Contributors and references


Saku Anttila*,1, Vivi Fleming-Lehtinen1, Jenni Attila1, Sofia Junttila1 , Heidi Hällfors1, Norbert Wassmund2, and Joni Kaitaranta3.

1) Finnish Environment Institute (SYKE), P O Box 140, FI-00251, Helsinki, Finland.

2) Leibniz Institute for Baltic Sea Research, Seestr. 15, D-18119 Warnemünde, Germany

3) HELCOM Secretariat

* email address

HELCOM Expert Network on Eutrophication



This version of the HELCOM pre-core indicator report was published in July 2018:

Cyanobacterial bloom index HELCOM pre-core indicator 2018 (pdf)

Earlier versions of the core indicator report include:

HOLAS II component – Pre-core indicator report – web-based version July 2017 (pdf)



Anonymous. 2000. DIRECTIVE 2000/60/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 23 October 2000 establishing a framework for Community action in the field of water policy (Water Framework Directive). Official Journal of the European Union, L 327/2, 22.12.2000.

Anttila S.,  Fleming-Lehtinen V., Attila J., Junttila S., Alasalmi H., Hällfors H., Kervinen M. and Koponen S. 2018. A novel earth observation based ecological indicator for cyanobacterial blooms. International Journal of Applied Earth Observation and Geoinformation 64: 145-155.

Anonymous. 2008. Directive 2008/56/EC of the European Parliament and the Council of 17 June 2008 establishing a framework for community action in the field of marine environmental policy (Marine Strategy Framework Directive). Official Journal of the European Union, L 164/19, 25.06.2008.

Bianchi, TS, Engelhaupt, E, Westman, P, Andrén, T, Rolff, C and Elmgren, R. 2000. Cyanobacterial blooms in the Baltic Sea: Natural or human-induced? Limnology and Oceanography 45:716-726.

Engström, J, Koski, M, Viitasalo, M, Reinikainen, M, Repka, S and Sivonen, K. 2000. Feeding interactions of the copepods Eyrytemora affinis and Acartia bifilosa with the cyanobacteria Nodularia sp.

Finni, T., Kononen, K., Olsonen, R., Wallström, K., 2001. The history of cyanobacterial blooms in the Baltic Sea. Ambio 30, 172-178. Journal of Plankton Research 22:1403-1409.

HELCOM, 2007. Activities 2006 Overview. Baltic Sea Environment Proceedings 112. 74 pp.

HELCOM. 2012. HELCOM core indicators, final report of the HELCOM CORESET project. Baltic Sea Environment Proceedings 136. 71 pp.

HELCOM. 2013. Eutrophication status of the Baltic Sea 2007-2011 - A concise thematic assessment. Baltic Sea Environment Proceedings 143. 41 pp. Available online at

Hällfors H, Backer H, Leppänen J-M, Hällfors S, Hällfors G and Kuosa H. The northern Baltic Sea phytoplankton communities in  1903-1911 and 1993-2005: a comparison of historical and modern species data. Hydrobiologia DOI 10.1007/s10750-012-1414-4.

Kahru, M., Elmgren, R. 2014. Satellite detection of multi-decadal time series of cyanobacteria accumulations in the Baltic Sea. Biogeosciences Discussions, 11, 3319-3364.

Kahru M, Horstmann U and Rud O 1994. Satellite detection of increased cyanobacteria blooms in the Baltic Sea: natural fluctuation or ecosystem change? Ambio 23:469-472.

Maritorena S, Siegel, DA, Peterson, AR, 2002. Optimization of a semianalytical ocean color model for global-scale applications. Applied Optics, 41: 2705-2714.

Maritorena S, Fanton d'Andon, OH, Mangin, A, Siegel, DA, 2010. Merged Satellite Ocean Color Data Products Using a Bio-Optical Model: Characteristics, Benefits and Issues. Remote Sensing of Environment, 114, 8: 1791-1804.

O'Reilly, J. E., Maritorena, S., Mitchell, B. G., Siegel, D. A., Carder, K. L., Garver, S. A., Kahru, M. and McClain, C. 1998. Ocean color chlorophyll algorithms for SeaWiFS. Journal of Geophysical Research: Oceans (1978–2012), 103(C11), 24937-24953.

O'Reilly, JE, Maritorena, S, Siegel, DA, O'Brien, MC, Toole, D, Mitchell, BG, Kahru, M, Chavez, FP, Strutton, P, Cota, GF, Hooker, SB, McClain, CR, Carder, KL, Müller-Karger, F, Harding, L, Magnuson, A, Phinney, D, Moore, GF, Aiken, J, Arrigo, KR, Letelier, R, Culver, M, 2000. Ocean color chlorophyll algorithms for SeaWiFS, OC2, and OC4: Version 4. In S. B. Hooker, & E. R. Firestone (Eds.), SeaWiFS Postlaunch Calibration and Validation Analyses, Part 3, NASA Technical Memorandum, 2000-206892, vol. 11 ( pp. 9 – 27). Greenbelt, MD: NASA Goddard Space Center.

Poutanen, E. L. & Nikkilä, K. (2001). Carotenoid pigments as tracers of cyanobacterial blooms in recent and post-glacial sediments of the Baltic Sea. AMBIO: A Journal of the Human Environment, 30(4), 179-183.

Rapala, J, Kilponen, J, Järvinen, M, Lahti, K. 2012. Finland: guidelines for monitoring of cyanobacteria and their toxins. In Chorus, I. (ed.). Current approaches to Cyanotoxin risk assessment, risk management and regulations in different countries. Umweltbundesamt publications, 63: 54-62.

Rodionov, S. N. 2004. A sequential algorithm for testing climate regime shifts. Geophysical Research Letters, 31(9), L09204.

Rodionov, S., & Overland, J. E. 2005. Application of a sequential regime shift detection method to the bering sea ecosystem. ICES Journal of Marine Science, 62(3), 328-332.

Schroeder, TH, Behnert, I, Schaale, M, Fisher, J, Doerffer, R, 2007a. Atmospheric correction for MERIS above Case-2 waters. International Journal of Remote Sensing, 28, pp. 1469–1486.

Schroeder, TH, Schaale, M, Fisher, J, 2007b. Retrieval of atmospheric and oceanic properties from MERIS measurements: A new Case-2 water processor for BEAM. International Journal of Remote Sensing, 28: 5627-5630.

Sellner, KG, Olson, MM and Kononen, K, 1994. Copepod grazing in a summer cyanobacteria bloom in the Gulf of Finland. Hydrobiologia 292/293:249-254.

Sopanen, S, Uronen, P, Kuuppo, P, Svensen, C, Rühl, A, Tamminen, T, Granéli, E and Legrand, C, 2009. Transfer of nodularin to the copepod Eyrytemora affinis through the microbial food web. Aquat. Microb. Ecol. 55:115-130.

Suikkanen, S, Fistarol, GO and Granéli, E, 2004. Allelopathic effects of the Baltic cyanobacteria Nodularia spumigena, Aphanizomenon flos-aquae and Anabaena lemmermannii on algal monocultures. Journal of Experimental Marine Biology and Ecology 308:85-101.

Suikkanen, S, Fistarol, GO and Granéli, E, 2005. Effects of cyanobacterial allelochemicals on a natural plankton community. Marine Ecology Progress Series 287:1-9.

Vahtera E, Conley DJ, Gustafsson BG, Kuosa H, Pitkänen H, Savchuk OP, Tamminen T, Viitasalo M, Voss M, Wasmund N, Wulff F, 2007a. Internal ecosystem feedbacks enhance nitrogen-fixing cyanobacteria blooms and complicate management in the Baltic Sea. Ambio 36:186-194.

Wasmund N, Busch S, Göbel J, Gromisz S, Höglander H, Jaanus A, Johansen M, Jurgensone I, Karlsson C, Kownacka J, Kraśniewski W, Lehtinen S, Olenina I, v. Weber M, 2015. Cyanobacteria biomass. HELCOM Baltic Sea Environment Fact Sheet 2015, Published 18 September 201 5.


HELCOM core indicator report,
ISSN 2343-2543