TY - SER ID - prez2000aabo T1 - Abundance and biomass of planktic ciliates at time series station DYNAPROC AU - Pérez, M T AU - Dolan, John AU - Vidussi, Francesca AU - Fukai, E PY - 2000 T2 - Supplement to: Pérez, MT et al. (2000): Diel vertical distribution of planktonic ciliates within the surface layer of the NW Mediterranean (May 1995). Deep Sea Research Part I: Oceanographic Research Papers, 47(3), 479-503, https://doi.org/10.1016/S0967-0637(99)00099-0 PB - PANGAEA DO - 10.1594/PANGAEA.738713 UR - https://doi.org/10.1594/PANGAEA.738713 N2 - The composition and vertical distribution of planktonic ciliates within the surface layer was monitored over four diel cycles in May 95, during the JGOFS-France DYNAPROC cruise in the Ligurian Sea (NW Mediterranean). Ciliates were placed into size and trophic categories: micro- and nano-heterotrophic ciliates, mixotrophic ciliates, tintinnids and the autotrophic Mesodinium rubrum. Mixotrophic ciliates (micro and nano) represented an average of 46% of oligotrich abundance and 39% of oligotrich biomass; nano-ciliates (hetero and mixotrophic) were abundant, representing about 60 and 17% of oligotrich abundance and biomass, respectively. Tintinnid ciliates were a minor part of heterotrophic ciliates. The estimated contribution of mixotrophs to chlorophyll a concentration was modest, never exceeding 9% in discrete samples. Vertical profiles of ciliates showed that chlorophyll-containing ciliates (mixotrophs and autotrophs) were mainly concentrated and remained at the chlorophyll a maximum depth. In contrast, among heterotrophic ciliates, a portion of the population appeared to migrate from 20-30 m depth during the day to the surface at night or in the early morning. Correlation analyses of ciliate groups and phytoplankton pigments showed a strong relationship between nano-ciliates and zeaxanthin, and between chlorophyll-containing ciliates and chlorophyll a, as well as other pigments that were maximal at the chlorophyll a maximum depth. Total surface layer concentrations showed minima of ciliates during nightime/early morning hours. ER -