Phytoplankton community in the Western Arctic in July-August 2003

作者：Sergeeva V M^*; Sukhanova I N; Flint M V; Pautova L A; Grebmeier J M; Cooper L W

来源：Oceanology, 2010, 50(2): 184-197.

DOI：10.1134/S0001437010020049

The phytoplankton community was studied in Bering Strait and over the shelf, continental slope, and deep-water zones of the Chukchi and Beaufort seas in the middle of the vegetative season (July-August 2003). Its structure was analyzed in relation to ice conditions and the seasonal patterns of water warming, stratification, and nutrient concentrations. The overall ranges of variation in phytoplankton abundance and biomass were estimated at 2.0 x 10(2) to 6.0 x 10(6) cells/l and 0.1 to 444.1 mg C/m(3). The bulk of phytoplankton cells concentrated in the seasonal picnocline, at depths of 10-25 m. The highest values of cell density and biomass were recorded in regions influenced by the inflow of Bering Sea waters or characterized by intense hydrodynamics, such as the Bering Strait, Barrow Canyon, and the outer shelf and slope of the Chukchi Sea. In the middle of the vegetative season, the phytoplankton in the study region of the Western Arctic proved to comprise three successional (seasonal) assemblages, namely, the early spring, late spring, and summer assemblages. Their spatial distribution was dependent mainly on local features of hydrological and nutrient regimes rather than on general latitudinal trends of seasonal succession characteristic of arctic ecosystems.

• 出版日期2010-4