Ultraplankton of the Gulf of Naples by Flow Cytometry

  • R. Casotti
  • C. Brunet
  • A. Graziano


Ultraplankton composition and distribution were investigated as a function of physical structures and water masses of the Gulf of Naples in November 1995. Cyanobacteria were distributed all over the Gulf, but mostly in the surface mixed layer. Prochlorophytes were more abundant off-shore and at depth. Small eukaryotes were typical of the surface of coastal stations. Prochlorophytes vertical distribution showed a peculiar profile, with two populations at depth, where the Modified Atlantic Water (MAW) was present. A periodic sampling of a fixced station in the Gulf of Naples started in June 1998 in order further to investigate environmental parameters ruling this vertical distribution. Preliminary data interpretation is discussed. During the November cruise, bacterial abundances were correlated to chlorophyll a concentrations, and, despite the strong oligotrophy of the area, bacterial carbon never exceeded phytoplankton carbon.


Coastal Station Bacterial Carbon Levantine Basin Oligotrophic Area Station Aloha 
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Copyright information

© Springer-Verlag Italia 2001

Authors and Affiliations

  • R. Casotti
    • 1
  • C. Brunet
    • 2
  • A. Graziano
    • 1
  1. 1.Stazione Zoologica “A. Dohrn”NapoliItaly
  2. 2.Laboratoire Interdisciplinaire des Sciences de l’Environnement (LISE)Université du LittoralWimereuxFrance

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