Phytoplankton of the Large Aral Sea in June 2008 |
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| Authors: | L S Zhitina |
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| Institution: | 1.Faculty of Biology,Moscow State University,Moscow,Russia |
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| Abstract: | The species composition, cell concentration, and biomass in the surface layer were determined at 10 stations in the central
part of the Western Basin (WB) and one station in the Eastern Basin (EB) of the Large Aral Sea. A total of 42 algae species
were found. Diatoms had the highest number of species. The similarity of the phytoplankton composition in the WB was high,
whereas the phytoplankton composition in the WB and EB differed significantly. In the WB, the cell concentration and biomass
of the phytoplankton varied from 826 × 103 to 6312 × 103 cells/l (the mean value was 1877 × 1586 × 103 cells/l) and from 53 to 241 μgC/l (the mean value was 95 × 56 μgC/l). In the EB, the phytoplankton abundance was 915 × 103 cells/l and 93 μgC/l. The vertical distribution of the phytoplankton in upper 35 m was investigated at one station in the
WB. The maximum values of the algal cell concentration and biomass were recorded under the thermocline at the 20 m depth.
The integrated biomass of the phytoplankton was 14 gC/m2. |
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