Abstract
The microzooplankton Antarctic community was studied during the Italian Expedition in the Ross Sea (November-December 1994). Water samples were collected, with sampling bottles, at surface, intermediate and bottom depths along an offshore transect (175°E between 72°00′S and 76°30′S) covering three distinct areas: a southern polynya, an intermediate marginal-ice zone and a northern ice-covered area. Microzooplankton ranged from a minimum of 1.92 ind l−1 to a maximum of 265 ind l−1. The community structure was very simple, constituted by typical Antarctic species. Heterotrophic dinoflagellates were abundant in the upper layers, reaching a maximum of 232 ind l−1. They were mostly constituted by the genera Protoperidinium and Gyrodinium. Micrometazoans prevailed over ciliates at most of the stations and depths; Foraminiferida and Radiolaria increased in bottom layers. A clearly decreasing gradient in both abundance and species diversity was observed from the polynya to the northernmost stations still covered by ice, as well as from the surface to bottom.
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Monti, M., Umani, S.F. (2000). Distribution of the Main Microzooplankton Taxa in the Ross Sea (Antarctica): Austral Summer 1994. In: Faranda, F.M., Guglielmo, L., Ianora, A. (eds) Ross Sea Ecology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-59607-0_22
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DOI: https://doi.org/10.1007/978-3-642-59607-0_22
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