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Phytoplankton trends in the Baltic Sea
Wasmund, N.; Uhlig, S. (2003). Phytoplankton trends in the Baltic Sea. ICES J. Mar. Sci./J. Cons. int. Explor. Mer 60(2): 177-186
In: ICES Journal of Marine Science. Academic Press: London. ISSN 1054-3139; e-ISSN 1095-9289, more
Peer reviewed article  

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Keywords
    Algae > Diatoms
    Organic compounds > Carbohydrates > Glycosides > Pigments > Photosynthetic pigments > Chlorophylls
    Temporal variations > Long-term changes
    Cyanobacteria [WoRMS]; Dinoflagellata [WoRMS]
    ANE, Baltic [Marine Regions]
    Marine

Authors  Top | Datasets 
  • Wasmund, N., more
  • Uhlig, S.

Abstract
    Monitoring data of phytoplankton abundance and biomass (1979-1999) and Chl. a (1979-2000) from surface samples (0-10 m) of the Kattegat, Belt Sea and Baltic proper were investigated for long-term trends. The Mann-Kendall test as well as the LOESS smoother was applied for three taxonomic groups in spring, summer and autumn separately. Chl. a trends were analysed by linear regression. Downward trends were found for diatoms in spring and summer whereas dinoflagellates generally increased in the Baltic proper but decreased in the Kattegat. In autumn, diatoms increased at some stations. For cyanobacteria, downward trends were detected mainly in the Kattegat/Belt Sea area. Chl. a concentrations showed a general decrease in the Kattegat/Belt Sea area but an increase in the Baltic proper. Observed changes in trends during the two decades might indicate shifts in the ecosystem.

Datasets (2)
  • IOW phytoplankton monitoring (HELCOM)/ ODIN Version 2004, more
  • IOW/HELCOM phytoplankton monitoring version 2007, more

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