Cyclopoida Copepoda 20 Calanoida 14 abundance 12 zooplankton 8 Appendicularia (class) 6 Argentina 6 Biomass 6 Zooplankton 6 biomass 6 community composition 6 crustacean 6 Atlantic Ocean 4 Atlantic Ocean (Southwest) 4 Bacillariophyta 4 Chlorophyta 4 Ciliophora 4 Copepods 4 Cyanobacteria 4 Cyclopidae 4 Diacyclops 4 Harpacticoida 4 Microbial communities 4 New species 4 Oithona similis 4 Phytoplankton 4 Rotifera 4 Taxonomy 4 Top-down control 4 Trophic cascade 4