Biomass of nanoprotozooplankton in the Atlantic sector of the Southern Ocean ...

• Main Author: Becquevort, Sylvie
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1997
• Subjects: Oceanography; FOS Earth and related environmental sciences; MD78; Marion Dufresne 1972; Biogeochemical Processes in the Oceans and Fluxes PROOF; Joint Global Ocean Flux Study JGOFS; Antarc*; Antarctic; Southern Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.736976; https://doi.pangaea.de/10.1594/PANGAEA.736976

The dynamic of early spring nanoprotozoa was investigated in three characteristic water masses of the Southern Ocean: the Marginal Ice Zone, the intermediate waters of the Antarctic Circumpolar Current and the Polar Frontal Zone. Biomass and feeding activities of nanoprotozoa were measured, as well as the biomass of their potential prey-bacteria and phototrophic flagellates-on the 6°W meridian in the Southern Ocean along three repetitive transects between 47 and 60° South from October to November 1992. On average, nanoprotozooplankton biomass accounted for 77% of the combined biomass of bacteria and phototrophic flagellates, and was dominated by dinoflagellates and flagellates smaller than 5 µm. As a general trend, low protozoan biomass of 2 mg C/m**3 was typical of the ice covered area, while significantly higher biomasses culminating at 15 mg C/m**3 were recorded at the Polar Front. Biomasses of bacteria and total phytoplankton were distributed accordingly, with larger values at the Polar Front. ... : Supplement to: Becquevort, Sylvie (1997): Nanoprotozooplankton in the Atlantic sector of the Southern Ocean during early spring: biomass and feeding activities. Deep Sea Research Part II: Topical Studies in Oceanography, 44(1-2), 355-373 ...