Radiolaria (protozoans) 26 Foraminifera 14 radiolaria 12 Ciliophora 8 Atlantic Ocean 6 Dinophyceae 6 Pacific 6 biomass 6 vertical distribution 6 water column 6 zooplankton 6 Argentina 4 Brachiopoda 4 Copepoda 4 Jurassic 4 Mollusca 4 Ostracoda 4 Patagonian Shelf 4 Polycystinea 4 Protista 4 South America 4 Stylodictya multispina 4 Tintinnidae 4 bathymetry 4 chlorophyll a 4 ciliate 4 continental shelf 4 cross-shelf distribution 4 crustacean 4 dinoflagellate 4