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2003 | 45 | 1 |
Tytuł artykułu

Seasonal dynamics of phytoplankton in the inner Neva Estuary in the 1980s and 1990s

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Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The phytoplankton in the inner Neva Estuary is described from data obtained from 1996 to 2000.T he seasonal dynamics of the phytoplankton biomass are characterized by a bimodal curve with a summer maximum.T he average seasonal biomass was approximately 3 mg l−1, the maximum biomass was 8–11 mg l−1. The species composition and quantitative parameters were compared to those observed in the 1980s.A notable, nearly 1.5–2 fold, increase in the biomass in the summer–autumn period and the predominance of Oscillatoria species among the blue-green algae were observed.A decline in the nutrient load in the water body at the end of the 1990s appeared to be insufficient to bring about a decrease in the proportion of Oscillatoria algae in the total species composition or a decline in the biomass of the entire phytoplankton community. In 2000 a certain change in the structural composition of the phytoplankton complex was noted.S pecies that had been predominant in the 1980s and had lost their advantage in the early 1990s, regained their earlier status.
Wydawca
-
Czasopismo
Rocznik
Tom
45
Numer
1
Opis fizyczny
p.25-39,fig.,ref.
Twórcy
  • Russian Academy of Sciences, Universitetskay nab. 1, 199034 St.Petersburg, Russia
Bibliografia
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  • Nikulina V.N ., 1996, Plankton algae as an indicator of the ecological condition of water bodies, [in:] Ecological state of aquatic ecosystems in the Neva River basin, A.F. Alimov & A.K.F rolov (eds.), Sci.Cen ter RAS, St.P etersburg, 13–35, (in Russian).
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Typ dokumentu
Bibliografia
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Identyfikator YADDA
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