eesti teaduste
akadeemia kirjastus
SINCE 1952
Proceeding cover
of the estonian academy of sciences
ISSN 1736-7530 (Electronic)
ISSN 1736-6046 (Print)
Impact Factor (2020): 1.045

Beach wrack macrovegetation index for assessing coastal phytobenthic biodiversity; pp. 78–87

Full article in PDF format | doi: 10.3176/proc.2016.1.08

Kaire Torn, Georg Martin, Ülo Suursaar


The EU Marine Strategy Framework Directive (MSFD) requires assessment of environmental status in relation to changing human pressures. In this study taxonomic composition of beach wrack is proposed as an indicator for the assessment of coastal sea benthic macrovegetation biodiversity within the context of the MSFD. Based on the relationships between eutrophication metrics and taxonomic structure of benthic vegetation, the Beach Wrack Macrovegetation Index (BMI) was developed and tested as a case study of the northern Gulf of Riga (Baltic Sea). The index showed a higher benthic biodiversity in areas with higher water transparency, lower nutrient concentrations, and lower Baltic Sea Pressure Index values. Compared to commonly used metrics, the BMI is an easy-to-use and cost-effective method, which can be further incorporated within a citizen science project. The method can be recommended for the areas that are not affected by strong tides or persistent currents. Boreal summer is the preferred season for sampling because then the impact of hydrodynamic effects on the structure of stormcast is the lowest.


Andersen, J. H., Schlüter, L., and Ærtebjerg, G. 2006. Coastal eutrophication: recent developments in definitions and implications for monitoring strategies. J. Plankton Res., 28, 621–628.

Bäck, S., Ekebom, J., and Kangas, P. 2002. A proposal for a long-term baseline phytobenthos monitoring programme for the Finnish Baltic coastal waters: monitoring submerged rocky shore vegetation. Environ. Monit. Assess., 79, 13–27.

Birk, S., Bonne, W., Borja, A., Brucet, S., Courrat, A., Poikane, S., et al. 2012. Three hundred ways to assess Europe’s surface waters: an almost complete overview of biological methods to implement the Water Framework Directive. Ecol. Indic., 18, 31–41.

Borja, A. and Elliot, M. 2013. Marine monitoring during an economic crisis: the cure is worse than the disease. Mar. Pollut. Bull., 68, 1–3.

Canning-Clode, J., Valdivia, N., Molis, M., Thomason, J. C., and Wahl, M. 2008. Estimation of regional richness in marine benthic communities: quantifying the error. Limnol. Oceanogr.: Methods, 6, 580–590.

Clarke, K. R. and Gorley, R. N. 2006. PRIMER v6: User Manual/Tutorial. PRIMER-E, Plymouth, UK.

Cochrane, S. K. J., Connor, D. W., Nilsson, P., Mitchell, I., Reker, J., Franco, J., et al. 2010. Marine Strategy Framework Directive – Task Group 1 Report Biological Diversity. EUR 24337 EN – Joint Research Centre, Luxembourg: Office for Official Publications of the European Communities.

Desrochers, R. E. and Anand, M. 2004. From traditional diversity indices to taxonomic diversity indices. Int. J. Ecol. Environ. Sci., 30, 85–92.

European Commission. 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. Official Journal of the European Communities, L372/1.

European Commission. 2008. Directive 2008/56/EC of the European Parliament and of 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 Communities, L164/19.

European Commission. 2010. Commission decision of 1 September 2010 on criteria and methodological standards on good environmental status of marine waters. Official Journal of the European Communities, L232/14.

Gunderson, L. H. and Pritchard, L. Jr. (eds). 2002. Resilience and the Behavior of Large-Scale Ecosystems. SCOPE volume. Island Press, Washington, DC.

Hand, E. 2010. Citizen science: People power. Nature, 466, 685–687.

HELCOM. 2009. Biodiversity of the Baltic Sea – An integrated thematic assessment on biodiversity and nature conservation in the Baltic Sea. Balt. Sea Environ. Proc., No. 116B.

HELCOM. 2010. Towards a tool for quantifying anthropogenic pressures and potential impacts on the Baltic Sea marine environment: A background document on the method, data and testing of the Baltic Sea Pressure and Impact Indices. Balt. Sea Environ. Proc., No. 125.

HELCOM. 2012. Development of a set of core indicators: Interim report of the HELCOM CORESET project. PART B: Descriptions of the indicators. Balt. Sea Environ. Proc., No. 129B.

Karez, R., Engelbert, S., Kraufvelin, P., Pedersen, M. F., and Sommer, U. 2004. Biomass response and changes in composition of ephemeral macroalgal assemblages along an experimental gradient of nutrient enrichment. Aquat. Bot., 78, 103–117.

Kotta, J. and Möller, T. 2014. Linking nutrient loading, local abiotic variables, richness and biomasses of macro­phytes, and associated invertebrate species in the north-eastern Baltic Sea. Estonian J. Ecol., 63, 145–167.

Kotta, J., Lauringson, V., Martin, G., Simm, M, Kotta, I., Herkül, K., and Ojaveer, H. 2008. Gulf of Riga and Pärnu Bay. In Ecology of Baltic Coastal Waters (Schiewer, U., ed.), pp. 2017–2043. Springer-Verlag, Berlin.

Kuuppo, P., Blauw, A., Møhlenberg, F., Kaas, H., Henriksen, P., Krause-Jensen, D., et al. 2006. Nutrients and eutrophi­cation in coastal and transitional waters. In Indicators and Methods for the Ecological Status Assessment Under the Water Framework Directive (Solimini, A. G., Cardoso, A. C., and Heiskanen, A.–S., eds), pp. 33–80. European Communities.

Lampadariou, N., Karakassis, I., and Pearson, T. H. 2005. Cost/benefit analysis of a benthic monitoring programme of organic benthic enrichment using different sampling and analysis methods. Mar. Pollut. Bull., 50, 1606–1618.

Magurran, A. E. and McGill, B. J. (eds). 2011. Biological Diversity: Frontiers in Measurements and Assessment. Oxford University Press, New York.

Naeem, S. and Li, S. 1997. Biodiversity enhances ecosystem reliability. Nature, 390, 507–509.

Norkko, J., Bonsdorff, E., and Norkko, A. 2000. Drifting algal mats as an alternative habitat for benthic invertebrates: species specific responses to transient resource. J. Exp. Mar. Biol. Ecol., 248, 79–104.

Ojaveer, H., Jaanus, A., MacKenzie, B., Martin, G., Olenin, S., Radziejewska, T., et al. 2010. Status of biodiversity in the Baltic Sea. PLoS ONE, 5, e12467.

Orr, M., Zimmer, M., Jelinski, D. E., and Mews, M. 2005. Wrack deposition on different beach types: spatial and temporal variation in the pattern of subsidy. Ecology, 86, 1496–1507.

Osborn, D. A., Pearse, J., and Roe, C. 2002. Monitoring rocky intertidal shorelines: a role for the public in resource management. In California and the World Ocean '02, Conference Proceedings (Magoon, O. T., Converse, H., Baird, B., Jines, B., and Miller-Henson, M., eds), pp. 624–636. American Society of Civil Engineers, Reston, VA, USA.

Schramm, W. 1996. The Baltic Sea and its transition zones. In Marine Bentic Vegetation. Recent Changes and the Effects of Eutrophication (Schramm, W. and Nienhuis, P. H., eds), pp. 131–163. Springer-Verlag, Berlin.

Shannon, C. E. 1948. A mathematical theory of communication. Bell System Technical Journal, 27, 379–423.

Simpson, E. H. 1949. Measurement of diversity. Nature, 163, 688.

Southwood, R. and Henderson, P. A. 2000. Ecological Methods. Blackwell Science, Oxford.

StatSoft, Inc. 2013. Electronic Statistics Textbook. StatSoft, Tulsa. http://www. (accessed 28.01.2016).

Suursaar, Ü. 2013. Locally calibrated wave hindcasts in the Estonian coastal sea in 1966–2011. Estonian J. Earth Sci., 62, 42–56.

Suursaar, Ü., Kullas, T., and Otsmann, M. 2002. Modelling of extreme sea levels in the coastal waters of West Estonia. Cont. Shelf Res., 22, 2001–2019.

Suursaar, Ü., Kullas, T., and Aps, R. 2012. Currents and waves in the northern Gulf of Riga: measurement and long-term hindcast. Oceanologia, 54, 421–447.

Suursaar, Ü., Torn, K., Martin, G., Herkül, K., and Kullas, T. 2014. Formation and species composition of stormcast beach wrack in the Gulf of Riga, Baltic Sea. Oceanologia, 56, 673–695.

Torn, K. and Martin, G. 2011. Assessment method for the ecological status of Estonian coastal waters based on submerged aquatic vegetation. In Sustainable Development and Planning V (Brebbia, C. A. and Beriatos, E., eds), pp. 443–452. WIT Press, South­ampton.

Torn, K. and Martin, G. 2012. Response of submerged aquatic vegetation to eutrophication-related environment descriptors in coastal waters of the NE Baltic Sea. Estonian J. Ecol., 61, 106–118.

Torn, K., Martin, G., and Rostin, L. 2014. Testing and develop­ment of different metrics and indexes describing submerged aquatic vegetation for assessment of the ecological status of semi-enclosed coastal water bodies in the NE Baltic Sea. Estonian J. Ecol., 63, 262–281.

Viaroli, P., Naldi, M., Bondavalli, C., and Bencivelli, S. 1996. Growth of the seaweed Ulva rigida C. Agardh in relation to biomass densities, internal nutrient pool and external nutrient supply in the Sacca di Goro lagoon (Northern Italy). Hydrobiologia, 329, 93–103.

Vuorinen, I., Hänninen, J., Rajasilta, M., Laine, P., Eklund, J., Montesino-Pouzols, F., et al. 2015. Scenario simulations of future salinity and ecological consequences in the Baltic Sea and adjacent North Sea areas – implications for environmental monitoring. Ecol. Indic., 50, 196–205.

Wallentinus, I. 1979. Environmental Influences on Benthic Macrovegetation in the Trosa–Askö Area, Northern Baltic Proper. II. The Ecology of Macroalgae and Submersed Phanerogams. Contributions from the Askö Laboratory 25. Stockholm University.

Worm, B., Barbier, E. B., Beaumont, N., Duffy, J. E., Folke, C., Halpern, B. S., et al. 2006. Impacts of bio­diversity loss on ocean ecosystem services. Science, 314, 787–790.

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