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Abstract Zooplankton in shelf waters is dominated by a highly diverse assemblage of copepods, followed by a variety of organisms sorted according to the environmental conditions. Epipelagic copepod, chaetognath and… Click to show full abstract
Abstract Zooplankton in shelf waters is dominated by a highly diverse assemblage of copepods, followed by a variety of organisms sorted according to the environmental conditions. Epipelagic copepod, chaetognath and cladoceran species assemblages in the upper 100 m layer, together with mesozooplankton major groups were characterized in relation to dynamics of the water masses in the subtropical domain of the Brazilian shelf. Water samples for nutrients and chlorophyll, measurements of temperature, salinity and fluorescence (Rosette/CTD) and zooplankton samples were collected in four transects (26°S to 29°S), ~ 250 km long, across the shelf, during early summer. Intrusions of the cold South Atlantic Central Water (~ 15 m) was evidenced by the large abundance (> 3000 ind.m-3) of the small copepod Oncaea venusta, highlighting the role of small omnivorous copepods in the coastal upwelling at ~ 26°S. Low-salinity waters (
Journal Title: Continental Shelf Research
Year Published: 2018
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