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Figure 7.7 - Development of algal biomass (chlorophyll a concentrations) in European lakes aggregated to geographic regions for the period 1991-2006. Should be updated with SoE data until 2009.

Notes: Countries included in the regions are: East (EE, HU, LT, LV, PL, SI, SK); West (AT, BE, CH, DE, DK, FR, GB, IE, NL); North (FI, IS, SE); South (CY, IT, PT); South-East (BA, BG, HR, MK, RS, TR).