eesti teaduste
akadeemia kirjastus
Estonian Journal of Ecology

Selecting potential summer phytoplankton eutrophication indicator species for the northern Baltic Sea; 297-311

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Kaire Toming, Andres Jaanus


The composition, abundance, and biomass of aquatic flora, including phytoplankton, belong to the key biological indicators according to the EU Water Framework Directive. The changes in physico-chemical conditions lead directly or indirectly to impacts on biological quality elements. In order to identify which phytoplankton taxa may be indicative of ambient nutrient concentrations, we analysed the seasonal biomass pattern of selected dominant species and simultaneously measured hydrographical and chemical parameters. High frequency data were collected on the transect of the central Gulf of Finland in summer periods (from June to August) of 1997-2004. The relationships between abiotic and biotic variables were studied by linear correlation, regression, and multivariate BIO-ENV analyses. Among 14 selected taxa we found only 3 species (the diatoms Skeletonema costatum, Cyclotella choctawhatcheeana, and Cylindrotheca closterium) that responded regularly to enhanced nutrient concentrations having higher biomasses in coastal areas and following a similar temporal pattern. We suggest that some species (e.g. Heterocapsa triquetra, Eutreptiella gymnastica) are opportunistic and short-term changes in their biomass are not related to eutrophication levels.


Bianchi, T. S., Westman, P., Rolff, C., Engelhaupt, E., Andrén, T. & Elmgren, R. 2000. Cyano­bacterial blooms in the Baltic Sea: natural or human induced? Limnol. Oceanogr., 45, 716–726.

Clarke, K. R. & Warwick, R. M. 2001. Change in Marine Communities: An Approach to Statistical Analysis and Interpretation, 2nd edn. Plymouth Marine Laboratory, Plymouth.

Cloern, J. E. 2001. Our evolving conceptual model of the coastal eutrophication problem. Mar. Ecol. Progr. Ser., 210, 223–253.

Elmgren, R. 1989. Man’s impact on the ecosystem of the Baltic Sea: energy flows today and at the turn of the century. Ambio, 18, 326–332.

Finni, T., Kononen, K., Olsonen, R. & Wallström, K. 2001a. The history of cyanobacterial blooms in the Baltic Sea. Ambio, 30, 172–178.

Finni, T., Laurila, S. & Laakkonen, S. 2001b. The history of eutrophication in the sea area of Helsinki in the 20th century. Long-term analysis of plankton assemblages. Ambio, 30, 264–271.

Gasiùnaite, Z. R., Cardoso, A. C., Heiskanen, A.-S., Henriksen, P., Kauppila, P., Olenina, I., Pilkaityte, R., Purina, I., Razinkovas, A., Sagert, S., Schubert, H. & Wasmund, N. 2005. Seasonality of coastal phytoplankton in the Baltic Sea: influence of salinity and eutrophi­cation. Estuar. Coast. Shelf Sci., 65, 239–252.

Granéli, E., Wallström, K., Larsson, U., Granéli, W. & Elmgren, R. 1990. Nutrient limitation of primary production in the Baltic Sea area. Ambio, 19, 142–151.

Hajdu, S., Pertola, S. & Kuosa, H. 2004. Prorocentrum minimum (Dinophyceae) in the Baltic Sea: morphology, occurrence – a review. Harmful Algae, 4, 471–480.

HELCOM. 2003. The Baltic marine environment 1999–2002. Balt. Sea Environ. Proc., 87, 47.

Jacobson, D. M. & Andersen, R. A. 1994. The discovery of mixotrophy in photosynthetic species of Dinophysis (Dinophyceae): light and electron microscopical observations of food vacuoles in Dinophysis acuminata, D. norvegica and two heterotrophic dinophysoid dinoflagellates. Phycologia, 33, 97–100.

Kahru, M., Horstmann, U. & Rud, O. 1994. Increased cyanobacterial blooming in the Baltic Sea detected by satellites: natural fluctuation or ecosystem change? Ambio, 23, 469–472.

Kivi, K., Kaitala, S., Kuosa, H., Kuparinen, J., Leskinen, E., Lignell, R., Marcussen, B. & Tammi­nen, T. 1993. Nutrient limitation and grazing control of Baltic plankton community during annual succession. Limnol. Oceanogr., 38, 893–905.

Kononen, K. 1988. Phytoplankton summer assemblages in relation to environmental factors at the entrance of the Gulf of Finland during 1972–1985. Kiel. Meeresforsch., 6, 281–294.

Kuosa, H. 1988. Observations on the taxonomy and ecology of Monoraphidium (Chlorophyceae, Chlorococcales) and Koliella (Chlorophyceae, Ulotrichales) species in the Tvärminne Sea area, SW coast of Finland. Arch. Protistenkd., 135, 45–53.

Laanemets, J., Kononen, K., Pavelson, J. & Poutanen, E.-L. 2004. Vertical location of seasonal nutriclines in the western Gulf of Finland. J. Mar. Syst., 52, 1–13.

Lagus, A., Suomel, J., Weithoff, G., Heikkilä, K., Helminen, H. & Sipura, J. 2004. Species-specific differences in phytoplankton responses to N and P enrichments and the N : P ratio in the Archipelago Sea, northern Baltic Sea. J. Plankt. Res., 26, 779–798.

Larsson, U., Elmgren, R. & Wulff, F. 1985. Eutrophication and the Baltic Sea: causes andconsequences. Ambio, 14, 9–14.

Lehtimäki, J., Moisander, P., Sivonen, K. & Kononen, K. 1997. Growth, nitrogen fixation, and nodularin production by two Baltic Sea cyanobacteria. Appl. Environ. Microbiol., 63, 1647–1656.

Lignell, R., Seppälä, J., Kuuppo, P., Tamminen, T., Andersen, T. & Gismervik, I. 2003. Beyond bulk properties: responses of coastal summer plankton communities to nutrient enrichment in the northern Baltic Sea. Limnol. Oceanogr., 48(1), 189–209.

Lindholm, T. & Nummelin, C. 1999. Red tide of the dinoflagellate Heterocapsa triquetra (Dinophyta) in a ferry-mixed coastal inlet. Hydrobiologia, 393, 245–251.

Lundberg, C., Lönnroth, M., von Numers, M. & Bonsdorff, E. 2005. A multivariate assessment of coastal eutrophication. Examples from the Gulf of Finland, northern Baltic Sea. Mar. Pollut. Bull., 50, 1185–1996.

Margalef, R. 1978. Life-forms of phytoplankton as survival alternatives in an unstable environment. Ocean. Acta, 1, 493–509.

Mischke, U. 2003. Cyanobacteria associations in shallow polytrophic lakes: influence of environmental factors. Acta Oecol., 24, 11–24.

Nixdorf, B., Mischke, U. & Rücker, J. 2003. Phytoplankton assemblages and steady state in deep and shallow eutrophic lakes – an approach to differentiate the habitat properties of Oscillatoriales. Hydrobiologia, 502, 111–121.

Niemi, Å. & Hällfors, G. 1974. Some phytoplankton species from Baltic waters. Mem. Soc. Fauna Flora Fenn., 49, 77–93.

Nixon, S. W. 1995. Coastal marine eutrophication: a definition, social causes, and future concerns. Ophelia, 41, 199–219.

Olli, K., Heiskanen, A.-S. & Seppälä, J. 1996. Development and fate of Eutreptiella gymnastica bloom in nutrient-enriched enclosures in the coastal Baltic Sea. J. Plankton Res., 18(9), 1587–1604.

Olli, K. & Seppälä, J. 2001. Vertical niche separation of phytoplankton: large-scale mesocosm experiments. Mar. Ecol. Progr. Ser., 217, 219–233.

Pertola, S., Kuosa, H. & Olsonen, R. 2004. Is the invasion of Prorocentrum minimum (Dinophyceae) related to the nitrogen enrichment of the Baltic Sea? Harmful Algae, 4, 481–492.

Pitkänen, H., Lehtoranta, J. & Räike, A. 2001. Internal nutrient fluxes counteract decreases in external load: the case of the estuarial Eastern Gulf of Finland, Baltic Sea. Ambio, 30, 195–201.

Rantajärvi, E., Gran, V., Hällfors, S. & Olsonen, R. 1998. Effects of environmental factors on the phytoplankton community in the Gulf of Finland – unattended high frequency measure­ments and multivariate analyses. In Eutrophication in Planktonic Ecosystems: Food Web Dynamics and Elemental Cycling (Tamminen, T. & Kuosa, H., eds), Hydrobiologia, 363, 127–139.

Rosenberg, R., Elmgren, R., Fleischer, S., Jonsson, P., Persson, G. & Dahlin, H. 1990. Marine eutrophication case studies in Sweden. Ambio, 19, 102–108.

Rydin, E., Hyenstrand, P., Gunnerhed, M. & Bomqvist, P. 2002. Nutrient limitation of cyano­bacterial blooms: an enclosure experiment from the coastal zone of the NW Baltic Proper. Mar. Ecol. Prog. Ser., 239, 31–36.

Stal, L. J., Staal, M. & Villbrandt, M. 1999. Nutrient control of cyanobacteria blooms in the Baltic Sea. Aquat. Microb. Ecol., 18, 165–173.

Utermöhl, H. 1958. Zur Vervollkommnung der quantitativen Phytoplankton Metodik. Mitt. Int. Ver. Limnol., 9, 1–38.

Vollenweider, R. A., Marchetti, R. & Viviani, R. 1992. Marine Coastal Eutrophication. Elsevier, London.

Vuorio, K., Lagus, A., Lehtimäki, J. M., Suomela, J. & Helminen, H. 2005. Phytoplankton community responses to nutrient and iron enrichment under different nitrogen to phosphorus ratios in the northern Baltic Sea. J. Exp. Mar. Biol. Ecol., 322, 39–52.

Wasmund, N. & Uhlig, S. 2003. Phytoplankton trends in the Baltic Sea. ICES J. Mar. Sci., 60, 177186.

Wiedner, C., Nixdorf, B., Hinze, R., Wirsing, B., Neumann, U. & Weckesser, J. 2002. Regulation of cyanobacteria and microcystin dynamics in polymictic shallow lakes. Arch. Hydrobiol., 155, 383–400.

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