Chlorophyll-a in transitional, coastal and marine waters
Assessment made on 01 Aug 2003
ClassificationCoasts and seas (Primary theme)
DPSIR: Driving force
- WEU 013
Policy issue: Effects of nutrient load reductions on coastal concentrations of phytoplankton
No general trend is observed in summer surface chlorophyll-a concentrations either in the Baltic Sea area, Greater North Sea or coastal waters of Greece. The majority of locations show no trend. A few locations in Danish estuaries and the Danish North Sea show a decreasing trend, whilst a few locations in Belgian, Finnish, Lithuanian and Swedish coastal waters show an increasing trend. No trend is observed in the Dutch coastal waters, which receive high nutrient inputs from the Rhine river basin, nor in Norwegian and Greek coastal waters. Finland reports that the increasing trend of chlorophyll-a in the eastern Gulf of Finland and in the Archipelago Sea is due to increase in phosphorus released from hypoxic/anoxic sediments (Kauppila and Bäck, 2001; Hänninen et al., 2000).
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This briefing is part of the EEA's report The European Environment - State and Outlook 2015. The EEA is an official agency of the EU, tasked with providing information on Europe’s environment.
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