostata; Fragilariopsis pseudonana; Fragilariopsis rhombica; Guinardia cylindrus; Guinardia delicatula; Guinardia tubiformis; Haslea sp.; Leptocylindrus mediterraneus; Lioloma sp.; Membraneis imposter; Navicula sp.; Odontella sp.; Pleurosigma antlanticus; Polarstern; Proboscia alata; Proboscia cf. truncata; Proboscia inermis; PS65/593-14; PS65 EIFEX; Pseudo-nitzschia heimii; Pseudo-nitzschia lineola; Pseudo-nitzschia prolongatoides; Pseudo-nitzschia turgidula; Pseudo-nitzschia turgiduloides; Quantitative phytoplankton method (Utermöhl, 1958); Rhizosolenia chunii; Rhizosolenia curvata; Rhizosolenia hebetata; Rhizosolenia simplex; South Atlantic Ocean; Thalassionema nitzschioides; Thalassionema nitzschioides var. lanceolata; Thalassiosira gracilis; Thalassiosira lentiginosa; Thalassiosira oliverana; Thalassiothrix antarctica; Trichotoxon sp.